java 8 sum of list code example

Example 1: sum of arraylist java 8

int total = numbers.stream().mapToInt(i -> i.intValue()).sum();
		System.out.print(total);

Example 2: sum of list java

double sum = 0;
for(int i = 0; i < m.size(); i++)
    sum += m.get(i);
return sum;