Java - Loop Through an Array

Last Updated : 02 Dec, 2024

In Java, looping through an array or Iterating over arrays means accessing the elements of the array one by one. We have multiple ways to loop through an array in Java.

Example 1: Here, we are using the most simple method i.e. using for loop to loop through an array.

Java

// Java program to loop through 
// an array using for loop
import java.io.*;

class GFG {
  
    public static void main(String args[]){
      
      	// taking an array
        int a[] = { 1, 2, 3, 4, 5 };
        int i, x;

        // Iterating over an array
        for (i = 0; i < a.length; i++) {

            // accessing each element of array
            x = a[i];
            System.out.print(x + " ");
        }
    }
}

Output

1 2 3 4 5

Example 2: The another method is using enhanced for loop to iterate over arrays in Java. It is same as for loop where rather than using index we directly iterate on elements.

Java

// Java Program to iterate over arrays
// using enhanced for loop
import java.io.*;

public class GFG {
    public static void main(String[] args)
    {
        // Array Created
        int a[] = { 1, 2, 3, 4, 5 };

        // Iterating using for-each or
        // enhanced for loop
        for (int i : a)
            System.out.print(i + " ");
    }
}

Output

1 2 3 4 5

Example 3: We can also loop through an array using while loop. Although there is not much of a difference in for and while loop in this condition. While loop is considered effective when the increment of the value depends upon some of the condition.

Java

// Java program to iterate over an array
// using while loop
import java.io.*;

class Main {
    public static void main(String args[])
    {

        // taking an array
        int a[] = { 1, 2, 3, 4, 5 };
        int i = 0;

        // Iterating over an array
        // using while loop
        while (i < a.length) {

            // accessing each element of array
            System.out.print(a[i] + " ");

            i++;
        }
    }
}

Output

1 2 3 4 5

Example 4: We can also use the Arrays.stream() method. This Method is used to convert an Array into stream and then we can traverse stream using forEach() loop.

Java

// Java Program to iterate over arrays
// using Arrays.stream() Method
import java.util.*;

public class GFG {
    public static void main(String[] args)
    {
        // Array Created
        int[] a = { 1, 2, 3, 4, 5 };

        // Iteration using Arrays.stream()
        Arrays.stream(a).forEach(i -> System.out.print(i + " "));
    }
}

Output

1 2 3 4 5

Java - Loop Through an Array

Nikita tiwari

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