全力で釣られてみる

int[] a = {2, -3, 5, 10, 1, -7, 3, 7};
int max = 0, min = 0;

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