package com.tuling.tim.common;

import org.junit.Test;

import java.time.LocalDate;
import java.time.LocalTime;

/**
 * @since JDK 1.8
 */
public class CommonTest {


    @Test
    public void test2() {
        System.out.println(LocalDate.now().toString());
        System.out.println(LocalTime.now().withNano(0).toString());
    }

    @Test
    public void test() throws InterruptedException {


        System.out.println(is2(9));

        System.out.println(Integer.bitCount(64 - 1));

        int target = 1569312600;
        int mod = 64;
        System.out.println(target % mod);

        System.out.println(mod(target, mod));
        System.out.println("============");

        System.out.println(cycleNum(256, 64));

        cycle();
    }


    private int mod(int target, int mod) {
        // equals target % mod
        return target & (mod - 1);
    }

    private int cycleNum(int target, int mod) {
        //equals target/mod
        return target >> Integer.bitCount(mod - 1);
    }

    private boolean is2(int target) {
        if (target < 0) {
            return false;
        }

        int value = target & (target - 1);
        if (value != 0) {
            return false;
        }

        return true;
    }


    private void cycle() throws InterruptedException {
        int index = 0;
        /*while (true){
            System.out.println("=======" + index);

            if (++index > 63){
                index = 0 ;
            }
            TimeUnit.MILLISECONDS.sleep(200);
        }*/
    }

}
