多线程面试题-线程通信

• 线程间通信：两个线程交替打印
• 第一个线程打印1-26，第二个线程打印A-Z
• 即最终结果为：1A2B3C…26Z

package com.example.mca.thread;

import java.util.concurrent.locks.LockSupport;

/**
 * 线程间通信：两个线程交替打印
 * 第一个线程打印1-26，第二个线程打印A-Z
 * 即最终结果为：1A2B3C......26Z
 */
public class ThreadCommunication {

    static Thread t1 = null;
    static Thread t2 = null;


    public static void main(String[] args) {

        t1 = new Thread(() -> {
            for (int i = 0; i < 26; i++) {
                System.out.print(i + 1);
                LockSupport.unpark(t2);
                LockSupport.park(t1);
            }
            System.out.println("\n~~~~~~~ t1 execute over ~~~~~~~");
            LockSupport.unpark(t2);
        });

        t2 = new Thread(() -> {
            for (int i = 0; i < 26; i++) {
                if (i == 0) {
                    LockSupport.park(t2);
                }
                System.out.print((char) (65 + i) + " ");//A对应的ASCII码为65
                LockSupport.unpark(t1);
                LockSupport.park(t2);
            }
            System.out.println("~~~~~~~ t2 execute over ~~~~~~~");
            LockSupport.unpark(t1);
        });

        t1.start();
        t2.start();
    }
}

标签：System,面试题,打印,t2,LockSupport,t1,线程,多线程
来源： https://blog.csdn.net/qq_17611883/article/details/115682012