Java – Iterate over Array indexes using IntStream

Streams of elements usually do not allow access to the index value of the current item. To iterate over an array or ArrayList while having access to indexes, use IntStream.range(start, endExclusive).

 

package com.pwn.stream;

import java.util.stream.IntStream;

public class IntStreamToIterateOverIndexes {

	public static void main(String[] args) {
		String[] fruitList = { "Apple", "Banana", "Orange", "Kiwi",
				"Grape" };
		IntStream.range(0, fruitList.length).mapToObj(
				i -> String.format("%d) %s", i + 1, fruitList[i]))
				.forEach(System.out::println);

	}

}

1) Apple
2) Banana
3) Orange
4) Kiwi
5) Grape

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