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February 10, 2017 08:27
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增加了appendFormat的StringBuilder
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| package com.cmicat.lanVideoServer.util; | |
| import java.util.Formatter; | |
| import java.util.FormatterClosedException; | |
| import java.util.IllegalFormatException; | |
| import java.util.Locale; | |
| /** | |
| * 整合了 {@link java.lang.StringBuilder} 和 {@link Formatter}的功能。 | |
| * 给 {@link java.lang.StringBuilder } 加上了 appendFormat 函数 | |
| */ | |
| public final class StringBuilder implements CharSequence, Appendable{ | |
| private final java.lang.StringBuilder sb; | |
| private final Formatter formatter; | |
| /** | |
| * Constructs a string builder with no characters in it and an | |
| * initial capacity of 16 characters. | |
| */ | |
| public StringBuilder() { | |
| sb = new java.lang.StringBuilder(16); | |
| formatter = new Formatter(sb); | |
| } | |
| /** | |
| * Constructs a string builder with no characters in it and an | |
| * initial capacity specified by the {@code capacity} argument. | |
| * | |
| * @param capacity the initial capacity. | |
| * @throws NegativeArraySizeException if the {@code capacity} | |
| * argument is less than {@code 0}. | |
| */ | |
| public StringBuilder(int capacity) { | |
| sb = new java.lang.StringBuilder(capacity); | |
| formatter = new Formatter(sb); | |
| } | |
| /** | |
| * Constructs a string builder initialized to the contents of the | |
| * specified string. The initial capacity of the string builder is | |
| * {@code 16} plus the length of the string argument. | |
| * | |
| * @param str the initial contents of the buffer. | |
| */ | |
| public StringBuilder(String str) { | |
| sb = new java.lang.StringBuilder(str.length() + 16); | |
| append(str); | |
| formatter = new Formatter(sb); | |
| } | |
| /** | |
| * Constructs a string builder that contains the same characters | |
| * as the specified {@code CharSequence}. The initial capacity of | |
| * the string builder is {@code 16} plus the length of the | |
| * {@code CharSequence} argument. | |
| * | |
| * @param seq the sequence to copy. | |
| */ | |
| public StringBuilder(CharSequence seq) { | |
| sb = new java.lang.StringBuilder(seq.length() + 16); | |
| append(seq); | |
| formatter = new Formatter(sb); | |
| } | |
| @Override | |
| public StringBuilder append(CharSequence s) { | |
| sb.append(s); | |
| return this; | |
| } | |
| /** | |
| * Appends the string representation of the {@code Object} argument. | |
| * <p> | |
| * The overall effect is exactly as if the argument were converted | |
| * to a string by the method {@link String#valueOf(Object)}, | |
| * and the characters of that string were then | |
| * {@link #append(String) appended} to this character sequence. | |
| * | |
| * @param obj an {@code Object}. | |
| * @return a reference to this object. | |
| */ | |
| public StringBuilder append(Object obj) { | |
| sb.append(obj); | |
| return this; | |
| } | |
| /** | |
| * Appends the specified string to this character sequence. | |
| * <p> | |
| * The characters of the {@code String} argument are appended, in | |
| * order, increasing the length of this sequence by the length of the | |
| * argument. If {@code str} is {@code null}, then the four | |
| * characters {@code "null"} are appended. | |
| * <p> | |
| * Let <i>n</i> be the length of this character sequence just prior to | |
| * execution of the {@code append} method. Then the character at | |
| * index <i>k</i> in the new character sequence is equal to the character | |
| * at index <i>k</i> in the old character sequence, if <i>k</i> is less | |
| * than <i>n</i>; otherwise, it is equal to the character at index | |
| * <i>k-n</i> in the argument {@code str}. | |
| * | |
| * @param str a string. | |
| * @return a reference to this object. | |
| */ | |
| public StringBuilder append(String str) { | |
| sb.append(str); | |
| return this; | |
| } | |
| /** | |
| * Appends the specified {@code StringBuffer} to this sequence. | |
| * <p> | |
| * The characters of the {@code StringBuffer} argument are appended, | |
| * in order, to this sequence, increasing the | |
| * length of this sequence by the length of the argument. | |
| * If {@code sb} is {@code null}, then the four characters | |
| * {@code "null"} are appended to this sequence. | |
| * <p> | |
| * Let <i>n</i> be the length of this character sequence just prior to | |
| * execution of the {@code append} method. Then the character at index | |
| * <i>k</i> in the new character sequence is equal to the character at | |
| * index <i>k</i> in the old character sequence, if <i>k</i> is less than | |
| * <i>n</i>; otherwise, it is equal to the character at index <i>k-n</i> | |
| * in the argument {@code sb}. | |
| * | |
| * @param sb the {@code StringBuffer} to append. | |
| * @return a reference to this object. | |
| */ | |
| public StringBuilder append(StringBuffer sb) { | |
| this.sb.append(sb); | |
| return this; | |
| } | |
| /** | |
| * Appends a subsequence of the specified {@code CharSequence} to this | |
| * sequence. | |
| * <p> | |
| * Characters of the argument {@code s}, starting at | |
| * index {@code start}, are appended, in order, to the contents of | |
| * this sequence up to the (exclusive) index {@code end}. The length | |
| * of this sequence is increased by the value of {@code end - start}. | |
| * <p> | |
| * Let <i>n</i> be the length of this character sequence just prior to | |
| * execution of the {@code append} method. Then the character at | |
| * index <i>k</i> in this character sequence becomes equal to the | |
| * character at index <i>k</i> in this sequence, if <i>k</i> is less than | |
| * <i>n</i>; otherwise, it is equal to the character at index | |
| * <i>k+start-n</i> in the argument {@code s}. | |
| * <p> | |
| * If {@code s} is {@code null}, then this method appends | |
| * characters as if the s parameter was a sequence containing the four | |
| * characters {@code "null"}. | |
| * | |
| * @param s the sequence to append. | |
| * @param start the starting index of the subsequence to be appended. | |
| * @param end the end index of the subsequence to be appended. | |
