Java FAQ: How do you create an array of ints?

Here are several Java array examples in one class. The method named intArrayExample shows how an int array is typically created and populated. To demonstrate the similiarity, the method named stringArrayExample shows how a String array is typically created and populated. Finally, the method named intArrayExample2 shows a different way of creating an int array, this time creating and populating the array in one step.

Here's the sample class:

package com.devdaily.javasamples;

/**
 * Demonstrates several examples of creating arrays in Java.
 * Created by Alvin Alexander, http://devdaily.com.
 */
public class JavaArrayExample
{

  public static void main(String[] args)
  {
    new JavaArrayExample();
  }

  public JavaArrayExample()
  {
    intArrayExample();
    stringArrayExample();
    intArrayExample2();
  }

  private void intArrayExample()
  {
    int[] intArray = new int[3];
    intArray[0] = 1;
    intArray[1] = 2;
    intArray[2] = 3;
    System.out.println("intArray output");
    for (int i=0; i<intArray.length; i++)
    {
      System.out.println(intArray[i]);
    }
  }

  private void stringArrayExample()
  {
    String[] stringArray = new String[3];
    stringArray[0] = "a";
    stringArray[1] = "b";
    stringArray[2] = "c";
    System.out.println("stringArray output");
    for (int i=0; i<stringArray.length; i++)
    {
      System.out.println(stringArray[i]);
    }
  }

  private void intArrayExample2()
  {
    int[] intArray = new int[] {4,5,6,7,8};
    System.out.println("intArray output (version 2)");
    for (int i=0; i<intArray.length; i++)
    {
      System.out.println(intArray[i]);
    }
  }

}