How to find the largest number in an array in Java?

April 23, 2021

To find the largest number in an array in Java, call the Stream.max method, then getAsInt.

1. With streams

The shortest way is to use streams:

int[] array = new int[] { 400, 55, 3, 90 };

int max = Arrays.stream(array).max().getAsInt();

System.out.println(max); // 400

2. With a loop

Another way is to use a plain for loop:

int[] array = new int[] { 400, 55, 3, 90 };
int max = Integer.MIN_VALUE;

for (int i = 0; i < array.length; i++) {
  if (array[i] > max) {
    max = array[i];
  }
}

System.out.println(min); // 400