Custom StringBuilder Class

CStringBuilder.java

import java.util.LinkedList;

public class CStringBuilder {
 
	private final StringBuilder masterBuilder = new StringBuilder();

	public CStringBuilder() {
	}
 
	public CStringBuilder(char[] str) {
		this();
		addString(str);
	}

	public CStringBuilder(String str) {
		this();
		addString(str);
	},


	/*
	 *
	 * Special methods for unique characters
	 *
	 */


	public CStringBuilder cr(int carriageReturnCount) {
		addString("\n", carriageReturnCount);
		return this;
	}

	public CStringBuilder cr() {
		addString("\n");
		return this;
	}

	public CStringBuilder qt(int quoteCount) {
		addString("\"", quoteCount);
		return this;
	}

	public CStringBuilder qt() {
		addString("\"");
		return this;
	}

	public CStringBuilder qm(int questionMarkCount) {
		addString("?",questionMarkCount);
		return this;
	}

	public CStringBuilder qm() {
		addString("?");
		return this;
	}

	public CStringBuilder c(int colonCount) {
		addString(":",colonCount);
		return this;
	}

	public CStringBuilder c() {
		addString(":");
		return this;
	}

	public CStringBuilder s(int semiColonCount) {
		addString(";",semiColonCount);
		return this;
	}

	public CStringBuilder s() {
		addString(";");
		return this;
	}

	public CStringBuilder p(int periodCount) {
		addString(".",periodCount);
		return this;
	}

	public CStringBuilder p() {
		addString(".");
		return this;
	}

	public CStringBuilder t(int tabCount) {
		addString("\t",tabCount);
		return this;
	}

	public CStringBuilder t() {
		addString("\t");
		return this;
	}

	public CStringBuilder sp(int spacesCount) {
		addString(" ",spacesCount);
		return this;
	}

	public CStringBuilder sp() {
		addString(" ");
		return this;
	}

	public CStringBuilder d(int dashCount) {
		addString("-",dashCount);
		return this;
	}

	public CStringBuilder d() {
		addString("-");
		return this;
	}

	public CStringBuilder e(int equalCount) {
		addString("=",equalCount);
		return this;
	}

	public CStringBuilder e() {
		addString("=");
		return this;
	}

	public CStringBuilder u(int underlineCount) {
		addString("_",underlineCount);
		return this;
	}

	public CStringBuilder u() {
		addString("_");
		return this;
	}

	public CStringBuilder po(int parenthesisOpenCount) {
		addString("(",parenthesisOpenCount);
		return this;
	}

	public CStringBuilder po() {
		addString("(");
		return this;
	}

	public CStringBuilder fs(int forwardSlashCount) {
		addString("/",forwardSlashCount);
		return this;
	}

	public CStringBuilder fs() {
		addString("/");
		return this;
	}

	public CStringBuilder amp(int ampersandCount) {
		addString("&",ampersandCount);
		return this;
	}

	public CStringBuilder amp() {
		addString("&");
		return this;
	}

	public CStringBuilder pc(int parenthesisCloseCount) {
		addString(")",parenthesisCloseCount);
		return this;
	}

	public CStringBuilder pc() {
		addString(")");
		return this;
	}

	public CStringBuilder cm(int commaCount) {
		addString(",",commaCount);
		return this;
	}

	public CStringBuilder cm() {
		addString(",");
		return this;
	}

	public CStringBuilder comma(int count) {
		addString(",",count);
		return this;
	}

	public CStringBuilder comma() {
		addString(",");
		return this;
	}

	public CStringBuilder cbo(int curleyBracketOpenCount) {
		addString("{",curleyBracketOpenCount);
		return this;
	}

	public CStringBuilder cbo() {
		addString("{");
		return this;
	}

	public CStringBuilder cbc(int curleyBracketCloseCount) {
		addString("}",curleyBracketCloseCount);
		return this;
	}

	public CStringBuilder cbc() {
		addString("}");
		return this;
	}

	public CStringBuilder bo(int bracketOpenCount) {
		addString("[",bracketOpenCount);
		return this;
	}

	public CStringBuilder bo() {
		addString("[");
		return this;
	}

	public CStringBuilder bc(int bracketCloseCount) {
		addString("]",bracketCloseCount);
		return this;
	}

	public CStringBuilder bc() {
		addString("]");
		return this;
	}

	public CStringBuilder pp(int pipeCount) {
		addString("|",pipeCount);
		return this;
	}

