Multidimensional Array

Part 1.1.java

int[] array = new int[] { 4, 6, 7, -2, 9 };
for (int i = 0; i < 5; i++) {
   System.out.println("(" + i + ") = " + array[i]);
}

Part 1.2.java

(0) = 4
(1) = 6
(2) = 7
(3) = -2
(4) = 9

Part 2.1.java

int[][] array = new int[2][5];
array[0] = { 4, 6, 7, -2, 9 };
array[1] = { 5, 10, -2, 5, 2 };

Part 2.2.java

int[][] array = {
   { 4, 6, 7, -2, 9 }, // Array 1
   { 5, 10, -2, 5, 2 } // Array 2
};
// Loop through the first two arrays
for (int i = 0; i < 2; i++) {
  // Loop through every value in the array at index [i]
  for (int j = 0; j < 5; j++) {
    System.out.println("(" + i + ", " + j + ") = " + array[i][j]);
  }
}

Part 2.3.java

(0, 0) = 4
(0, 1) = 6
(0, 2) = 7
(0, 3) = -2
(0, 4) = 9
(1, 0) = 5
(1, 1) = 10
(1, 2) = -2
(1, 3) = 5
(1, 4) = 2

Part 3.1.java

int[][][] array = new int[2][2][2]
int[0] = {
   { 4, 6 },
   { 5, 10 }
};
int[1] = {
   { 7, 1 },
   { 9, -1 }
};

Part 3.2.java

// Computer screens are two dimensions, so we have to flatten the cube.
int[][][] array = {
   {
      { 4, 6 },
      { 5, 10 }
   },
   {
      { 7, 1 },
      { 9, -1 }
   }
};

// Select First Two-Dimensional
int[][] twoDimArray = array[0];

// Select First Array { 4, 6 }
int[] firstArray = twoDimArray[0];
// Or, you could do the follows
// int[] firstArray = array[0][0];

// Loop through first array
for (int i = 0; i < 2; i++) {
   System.out.println("(" + i + ") = " + firstArray[i]);
}

Part 3.3.java

(0) = 4
(1) = 6

Part 3.4.java

// I have flattened the numbers all the way to the first dimension (so a line of numbers). Don't mistake this, however,
// this array is still three-dimensions!
int[][][] array = {{{ 4, 6 }, { 5, 10 }}, {{ 7, 1 }, { 9, -1 }}};

// Select Second Two-Dimensions
int[][] twoDimArray = array[1];

// Loop through the two-dimensional array
for (int i = 0; i < 2; i++) {
   for (int j = 0; j < 2; j++) {
      System.out.println("(" + i + ", " + j + ") = " + twoDimArray[i][j]);
   }
}

Part 3.5.java

(0, 0) = 7
(0, 1) = 1
(1, 0) = 9
(1, 1) = -1

Part 3.6.java

int[][][] array = {{{ 4, 6 }, { 5, 10 }}, {{ 7, 1 }, { 9, -1 }}};

// Use three for loops for three dimensions!
for (int i = 0; i < 2; i++) {
   for (int j = 0; j < 2; j++) {
      for (int k = 0; k < 2; k++) {
         System.out.println("(" + i + ", " + j + ", " + k + ") = " + array[i][j][k]);
      }
   }
}

Part 3.7.java

(0, 0, 0) = 4
(0, 0, 1) = 6
(0, 1, 0) = 5
(0, 1, 1) = 10
(1, 0, 0) = 7
(1, 0, 1) = 1
(1, 1, 0) = 9
(1, 1, 1) = -1