Java Array – For Loop

Java Array is a collection of elements stored in a sequence. You can iterate over the elements of an array in Java using any of the looping statements.

In this tutorial, we will learn how to use Java For Loop to iterate over the elements of Java Array.

Example 1 – Iterate Java Array using For Loop

In the following program, we initialize an array, and traverse the elements of array using for loop. We start with an index of zero, condition that index is less than the length of array, and increment index as update expression in for loop.

During each iteration, we have access to index and the array itself, using which we can access an element from starting in each of the iterations.

Java Program

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public class ArrayExample {
	public static void main(String[] args) {
		int[] numbers = {2, 4, 6, 8, 10};
		for (int index=0; index < numbers.length; index++) {
			System.out.println(numbers[index]);
		}
	}
}

Output

2
4
6
8
10

Example 2 – Iterate Java Array using Enhanced For Loop

In the following program, we initialize an array, and traverse the elements using enhanced for loop.

Java Program

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public class ArrayExample {
	public static void main(String[] args) {
		int[] numbers = {2, 4, 6, 8, 10};
		for (int n: numbers) {
			System.out.println(n);
		}
	}
}

During each iteration of for loop, you can access this element using the variable name you provided in the definition of for loop. In the above program, we used the variable n, to store current element during this iteration.

Output

2
4
6
8
10

Example 3 – Iterate Java Array from End to Start using For Loop

You can also traverse through an array from end to start. All you have to do is initialize the index that points to last element of the array, decrement it during each iteration, and have a condition that index is greater than or equal to zero.

In the following program, we initialize an array, and traverse the elements of array from end to start using for loop.

Java Program

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public class ArrayExample {
	public static void main(String[] args) {
		int[] numbers = {2, 4, 6, 8, 10};
		for (int index = numbers.length -1; index >= 0; index--) {
			System.out.println(numbers[index]);
		}
	}
}

Output

10
8
6
4
2

Conclusion

In this Java Tutorial, we learned how to iterate or traverse through a Java Array using For Loop.