	public CStringBuilder pp() {
		addString("|");
		return this;
	}

	public CStringBuilder pi(int piCount) {
		addString((char) 960, piCount);
		return this;
	}

	public CStringBuilder pi() {
		addString((char) 960);
		return this;
	}

	public CStringBuilder al(String line){
		addString(line + "\n");
		return this;
	}

	public CStringBuilder apple(int appleSymbolCount) {
		addString((char) 63743, appleSymbolCount);
		return this;
	}

	public CStringBuilder apple() {
		addString((char) 63743);
		return this;
	}

	public CStringBuilder sa(int count) {
		addString((char) 945, count);
		return this;
	}

	public CStringBuilder sa() {
		addString((char) 945);
		return this;
	}

	public CStringBuilder sb(int count) {
		addString((char) 946, count);
		return this;
	}

	public CStringBuilder sb() {
		addString((char) 946);
		return this;
	}

	public CStringBuilder sl(int count) {
		addString((char) 955, count);
		return this;
	}

	public CStringBuilder sl() {
		addString((char) 955);
		return this;
	}

	public CStringBuilder sm(int count) {
		addString((char) 956, count);
		return this;
	}

	public CStringBuilder sm() {
		addString((char) 956);
		return this;
	}

	public CStringBuilder so(int count) {
		addString((char) 937, count);
		return this;
	}

	public CStringBuilder so() {
		addString((char) 937);
		return this;
	}

	public CStringBuilder ss(int count) {
		addString((char) 8721);
		return this;
	}

	public CStringBuilder ss() {
		addString((char) 8721);
		return this;
	}

	public CStringBuilder append(String str) {
		addString(str);
		return this;
	}

	public CStringBuilder a(String str, int count) {
		addString(str,count);
		return this;
	}

	public CStringBuilder a(String str) {
		addString(str);
		return this;
	}


	/*
	 *
	 * User Interaction Methods
	 *
	 */

	public CStringBuilder append(Object item) {
		addString(item);
		return this;
	}

	public CStringBuilder a(Object item) {
		addString(item);
		return this;
	}

	public CStringBuilder append(char[] ... strChar) {
		for (char[] c : strChar) {
			addString(c);
		}
		return this;
	}

	public CStringBuilder a(char[] ... strChar) {
		for (char[] c : strChar) {
			addString(c);
		}
		return this;
	}

	public CStringBuilder append(String ... text) {
		for(String str : text) {
			addString(str);
		}
		return this;
	}

	public CStringBuilder a(String ... text) {
		for(String str : text) {
			addString(str);
		}
		return this;
	}

	public CStringBuilder append(char[] chr, int count) {
		addString(new String(chr),count);
		return this;
	}

	public CStringBuilder a(char[] chr, int count) {
		addString(new String(chr),count);
		return this;
	}

	public CStringBuilder append(Object ... object) {
		for(Object obj : object) {
			addString(obj);
		}
		return this;
	}

	public CStringBuilder a(Object ... object) {
		for(Object obj : object) {
			addString(obj);
		}
		return this;
	}

	public CStringBuilder append(Object item, int count) {
		addString(item,count);
		return this;
	}

	public CStringBuilder a(Object item, int count) {
		addString(item,count);
		return this;
	}

	public CStringBuilder append(char[] str) {
		addString(str);
		return this;
	}

	public CStringBuilder a(char[] str) {
		addString(str);
		return this;
	}

	public CStringBuilder append(LinkedList<char[]> list) {
		for (char[] c : list) {
			addString(c);
		}
		return this;
	}

	public CStringBuilder a(LinkedList<char[]> list) {
		for (char[] c : list) {
			addString(c);
		}
		return this;
	}


	/*
	 *
	 * Private Methods
	 *
	 */


	private void addString(String str, int count) {
		for (int x = 0; x < count; x++) {
			addStringFinal(str);
		}
	}

	private void addString(Object ch, int count) {
		String newString = ch.toString();
		addString(newString,count);
	}

	private void addString(Object ch) {
		String newString = ch.toString();
		addStringFinal(newString);
	}

	private void addString(String str) {
		addStringFinal(str);
	}

	private void addStringFinal(String str) {
		masterBuilder.append(str);
	}

	public Integer getLength() {
		return masterBuilder.toString().length();
	}

	@Override
	public String toString() {
		return masterBuilder.toString();
	}


	/*
	 *
	 * Public static methods to get information about what the Class can do
	 *
	 */


