5 Different Ways To Sum All Elements in Array Java

Approach 1:

1)Take Stream Object on Array then apply sum method directly.

 int[] numbers = new int[]{2,1,3,5,6,7,8,9};
 int sum1 = Arrays.stream(numbers).sum();

Approach 2:

2)Take Stream Object on array then apply reduce method by passing lambda expression.

int[] numbers = new int[]{2,1,3,5,6,7,8,9};
int sum2 = Arrays.stream(numbers)
                .reduce((x,y)>x+y).getAsInt();

Approach 3 :

3) Take Stream Stream object based on array then apply reduce method by passing method referencing in java

int[] numbers = new int[]{2,1,3,5,6,7,8,9};
int sum3  =Arrays.stream(numbers)
        .reduce(Integer::sum).getAsInt();

Approach 4:

4) Create IntStream from array then apply sum method.

int[] numbers = new int[]{2,1,3,5,6,7,8,9};
int sum4 =IntStream.of(numbers).sum();

Approach 5:

5) Create Summary Statistics from streams then apply sum method.

int[] numbers = new int[]{2,1,3,5,6,7,8,9};
IntSummaryStatistics intSummaryStatistics = Arrays.stream(numbers).summaryStatistics();
	 Long sum5 = intSummaryStatistics.getSum();

Here is the full tutorial:

https://youtu.be/diCbcehdQ0k