| * @return a reference to this object. | |
| * @throws IndexOutOfBoundsException if | |
| * {@code start} is negative, or | |
| * {@code start} is greater than {@code end} or | |
| * {@code end} is greater than {@code s.length()} | |
| */ | |
| @Override | |
| public StringBuilder append(CharSequence s, int start, int end) { | |
| sb.append(s, start, end); | |
| return this; | |
| } | |
| /** | |
| * Appends the string representation of the {@code char} array | |
| * argument to this sequence. | |
| * <p> | |
| * The characters of the array argument are appended, in order, to | |
| * the contents of this sequence. The length of this sequence | |
| * increases by the length of the argument. | |
| * <p> | |
| * The overall effect is exactly as if the argument were converted | |
| * to a string by the method {@link String#valueOf(char[])}, | |
| * and the characters of that string were then | |
| * {@link #append(String) appended} to this character sequence. | |
| * | |
| * @param str the characters to be appended. | |
| * @return a reference to this object. | |
| */ | |
| public StringBuilder append(char[] str) { | |
| sb.append(str); | |
| return this; | |
| } | |
| /** | |
| * Appends the string representation of a subarray of the | |
| * {@code char} array argument to this sequence. | |
| * <p> | |
| * Characters of the {@code char} array {@code str}, starting at | |
| * index {@code offset}, are appended, in order, to the contents | |
| * of this sequence. The length of this sequence increases | |
| * by the value of {@code len}. | |
| * <p> | |
| * The overall effect is exactly as if the arguments were converted | |
| * to a string by the method {@link String#valueOf(char[],int,int)}, | |
| * and the characters of that string were then | |
| * {@link #append(String) appended} to this character sequence. | |
| * | |
| * @param str the characters to be appended. | |
| * @param offset the index of the first {@code char} to append. | |
| * @param len the number of {@code char}s to append. | |
| * @return a reference to this object. | |
| * @throws IndexOutOfBoundsException | |
| * if {@code offset < 0} or {@code len < 0} | |
| * or {@code offset+len > str.length} | |
| */ | |
| public StringBuilder append(char[] str, int offset, int len) { | |
| sb.append(str, offset, len); | |
| return this; | |
| } | |
| /** | |
| * Appends the string representation of the {@code boolean} | |
| * argument to the sequence. | |
| * <p> | |
| * The overall effect is exactly as if the argument were converted | |
| * to a string by the method {@link String#valueOf(boolean)}, | |
| * and the characters of that string were then | |
| * {@link #append(String) appended} to this character sequence. | |
| * | |
| * @param b a {@code boolean}. | |
| * @return a reference to this object. | |
| */ | |
| public StringBuilder append(boolean b) { | |
| sb.append(b); | |
| return this; | |
| } | |
| /** | |
| * Appends the string representation of the {@code char} | |
| * argument to this sequence. | |
| * <p> | |
| * The argument is appended to the contents of this sequence. | |
| * The length of this sequence increases by {@code 1}. | |
| * <p> | |
| * The overall effect is exactly as if the argument were converted | |
| * to a string by the method {@link String#valueOf(char)}, | |
| * and the character in that string were then | |
| * {@link #append(String) appended} to this character sequence. | |
| * | |
| * @param c a {@code char}. | |
| * @return a reference to this object. | |
| */ | |
| @Override | |
| public StringBuilder append(char c) { | |
| sb.append(c); | |
| return this; | |
| } | |
| /** | |
| * Appends the string representation of the {@code int} | |
| * argument to this sequence. | |
| * <p> | |
| * The overall effect is exactly as if the argument were converted | |
| * to a string by the method {@link String#valueOf(int)}, | |
| * and the characters of that string were then | |
| * {@link #append(String) appended} to this character sequence. | |
| * | |
| * @param i an {@code int}. | |
| * @return a reference to this object. | |
| */ | |
| public StringBuilder append(int i) { | |
| sb.append(i); | |
| return this; | |
| } | |
| /** | |
| * Appends the string representation of the {@code long} | |
| * argument to this sequence. | |
| * <p> | |
| * The overall effect is exactly as if the argument were converted | |
| * to a string by the method {@link String#valueOf(long)}, | |
| * and the characters of that string were then | |
| * {@link #append(String) appended} to this character sequence. | |
| * | |
| * @param lng a {@code long}. | |
| * @return a reference to this object. | |
| */ | |
| public StringBuilder append(long lng) { | |
| sb.append(lng); | |
| return this; | |
| } | |
| /** | |
| * Appends the string representation of the {@code float} | |
| * argument to this sequence. | |
| * <p> | |
| * The overall effect is exactly as if the argument were converted | |
| * to a string by the method {@link String#valueOf(float)}, | |
| * and the characters of that string were then | |
| * {@link #append(String) appended} to this character sequence. | |
| * | |
| * @param f a {@code float}. | |
| * @return a reference to this object. | |
| */ | |
| public StringBuilder append(float f) { | |
| sb.append(f); | |
| return this; | |
| } | |
| /** | |
| * Appends the string representation of the {@code double} | |
| * argument to this sequence. | |
| * <p> | |
| * The overall effect is exactly as if the argument were converted | |
| * to a string by the method {@link String#valueOf(double)}, | |
| * and the characters of that string were then | |
| * {@link #append(String) appended} to this character sequence. | |
| * | |
| * @param d a {@code double}. | |
| * @return a reference to this object. | |
| */ | |
| public StringBuilder append(double d) { | |
| sb.append(d); | |
| return this; | |
| } | |
| /** | |
| * Appends the string representation of the {@code codePoint} | |
| * argument to this sequence. | |
| * | |
| * <p> The argument is appended to the contents of this sequence. | |
| * The length of this sequence increases by | |
| * {@link Character#charCount(int) Character.charCount(codePoint)}. | |
