怎么优化这个java的速度啊

Question

import java.util.*;

public class Main {

public static void main(String[] args) {
    Scanner scanner = new Scanner(System.in);
    int index = scanner.nextInt();

    int a[] = new int[index];

    Scanner scanner2 = new Scanner(System.in);
    for (int i = 0; i < a.length; i++) {
        a[i] = scanner2.nextInt();
    }

    int max = findMaxByStream(a);
    System.out.println(max);
}

private static int findMaxByStream(int[] a) {
    return Arrays.stream(a).max().getAsInt();
}

}

Answer 1

每次输入后就用新值和原有的最大值比对一下，就不需要在输入完成后再比对整个数组了

public static void main(String[] args) {
    Scanner scanner = new Scanner(System.in);
    int index = scanner.nextInt();
    int max = Integer.MIN_VALUE;
 
    int a[] = new int[index];
 
    Scanner scanner2 = new Scanner(System.in);
    for (int i = 0; i < a.length; i++) {
        a[i] = scanner2.nextInt();
        max = max > a[i] ? max : a[i];
    }
 
    System.out.println(max);
}