How do you declare an array in java?

Question:

How do you declare an array in java?

Answer:

Here is an example on how to declare and initial arrays.

Code:

import java.util.*;
 
public class MyArray {
   public static void main(String[] args) {
 
      int[] array;
 
      // declare an array (not initialized)
      int[] array1 = new int[3];
      System.out.println("array1: " + Arrays.toString(array1));
 
      // declare and initialize
      int[] array2 = {1,2,3};
      System.out.println("array2: " + Arrays.toString(array2));
 
      // declare and initialize
      int[] array3 = new int[]{1,2,3};
      System.out.println("array3: " + Arrays.toString(array3));
 
 
      // two dimensional array (not initialized)
      int[][] array4 = new int[4][2];
      System.out.println("array4: " + Arrays.deepToString(array4));
 
      // two dimensional array and initialized
      int[][] array5 = { {1,2}, {1,2}, {1,2} ,{1,2}, {1,2} };
      System.out.println("array5: " + Arrays.deepToString(array5));
 
   }
}

Output:

$ java MyArray 
array1: [0, 0, 0]
array2: [1, 2, 3]
array3: [1, 2, 3]
array4: [[0, 0], [0, 0], [0, 0], [0, 0]]
array5: [[1, 2], [1, 2], [1, 2], [1, 2], [1, 2]]