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package class03;
public class Code08_GetMax {
// 求arr中的最大值
public static int getMax(int[] arr) {
return process(arr, 0, arr.length - 1);
}
// arr[L..R]范围上求最大值 L ... R N
public static int process(int[] arr, int L, int R) {
// arr[L..R]范围上只有一个数，直接返回，base case
if (L == R) {
return arr[L];
// L...R 不只一个数
// mid = (L + R) / 2
int mid = L + ((R - L) >> 1); // 中点 1
int leftMax = process(arr, L, mid);
int rightMax = process(arr, mid + 1, R);
return Math.max(leftMax, rightMax);