| * | |
| * <p> The overall effect is exactly as if the argument were | |
| * converted to a {@code char} array by the method | |
| * {@link Character#toChars(int)} and the character in that array | |
| * were then {@link #append(char[]) appended} to this character | |
| * sequence. | |
| * | |
| * @param codePoint a Unicode code point | |
| * @return a reference to this object. | |
| * @exception IllegalArgumentException if the specified | |
| * {@code codePoint} isn't a valid Unicode code point | |
| * @since StringBuilder 1.5 | |
| */ | |
| public StringBuilder appendCodePoint(int codePoint) { | |
| sb.appendCodePoint(codePoint); | |
| return this; | |
| } | |
| /** | |
| * Removes the characters in a substring of this sequence. | |
| * The substring begins at the specified {@code start} and extends to | |
| * the character at index {@code end - 1} or to the end of the | |
| * sequence if no such character exists. If | |
| * {@code start} is equal to {@code end}, no changes are made. | |
| * | |
| * @param start The beginning index, inclusive. | |
| * @param end The ending index, exclusive. | |
| * @return This object. | |
| * @throws StringIndexOutOfBoundsException if {@code start} | |
| * is negative, greater than {@code length()}, or | |
| * greater than {@code end}. | |
| */ | |
| public StringBuilder delete(int start, int end) { | |
| sb.delete(start, end); | |
| return this; | |
| } | |
| /** | |
| * Removes the {@code char} at the specified position in this | |
| * sequence. This sequence is shortened by one {@code char}. | |
| * | |
| * <p>Note: If the character at the given index is a supplementary | |
| * character, this method does not remove the entire character. If | |
| * correct handling of supplementary characters is required, | |
| * determine the number of {@code char}s to remove by calling | |
| * {@code Character.charCount(thisSequence.codePointAt(index))}, | |
| * where {@code thisSequence} is this sequence. | |
| * | |
| * @param index Index of {@code char} to remove | |
| * @return This object. | |
| * @throws StringIndexOutOfBoundsException if the {@code index} | |
| * is negative or greater than or equal to | |
| * {@code length()}. | |
| */ | |
| public StringBuilder deleteCharAt(int index) { | |
| sb.deleteCharAt(index); | |
| return this; | |
| } | |
| /** | |
| * Replaces the characters in a substring of this sequence | |
| * with characters in the specified {@code String}. The substring | |
| * begins at the specified {@code start} and extends to the character | |
| * at index {@code end - 1} or to the end of the | |
| * sequence if no such character exists. First the | |
| * characters in the substring are removed and then the specified | |
| * {@code String} is inserted at {@code start}. (This | |
| * sequence will be lengthened to accommodate the | |
| * specified String if necessary.) | |
| * | |
| * @param start The beginning index, inclusive. | |
| * @param end The ending index, exclusive. | |
| * @param str String that will replace previous contents. | |
| * @return This object. | |
| * @throws StringIndexOutOfBoundsException if {@code start} | |
| * is negative, greater than {@code length()}, or | |
| * greater than {@code end}. | |
| */ | |
| public StringBuilder replace(int start, int end, String str) { | |
| sb.replace(start, end, str); | |
| return this; | |
| } | |
| /** | |
| * Inserts the string representation of a subarray of the {@code str} | |
| * array argument into this sequence. The subarray begins at the | |
| * specified {@code offset} and extends {@code len} {@code char}s. | |
| * The characters of the subarray are inserted into this sequence at | |
| * the position indicated by {@code index}. The length of this | |
| * sequence increases by {@code len} {@code char}s. | |
| * | |
| * @param index position at which to insert subarray. | |
| * @param str A {@code char} array. | |
| * @param offset the index of the first {@code char} in subarray to | |
| * be inserted. | |
| * @param len the number of {@code char}s in the subarray to | |
| * be inserted. | |
| * @return This object | |
| * @throws StringIndexOutOfBoundsException if {@code index} | |
| * is negative or greater than {@code length()}, or | |
| * {@code offset} or {@code len} are negative, or | |
| * {@code (offset+len)} is greater than | |
| * {@code str.length}. | |
| */ | |
| public StringBuilder insert(int index, char[] str, int offset, int len) { | |
| sb.insert(index, str, offset, len); | |
| return this; | |
| } | |
| /** | |
| * Inserts the string representation of the {@code Object} | |
| * argument into this character sequence. | |
| * <p> | |
| * The overall effect is exactly as if the second argument were | |
| * converted to a string by the method {@link String#valueOf(Object)}, | |
| * and the characters of that string were then | |
| * {@link #insert(int,String) inserted} into this character | |
| * sequence at the indicated offset. | |
| * <p> | |
| * The {@code offset} argument must be greater than or equal to | |
| * {@code 0}, and less than or equal to the {@linkplain #length() length} | |
| * of this sequence. | |
| * | |
| * @param offset the offset. | |
| * @param obj an {@code Object}. | |
| * @return a reference to this object. | |
| * @throws StringIndexOutOfBoundsException if the offset is invalid. | |
| */ | |
| public StringBuilder insert(int offset, Object obj) { | |
| sb.insert(offset, obj); | |
| return this; | |
| } | |
| /** | |
| * Inserts the string into this character sequence. | |
| * <p> | |
| * The characters of the {@code String} argument are inserted, in | |
| * order, into this sequence at the indicated offset, moving up any | |
| * characters originally above that position and increasing the length | |
| * of this sequence by the length of the argument. If | |
| * {@code str} is {@code null}, then the four characters | |
| * {@code "null"} are inserted into this sequence. | |
| * <p> | |
| * The character at index <i>k</i> in the new character sequence is | |
| * equal to: | |
| * <ul> | |
| * <li>the character at index <i>k</i> in the old character sequence, if | |
| * <i>k</i> is less than {@code offset} | |
| * <li>the character at index <i>k</i>{@code -offset} in the | |
