前言：
此刻小伙伴们对“java线程输出”大约比较着重，姐妹们都需要知道一些“java线程输出”的相关知识。那么小编也在网络上汇集了一些有关“java线程输出””的相关文章，希望姐妹们能喜欢，姐妹们快快来了解一下吧！面试题：现在有两个线程t1和t2，t1输出1，t2输出2，两个线程同时启动，怎么让输出结果永远都是21；
1、wait / notify方式
package cn.itcast.n3;public class Test3 { private static final Object obj = new Object(); private static boolean t2run = false; public static void main(String[] args) { Thread t1 = new Thread(() -> { synchronized (obj) { while (!t2run) { try { obj.wait(); } catch (InterruptedException e) { e.printStackTrace(); } } System.out.println(Thread.currentThread().getName() + "线程打印：1"); } },"t1") ; Thread t2 = new Thread(() -> { synchronized (obj) { System.out.println(Thread.currentThread().getName() + "线程打印：2"); t2run = true; obj.notify(); } },"t2") ; t1.start(); t2.start(); }}2、await / signal方式
package cn.itcast.n3;import java.util.concurrent.locks.Condition;import java.util.concurrent.locks.ReentrantLock;public class Test4 { private static ReentrantLock lock = new ReentrantLock(); private static boolean t2run = false; public static void main(String[] args) { Condition condition1 = lock.newCondition(); Thread t1 = new Thread(() -> { lock.lock(); try { while (!t2run) { try { condition1.await(); } catch (InterruptedException e) { e.printStackTrace(); } } System.out.println(Thread.currentThread().getName() + "线程输出 1"); } finally { lock.unlock(); } },"t1") ; Thread t2 = new Thread(() -> { lock.lock(); try { System.out.println(Thread.currentThread().getName() + "线程输出 2"); t2run = true; condition1.signal(); } finally { lock.unlock(); } },"t2") ; t1.start(); t2.start(); }}3、park / unpark方式
package cn.itcast.n3;import java.util.concurrent.locks.LockSupport;public class Test5 { public static void main(String[] args) { Thread t1 = new Thread(() -> { LockSupport.park(); System.out.println(Thread.currentThread().getName() + "线程输出 1"); },"t1") ; Thread t2 = new Thread(() -> { System.out.println(Thread.currentThread().getName() + "线程输出 2"); LockSupport.unpark(t1); },"t2") ; t1.start(); t2.start(); }} 版权声明：
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标签： #java线程输出
