Code Trick

^=

对于任意一个 int 或 long 类型的 value 值来说，进行 value ^= value 操作，本质是都是执行 value = 0 的操作。

package sample;

public final class HelloWorld {
    public void test(int value) {
        value ^= value;
        System.out.println(value);
    }
}

import sample.HelloWorld;

public class HelloWorldRun {
    public static void main(String[] args) throws Exception {
        HelloWorld instance = new HelloWorld();
        for (int i = 0; i < 10; i++) {
            instance.test(i);
        }
    }
}

Output:

0
0
0
0
0
0
0
0
0
0

branchless

package sample;

public final class HelloWorld {
    public int test(int a, int b) {
        if (a < b) {
            return a;
        }
        else {
            return b;
        }
    }
}

import sample.HelloWorld;

public class HelloWorldRun {
    public static void main(String[] args) throws Exception {
        HelloWorld instance = new HelloWorld();
        int value = instance.test(5, 10);
        System.out.println(value);
    }
}

package sample;

public final class HelloWorld {
    public int test(int a, int b) {
        return a * ((a < b) ? 1 : 0) + b * (b <= a ? 1 : 0);
    }
}