| * argument {@code str}, if <i>k</i> is not less than | |
| * {@code offset} but is less than {@code offset+str.length()} | |
| * <li>the character at index <i>k</i>{@code -str.length()} in the | |
| * old character sequence, if <i>k</i> is not less than | |
| * {@code offset+str.length()} | |
| * </ul><p> | |
| * The {@code offset} argument must be greater than or equal to | |
| * {@code 0}, and less than or equal to the {@linkplain #length() length} | |
| * of this sequence. | |
| * | |
| * @param offset the offset. | |
| * @param str a string. | |
| * @return a reference to this object. | |
| * @throws StringIndexOutOfBoundsException if the offset is invalid. | |
| */ | |
| public StringBuilder insert(int offset, String str) { | |
| sb.insert(offset, str); | |
| return this; | |
| } | |
| /** | |
| * Inserts the string representation of the {@code char} array | |
| * argument into this sequence. | |
| * <p> | |
| * The characters of the array argument are inserted into the | |
| * contents of this sequence at the position indicated by | |
| * {@code offset}. The length of this sequence increases by | |
| * the length of the argument. | |
| * <p> | |
| * The overall effect is exactly as if the second argument were | |
| * converted to a string by the method {@link String#valueOf(char[])}, | |
| * and the characters of that string were then | |
| * {@link #insert(int,String) inserted} into this character | |
| * sequence at the indicated offset. | |
| * <p> | |
| * The {@code offset} argument must be greater than or equal to | |
| * {@code 0}, and less than or equal to the {@linkplain #length() length} | |
| * of this sequence. | |
| * | |
| * @param offset the offset. | |
| * @param str a character array. | |
| * @return a reference to this object. | |
| * @throws StringIndexOutOfBoundsException if the offset is invalid. | |
| */ | |
| public StringBuilder insert(int offset, char[] str) { | |
| sb.insert(offset, str); | |
| return this; | |
| } | |
| /** | |
| * Inserts the specified {@code CharSequence} into this sequence. | |
| * <p> | |
| * The characters of the {@code CharSequence} argument are inserted, | |
| * in order, into this sequence at the indicated offset, moving up | |
| * any characters originally above that position and increasing the length | |
| * of this sequence by the length of the argument s. | |
| * <p> | |
| * The result of this method is exactly the same as if it were an | |
| * invocation of this object's | |
| * {@link #insert(int,CharSequence,int,int) insert}(dstOffset, s, 0, s.length()) | |
| * method. | |
| * | |
| * <p>If {@code s} is {@code null}, then the four characters | |
| * {@code "null"} are inserted into this sequence. | |
| * | |
| * @param dstOffset the offset. | |
| * @param s the sequence to be inserted | |
| * @return a reference to this object. | |
| * @throws IndexOutOfBoundsException if the offset is invalid. | |
| */ | |
| public StringBuilder insert(int dstOffset, CharSequence s) { | |
| sb.insert(dstOffset, s); | |
| return this; | |
| } | |
| /** | |
| * Inserts a subsequence of the specified {@code CharSequence} into | |
| * this sequence. | |
| * <p> | |
| * The subsequence of the argument {@code s} specified by | |
| * {@code start} and {@code end} are inserted, | |
| * in order, into this sequence at the specified destination offset, moving | |
| * up any characters originally above that position. The length of this | |
| * sequence is increased by {@code end - start}. | |
| * <p> | |
| * The character at index <i>k</i> in this sequence becomes equal to: | |
| * <ul> | |
| * <li>the character at index <i>k</i> in this sequence, if | |
| * <i>k</i> is less than {@code dstOffset} | |
| * <li>the character at index <i>k</i>{@code +start-dstOffset} in | |
| * the argument {@code s}, if <i>k</i> is greater than or equal to | |
| * {@code dstOffset} but is less than {@code dstOffset+end-start} | |
| * <li>the character at index <i>k</i>{@code -(end-start)} in this | |
| * sequence, if <i>k</i> is greater than or equal to | |
| * {@code dstOffset+end-start} | |
| * </ul><p> | |
| * The {@code dstOffset} argument must be greater than or equal to | |
| * {@code 0}, and less than or equal to the {@linkplain #length() length} | |
| * of this sequence. | |
| * <p>The start argument must be nonnegative, and not greater than | |
| * {@code end}. | |
| * <p>The end argument must be greater than or equal to | |
| * {@code start}, and less than or equal to the length of s. | |
| * | |
| * <p>If {@code s} is {@code null}, then this method inserts | |
| * characters as if the s parameter was a sequence containing the four | |
| * characters {@code "null"}. | |
| * | |
| * @param dstOffset the offset in this sequence. | |
| * @param s the sequence to be inserted. | |
| * @param start the starting index of the subsequence to be inserted. | |
| * @param end the end index of the subsequence to be inserted. | |
| * @return a reference to this object. | |
| * @throws IndexOutOfBoundsException if {@code dstOffset} | |
| * is negative or greater than {@code this.length()}, or | |
| * {@code start} or {@code end} are negative, or | |
| * {@code start} is greater than {@code end} or | |
| * {@code end} is greater than {@code s.length()} | |
| */ | |
| public StringBuilder insert(int dstOffset, CharSequence s, int start, int end) { | |
| sb.insert(dstOffset, s, start, end); | |
| return this; | |
| } | |
| /** | |
| * Inserts the string representation of the {@code boolean} | |
| * argument into this sequence. | |
| * <p> | |
| * The overall effect is exactly as if the second argument were | |
| * converted to a string by the method {@link String#valueOf(boolean)}, | |
| * and the characters of that string were then | |
| * {@link #insert(int,String) inserted} into this character | |
| * sequence at the indicated offset. | |
| * <p> | |
| * The {@code offset} argument must be greater than or equal to | |
| * {@code 0}, and less than or equal to the {@linkplain #length() length} | |
| * of this sequence. | |
| * | |
| * @param offset the offset. | |
| * @param b a {@code boolean}. | |
| * @return a reference to this object. | |