	public static void printCommands() {
		CStringBuilder csb = new CStringBuilder();
		csb.a(" qt = \"").t(2).a("cbo = {").cr();
		csb.a(" qm = ?").t(2).a("cbc = }").cr();
		csb.a("  c = :").t(2).a(" bo = [").cr();
		csb.a("  s = ;").t(2).a(" bc = ]").cr();
		csb.a("  t = tab").t().a(" pp = |").cr();
		csb.a(" sp = space").t().a(" pi = " + (char) 960).cr();
		csb.a("  d = -").t(2).a(" apple = " + (char) 63743).cr();
		csb.a("  e = =").t(2).a(" sa = " + (char) 945).cr();
		csb.a("  u = _").t(2).a(" sb = " + (char) 946).cr();
		csb.a(" po = (").t(2).a(" sl = " + (char) 955).cr();
		csb.a(" pc = )").t(2).a(" sm = " + (char) 956).cr();
		csb.a(" fs = /").t(2).a(" so = " + (char) 937).cr();
		csb.a("amp = &").t(2).a(" ss = " + (char) 8721).cr();
		csb.a(" cm = ,").cr();
		System.out.println(csb.toString());
	}

	public static void getOptions() {printCommands();}

	public static void printOutOptions() {printCommands();}
}

FileChecksum.java

import picocli.CommandLine.Command;
import picocli.CommandLine.Option;
import picocli.CommandLine.Parameters;
import java.io.File;
import java.math.BigInteger;
import java.nio.file.Files;
import java.security.MessageDigest;
import java.util.concurrent.Callable;

@Command(name = "checksum",
    description = "Prints the checksum (MD5 by default) of a file to STDOUT.",
    version = "checksum 1.0",
    synopsisHeading = "Usage: ",
    parameterListHeading = "%nParameters:%n",
    optionListHeading = "%nOptions:%n",
    mixinStandardHelpOptions = true,
    footer = "%nDeveloper Contact: @|underline [email protected]|@")
public class CheckSum implements Callable<Void> {
    
    @Option(names = {"-a", "--algorithm"},
        description = "MD5, SHA-1, SHA-256, ...")
    private String algorithm = "MD5";
    
    @Parameters(index = "0",
        description = "The file whose checksum to calculate.")
    private File file;
    
    @Override
    public Void call() throws Exception {
        byte[] fileContents = Files.readAllBytes(file.toPath());
        byte[] digest = MessageDigest.getInstance(algorithm).digest(fileContents);
        System.out.printf("%0" + (digest.length * 2) + "x%n", new BigInteger(1, digest));
        return null;
    }
}

I like StringBuilder, but I don't like the cumbersome use of .append("") so I found this write up on making a custom String Builder Class and I created this one...

I made this for myself but I found it to be so handy, I thought maybe someone else could benefit from it...

Handy Features: all of these can be repeated x number of times by adding the count, or in the case of .a you add a comma then the count like this

Examples

Method	What Gets Appended
.a(myString,5)	would repeat append your string 5 times.
.a(char[],x)	append a char array x number of times
.a(char[], char[])	apend two unique char[]'s with one command
.a(char[], char[], char[])	Or three different ones...
.a(LinkedList<char[]>)	OR, build your char[]'s into a linked list and it will iterate through them and append each one in order (using default iteration order).
.t()	appends a single tab
.t(5)	appends 5 consecutive tabs ...

You get the idea ...

Method	What Gets Appended
.a	Short for append
.a("",int)	Repeat your append by the int number.
.c()	Colon :
.cm()	Comma ,
.cr()	Return ( \n )
.d()	Dash -
.e()	Equal sign =
.s()	Semicolon ;
.sp()	Space
.q()	Quotation Mark "
.t()	Tab

Method	Special Characters
.pp	Pipe |
.cbo	Curley Braces Open {
.cbc	Curley Braces Closed }
.po	Parenthese Open (
.pc	Parenthese Closed )
.u()	Underscore _
.e()	Equal Sign =

Scientific Notations all begin with s

Method	What Gets Appended
.sa()	Alpha α
.sb()	Beta β
.sl()	Lamda λ
.sm()	Mu μ
.so()	Omega Ω
.ss()	Sigma ∑

Miscellaneous

Method	Description
.pi()	append pi π
.al()	append apple logo 