[Java] How to find sum of all elements of an array?

Using reduce on stream we can calculate sum of all elements in an array. Following code shows how to do that.

import java.util.Arrays;

public class JavaArrays {
	public static void main(String[] args) {
		int[] array = { 1, 45, 34, 2 };
		int sum = Arrays.stream(array).reduce(0, (a, b) -> a + b);
		System.out.println(sum);
	}
}

Output:

82

Try this code online here https://onecompiler.com/java/3xmt8reyf