| * @throws StringIndexOutOfBoundsException if the offset is invalid. | |
| */ | |
| public StringBuilder insert(int offset, boolean b) { | |
| sb.insert(offset, b); | |
| return this; | |
| } | |
| /** | |
| * Inserts the string representation of the {@code char} | |
| * argument into this sequence. | |
| * <p> | |
| * The overall effect is exactly as if the second argument were | |
| * converted to a string by the method {@link String#valueOf(char)}, | |
| * and the character in that string were then | |
| * {@link #insert(int,String) inserted} into this character | |
| * sequence at the indicated offset. | |
| * <p> | |
| * The {@code offset} argument must be greater than or equal to | |
| * {@code 0}, and less than or equal to the {@linkplain #length() length} | |
| * of this sequence. | |
| * | |
| * @param offset the offset. | |
| * @param c a {@code char}. | |
| * @return a reference to this object. | |
| * @throws IndexOutOfBoundsException if the offset is invalid. | |
| */ | |
| public StringBuilder insert(int offset, char c) { | |
| sb.insert(offset, c); | |
| return this; | |
| } | |
| /** | |
| * Inserts the string representation of the second {@code int} | |
| * argument into this sequence. | |
| * <p> | |
| * The overall effect is exactly as if the second argument were | |
| * converted to a string by the method {@link String#valueOf(int)}, | |
| * and the characters of that string were then | |
| * {@link #insert(int,String) inserted} into this character | |
| * sequence at the indicated offset. | |
| * <p> | |
| * The {@code offset} argument must be greater than or equal to | |
| * {@code 0}, and less than or equal to the {@linkplain #length() length} | |
| * of this sequence. | |
| * | |
| * @param offset the offset. | |
| * @param i an {@code int}. | |
| * @return a reference to this object. | |
| * @throws StringIndexOutOfBoundsException if the offset is invalid. | |
| */ | |
| public StringBuilder insert(int offset, int i) { | |
| sb.insert(offset, i); | |
| return this; | |
| } | |
| /** | |
| * Inserts the string representation of the {@code long} | |
| * argument into this sequence. | |
| * <p> | |
| * The overall effect is exactly as if the second argument were | |
| * converted to a string by the method {@link String#valueOf(long)}, | |
| * and the characters of that string were then | |
| * {@link #insert(int,String) inserted} into this character | |
| * sequence at the indicated offset. | |
| * <p> | |
| * The {@code offset} argument must be greater than or equal to | |
| * {@code 0}, and less than or equal to the {@linkplain #length() length} | |
| * of this sequence. | |
| * | |
| * @param offset the offset. | |
| * @param l a {@code long}. | |
| * @return a reference to this object. | |
| * @throws StringIndexOutOfBoundsException if the offset is invalid. | |
| */ | |
| public StringBuilder insert(int offset, long l) { | |
| sb.insert(offset, l); | |
| return this; | |
| } | |
| /** | |
| * Inserts the string representation of the {@code float} | |
| * argument into this sequence. | |
| * <p> | |
| * The overall effect is exactly as if the second argument were | |
| * converted to a string by the method {@link String#valueOf(float)}, | |
| * and the characters of that string were then | |
| * {@link #insert(int,String) inserted} into this character | |
| * sequence at the indicated offset. | |
| * <p> | |
| * The {@code offset} argument must be greater than or equal to | |
| * {@code 0}, and less than or equal to the {@linkplain #length() length} | |
| * of this sequence. | |
| * | |
| * @param offset the offset. | |
| * @param f a {@code float}. | |
| * @return a reference to this object. | |
| * @throws StringIndexOutOfBoundsException if the offset is invalid. | |
| */ | |
| public StringBuilder insert(int offset, float f) { | |
| sb.insert(offset, f); | |
| return this; | |
| } | |
| /** | |
| * Inserts the string representation of the {@code double} | |
| * argument into this sequence. | |
| * <p> | |
| * The overall effect is exactly as if the second argument were | |
| * converted to a string by the method {@link String#valueOf(double)}, | |
| * and the characters of that string were then | |
| * {@link #insert(int,String) inserted} into this character | |
| * sequence at the indicated offset. | |
| * <p> | |
| * The {@code offset} argument must be greater than or equal to | |
| * {@code 0}, and less than or equal to the {@linkplain #length() length} | |
| * of this sequence. | |
| * | |
| * @param offset the offset. | |
| * @param d a {@code double}. | |
| * @return a reference to this object. | |
| * @throws StringIndexOutOfBoundsException if the offset is invalid. | |
| */ | |
| public StringBuilder insert(int offset, double d) { | |
| sb.insert(offset, d); | |
| return this; | |
| } | |
| /** | |
| * Returns the index within this string of the first occurrence of the | |
| * specified substring. The integer returned is the smallest value | |
| * <i>k</i> such that: | |
| * <pre>{@code | |
| * this.toString().startsWith(str, <i>k</i>) | |
| * }</pre> | |
| * is {@code true}. | |
| * | |
| * @param str any string. | |
| * @return if the string argument occurs as a substring within this | |
| * object, then the index of the first character of the first | |
| * such substring is returned; if it does not occur as a | |
| * substring, {@code -1} is returned. | |
| */ | |
| public int indexOf(String str) { | |
| return sb.indexOf(str); | |
| } | |
| /** | |
| * Returns the index within this string of the first occurrence of the | |
| * specified substring, starting at the specified index. The integer | |
| * returned is the smallest value {@code k} for which: | |
| * <pre>{@code | |
| * k >= Math.min(fromIndex, this.length()) && | |
| * this.toString().startsWith(str, k) | |
| * }</pre> | |
| * If no such value of <i>k</i> exists, then -1 is returned. | |
| * | |
| * @param str the substring for which to search. | |
| * @param fromIndex the index from which to start the search. | |
| * @return the index within this string of the first occurrence of the | |
| * specified substring, starting at the specified index. | |
| */ | |
| public int indexOf(String str, int fromIndex) { | |
| return sb.indexOf(str, fromIndex); | |
