两（多）个线程交替执行最优解

import java.util.concurrent.locks.ReentrantLock;
public class LockDemo {
    static ReentrantLock lock = new ReentrantLock(true); // 定义公平锁,用来是线程1和线程2交替执行
    public static void run(int count) {
        for (int i = 0; i < count; i++) {
            lock.lock(); // 获取锁
            try {
                System.out.println(Thread.currentThread().getName() + "第" + i + "次执行");
            } finally {
                lock.unlock(); // 释放锁
            }
        }
    }
    public static void main(String[] args) {
        for (int i = 0; i < 10; i++)
            new Thread(() -> run(10), "线程" + i + "-->").start();
    }
}

package com.gzz.config;

import java.util.Random;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.locks.ReentrantLock;

import lombok.extern.slf4j.Slf4j;

@Slf4j
public class LockDemo {
    static ReentrantLock lock = new ReentrantLock(true); // 定义公平锁,用来是线程1和线程2交替执行
    static Random random = new Random();

    static void run(int count) {
        for (int i = 0; i < count; i++)
            try {
                lock.lock();
                int second = random.nextInt(50);
                TimeUnit.MILLISECONDS.sleep(second);// 不论执行时间是多少,执行机会是一样的
                log.info("{}:第{}次执行,用了{}毫秒!", Thread.currentThread().getName(), i, second);
            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                lock.unlock();
            }
    }

    public static void main(String[] args) {
        for (int i = 0; i < 5; i++)
            new Thread(() -> run(10), "线程" + i).start();
    }
}