| } | |
| /** | |
| * Returns the index within this string of the rightmost occurrence | |
| * of the specified substring. The rightmost empty string "" is | |
| * considered to occur at the index value {@code this.length()}. | |
| * The returned index is the largest value <i>k</i> such that | |
| * <pre>{@code | |
| * this.toString().startsWith(str, k) | |
| * }</pre> | |
| * is true. | |
| * | |
| * @param str the substring to search for. | |
| * @return if the string argument occurs one or more times as a substring | |
| * within this object, then the index of the first character of | |
| * the last such substring is returned. If it does not occur as | |
| * a substring, {@code -1} is returned. | |
| */ | |
| public int lastIndexOf(String str) { | |
| return sb.lastIndexOf(str); | |
| } | |
| /** | |
| * Returns the index within this string of the last occurrence of the | |
| * specified substring. The integer returned is the largest value <i>k</i> | |
| * such that: | |
| * <pre>{@code | |
| * k <= Math.min(fromIndex, this.length()) && | |
| * this.toString().startsWith(str, k) | |
| * }</pre> | |
| * If no such value of <i>k</i> exists, then -1 is returned. | |
| * | |
| * @param str the substring to search for. | |
| * @param fromIndex the index to start the search from. | |
| * @return the index within this sequence of the last occurrence of the | |
| * specified substring. | |
| */ | |
| public int lastIndexOf(String str, int fromIndex) { | |
| return sb.lastIndexOf(str, fromIndex); | |
| } | |
| /** | |
| * Causes this character sequence to be replaced by the reverse of | |
| * the sequence. If there are any surrogate pairs included in the | |
| * sequence, these are treated as single characters for the | |
| * reverse operation. Thus, the order of the high-low surrogates | |
| * is never reversed. | |
| * | |
| * Let <i>n</i> be the character length of this character sequence | |
| * (not the length in {@code char} values) just prior to | |
| * execution of the {@code reverse} method. Then the | |
| * character at index <i>k</i> in the new character sequence is | |
| * equal to the character at index <i>n-k-1</i> in the old | |
| * character sequence. | |
| * | |
| * <p>Note that the reverse operation may result in producing | |
| * surrogate pairs that were unpaired low-surrogates and | |
| * high-surrogates before the operation. For example, reversing | |
| * "\u005CuDC00\u005CuD800" produces "\u005CuD800\u005CuDC00" which is | |
| * a valid surrogate pair. | |
| * | |
| * @return a reference to this object. | |
| */ | |
| public StringBuilder reverse() { | |
| sb.reverse(); | |
| return this; | |
| } | |
| @Override | |
| public String toString() { | |
| return sb.toString(); | |
| } | |
| /** | |
| * Returns the length (character count). | |
| * | |
| * @return the length of the sequence of characters currently | |
| * represented by this object | |
| */ | |
| @Override | |
| public int length() { | |
| return sb.length(); | |
| } | |
| /** | |
| * Returns the current capacity. The capacity is the amount of storage | |
| * available for newly inserted characters, beyond which an allocation | |
| * will occur. | |
| * | |
| * @return the current capacity | |
| */ | |
| public int capacity() { | |
| return sb.capacity(); | |
| } | |
| /** | |
| * Ensures that the capacity is at least equal to the specified minimum. | |
| * If the current capacity is less than the argument, then a new internal | |
| * array is allocated with greater capacity. The new capacity is the | |
| * larger of: | |
| * <ul> | |
| * <li>The {@code minimumCapacity} argument. | |
| * <li>Twice the old capacity, plus {@code 2}. | |
| * </ul> | |
| * If the {@code minimumCapacity} argument is nonpositive, this | |
| * method takes no action and simply returns. | |
| * Note that subsequent operations on this object can reduce the | |
| * actual capacity below that requested here. | |
| * | |
| * @param minimumCapacity the minimum desired capacity. | |
| */ | |
| public void ensureCapacity(int minimumCapacity) { | |
| sb.ensureCapacity(minimumCapacity); | |
| } | |
| /** | |
| * Attempts to reduce storage used for the character sequence. | |
| * If the buffer is larger than necessary to hold its current sequence of | |
| * characters, then it may be resized to become more space efficient. | |
| * Calling this method may, but is not required to, affect the value | |
| * returned by a subsequent call to the {@link #capacity()} method. | |
| */ | |
| public void trimToSize() { | |
| sb.trimToSize(); | |
| } | |
| /** | |
| * Sets the length of the character sequence. | |
| * The sequence is changed to a new character sequence | |
| * whose length is specified by the argument. For every nonnegative | |
| * index <i>k</i> less than {@code newLength}, the character at | |
| * index <i>k</i> in the new character sequence is the same as the | |
| * character at index <i>k</i> in the old sequence if <i>k</i> is less | |
| * than the length of the old character sequence; otherwise, it is the | |
| * null character {@code '\u005Cu0000'}. | |
| * | |
| * In other words, if the {@code newLength} argument is less than | |
| * the current length, the length is changed to the specified length. | |
| * <p> | |
| * If the {@code newLength} argument is greater than or equal | |
| * to the current length, sufficient null characters | |
| * ({@code '\u005Cu0000'}) are appended so that | |
| * length becomes the {@code newLength} argument. | |
| * <p> | |
| * The {@code newLength} argument must be greater than or equal | |
| * to {@code 0}. | |
| * | |
| * @param newLength the new length | |
| * @throws IndexOutOfBoundsException if the | |
| * {@code newLength} argument is negative. | |
| */ | |
| public void setLength(int newLength) { | |
| sb.setLength(newLength); | |
| } | |
| /** | |
| * Returns the {@code char} value in this sequence at the specified index. | |
| * The first {@code char} value is at index {@code 0}, the next at index | |
| * {@code 1}, and so on, as in array indexing. | |
| * <p> | |
| * The index argument must be greater than or equal to | |
| * {@code 0}, and less than the length of this sequence. | |
| * | |
| * <p>If the {@code char} value specified by the index is a | |
| * <a href="Character.html#unicode">surrogate</a>, the surrogate | |
| * value is returned. | |
| * | |
| * @param index the index of the desired {@code char} value. | |
| * @return the {@code char} value at the specified index. | |
| * @throws IndexOutOfBoundsException if {@code index} is | |
| * negative or greater than or equal to {@code length()}. | |
| */ | |
| @Override | |
| public char charAt(int index) { | |
| return sb.charAt(index); | |
| } | |
| /** | |
| * Returns the character (Unicode code point) at the specified | |
| * index. The index refers to {@code char} values | |
| * (Unicode code units) and ranges from {@code 0} to | |
| * {@link #length()}{@code - 1}. | |
| * | |
| * <p> If the {@code char} value specified at the given index | |
| * is in the high-surrogate range, the following index is less | |
| * than the length of this sequence, and the | |
| * {@code char} value at the following index is in the | |
| * low-surrogate range, then the supplementary code point | |
| * corresponding to this surrogate pair is returned. Otherwise, | |
| * the {@code char} value at the given index is returned. | |
| * | |
| * @param index the index to the {@code char} values | |
| * @return the code point value of the character at the | |
| * {@code index} | |
| * @exception IndexOutOfBoundsException if the {@code index} | |
| * argument is negative or not less than the length of this | |
| * sequence. | |
| */ | |
| public int codePointAt(int index) { | |
| return sb.codePointAt(index); | |
| } | |
| /** | |
| * Returns the character (Unicode code point) before the specified | |
| * index. The index refers to {@code char} values | |
| * (Unicode code units) and ranges from {@code 1} to {@link | |
| * #length()}. | |
| * | |
| * <p> If the {@code char} value at {@code (index - 1)} | |
| * is in the low-surrogate range, {@code (index - 2)} is not | |
| * negative, and the {@code char} value at {@code (index - | |
| * 2)} is in the high-surrogate range, then the | |
| * supplementary code point value of the surrogate pair is | |
| * returned. If the {@code char} value at {@code index - | |
| * 1} is an unpaired low-surrogate or a high-surrogate, the | |
| * surrogate value is returned. | |
| * | |
| * @param index the index following the code point that should be returned | |
| * @return the Unicode code point value before the given index. | |
| * @exception IndexOutOfBoundsException if the {@code index} | |
| * argument is less than 1 or greater than the length | |
| * of this sequence. | |
| */ | |
| public int codePointBefore(int index) { | |
| return sb.codePointBefore(index); | |
| } | |
| /** | |
| * Returns the number of Unicode code points in the specified text | |
| * range of this sequence. The text range begins at the specified | |
| * {@code beginIndex} and extends to the {@code char} at | |
| * index {@code endIndex - 1}. Thus the length (in | |
| * {@code char}s) of the text range is | |
| * {@code endIndex-beginIndex}. Unpaired surrogates within | |
| * this sequence count as one code point each. | |
| * | |
| * @param beginIndex the index to the first {@code char} of | |
| * the text range. | |
| * @param endIndex the index after the last {@code char} of | |
| * the text range. | |
| * @return the number of Unicode code points in the specified text | |
| * range | |
| * @exception IndexOutOfBoundsException if the | |
| * {@code beginIndex} is negative, or {@code endIndex} | |
| * is larger than the length of this sequence, or | |
| * {@code beginIndex} is larger than {@code endIndex}. | |
| */ | |
| public int codePointCount(int beginIndex, int endIndex) { | |
| return sb.codePointCount(beginIndex, endIndex); | |
| } | |
| /** | |
| * Returns the index within this sequence that is offset from the | |
| * given {@code index} by {@code codePointOffset} code | |
| * points. Unpaired surrogates within the text range given by | |
| * {@code index} and {@code codePointOffset} count as | |
| * one code point each. | |
| * | |
| * @param index the index to be offset | |
| * @param codePointOffset the offset in code points | |
| * @return the index within this sequence | |
| * @exception IndexOutOfBoundsException if {@code index} | |
| * is negative or larger then the length of this sequence, | |
| * or if {@code codePointOffset} is positive and the subsequence | |
| * starting with {@code index} has fewer than | |
| * {@code codePointOffset} code points, | |
| * or if {@code codePointOffset} is negative and the subsequence | |
| * before {@code index} has fewer than the absolute value of | |
| * {@code codePointOffset} code points. | |
| */ | |
| public int offsetByCodePoints(int index, int codePointOffset) { | |
| return sb.offsetByCodePoints(index, codePointOffset); | |
| } | |
| /** | |
| * Characters are copied from this sequence into the | |
| * destination character array {@code dst}. The first character to | |
| * be copied is at index {@code srcBegin}; the last character to | |
| * be copied is at index {@code srcEnd-1}. The total number of | |
| * characters to be copied is {@code srcEnd-srcBegin}. The | |
| * characters are copied into the subarray of {@code dst} starting | |
| * at index {@code dstBegin} and ending at index: | |
| * <pre>{@code | |
| * dstbegin + (srcEnd-srcBegin) - 1 | |
| * }</pre> | |
| * | |
| * @param srcBegin start copying at this offset. | |
| * @param srcEnd stop copying at this offset. | |
| * @param dst the array to copy the data into. | |
| * @param dstBegin offset into {@code dst}. | |
| * @throws IndexOutOfBoundsException if any of the following is true: | |
| * <ul> | |
| * <li>{@code srcBegin} is negative | |
| * <li>{@code dstBegin} is negative | |
| * <li>the {@code srcBegin} argument is greater than | |
| * the {@code srcEnd} argument. | |
| * <li>{@code srcEnd} is greater than | |
| * {@code this.length()}. | |
| * <li>{@code dstBegin+srcEnd-srcBegin} is greater than | |
| * {@code dst.length} | |
| * </ul> | |
| */ | |
| public void getChars(int srcBegin, int srcEnd, char[] dst, int dstBegin) { | |
| sb.getChars(srcBegin, srcEnd, dst, dstBegin); | |
| } | |
| /** | |
| * The character at the specified index is set to {@code ch}. This | |
| * sequence is altered to represent a new character sequence that is | |
| * identical to the old character sequence, except that it contains the | |
| * character {@code ch} at position {@code index}. | |
| * <p> | |
| * The index argument must be greater than or equal to | |
| * {@code 0}, and less than the length of this sequence. | |
| * | |
| * @param index the index of the character to modify. | |
| * @param ch the new character. | |
| * @throws IndexOutOfBoundsException if {@code index} is | |
| * negative or greater than or equal to {@code length()}. | |
| */ | |
| public void setCharAt(int index, char ch) { | |
| sb.setCharAt(index, ch); | |
| } | |
| /** | |
| * Returns a new {@code String} that contains a subsequence of | |
| * characters currently contained in this character sequence. The | |
| * substring begins at the specified index and extends to the end of | |
| * this sequence. | |
| * | |
| * @param start The beginning index, inclusive. | |
| * @return The new string. | |
| * @throws StringIndexOutOfBoundsException if {@code start} is | |
| * less than zero, or greater than the length of this object. | |
| */ | |
| public String substring(int start) { | |
| return sb.substring(start); | |
| } | |
| /** | |
| * Returns a new character sequence that is a subsequence of this sequence. | |
| * | |
| * <p> An invocation of this method of the form | |
| * | |
| * <pre>{@code | |
| * sb.subSequence(begin, end)}</pre> | |
| * | |
| * behaves in exactly the same way as the invocation | |
| * | |
| * <pre>{@code | |
| * sb.substring(begin, end)}</pre> | |
| * | |
| * This method is provided so that this class can | |
| * implement the {@link CharSequence} interface. | |
| * | |
| * @param start the start index, inclusive. | |
| * @param end the end index, exclusive. | |
| * @return the specified subsequence. | |
| * | |
| * @throws IndexOutOfBoundsException | |
| * if {@code start} or {@code end} are negative, | |
| * if {@code end} is greater than {@code length()}, | |
| * or if {@code start} is greater than {@code end} | |
| * @spec JSR-51 | |
| */ | |
| @Override | |
| public CharSequence subSequence(int start, int end) { | |
| return sb.subSequence(start, end); | |
| } | |
| /** | |
| * Returns a new {@code String} that contains a subsequence of | |
| * characters currently contained in this sequence. The | |
| * substring begins at the specified {@code start} and | |
| * extends to the character at index {@code end - 1}. | |
| * | |
| * @param start The beginning index, inclusive. | |
| * @param end The ending index, exclusive. | |
| * @return The new string. | |
| * @throws StringIndexOutOfBoundsException if {@code start} | |
| * or {@code end} are negative or greater than | |
| * {@code length()}, or {@code start} is | |
| * greater than {@code end}. | |
| */ | |
| public String substring(int start, int end) { | |
| return sb.substring(start, end); | |
| } | |
| /** | |
| * Returns the locale set by the construction of this StringBuilder's formatter. | |
| * | |
| * <p> The {@link #appendFormat(Locale, String, Object...) format} method | |
| * for this object which has a locale argument does not change this value. | |
| * | |
| * @return {@code null} if no localization is applied, otherwise a | |
| * locale | |
| */ | |
| public Locale locale() { | |
| return formatter.locale(); | |
| } | |
| /** | |
| * Appends a formatted string to this object using the specified format string | |
| * and arguments. The locale used is System Default Locale. | |
| * | |
| * @param format | |
| * A format string as described in <a href="#syntax">Format string | |
| * syntax</a>. | |
| * | |
| * @param args | |
| * Arguments referenced by the format specifiers in the format | |
| * string. If there are more arguments than format specifiers, the | |
| * extra arguments are ignored. The maximum number of arguments is | |
| * limited by the maximum dimension of a Java array as defined by | |
| * <cite>The Java™ Virtual Machine Specification</cite>. | |
| * | |
| * @throws IllegalFormatException | |
| * If a format string contains an illegal syntax, a format | |
| * specifier that is incompatible with the given arguments, | |
| * insufficient arguments given the format string, or other | |
| * illegal conditions. For specification of all possible | |
| * formatting errors, see the <a href="#detail">Details</a> | |
| * section of the formatter class specification. | |
| * @return This StringBuilder | |
| */ | |
| public StringBuilder appendFormat(String format, Object... args) { | |
| formatter.format(format, args); | |
| return this; | |
| } | |
| /** | |
| * Appends a formatted string to this object using the | |
| * specified locale, format string, and arguments. | |
| * | |
| * @param l | |
| * The {@linkplain Locale locale} to apply during | |
| * formatting. If {@code l} is {@code null} then no localization | |
| * is applied. This does not change this object's locale that was | |
| * set during construction. | |
| * | |
| * @param format | |
| * A format string as described in <a href="#syntax">Format string | |
| * syntax</a> | |
| * | |
| * @param args | |
| * Arguments referenced by the format specifiers in the format | |
| * string. If there are more arguments than format specifiers, the | |
| * extra arguments are ignored. The maximum number of arguments is | |
| * limited by the maximum dimension of a Java array as defined by | |
| * <cite>The Java™ Virtual Machine Specification</cite>. | |
| * | |
| * @throws IllegalFormatException | |
| * If a format string contains an illegal syntax, a format | |
| * specifier that is incompatible with the given arguments, | |
| * insufficient arguments given the format string, or other | |
| * illegal conditions. For specification of all possible | |
| * formatting errors, see the <a href="#detail">Details</a> | |
| * section of the formatter class specification. | |
| * | |
| * @return This StringBuilder | |
| */ | |
| public StringBuilder appendFormat(Locale l, String format, Object... args) { | |
| formatter.format(l, format, args); | |
| return this; | |
| } | |
| } |
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