多线程-线程周期的几种状态

今天药忘吃喽~ 2022-12-22 04:38 191阅读 0赞

New 已创建但还未启动

Runnable 一旦调用start之后就是runnable(可运行) 对应了ready和running cpu在分配中也是runnable

Blocked 锁 进入synchronized修饰的代码块

Waiting

Timed Waiting

Terminated

public class NewRunnableTerminated implements Runnable{
        public static void main(String[] args) {
            Thread thread = new Thread(new NewRunnableTerminated());
            //NEW状态
            System.out.println(thread.getState());
            thread.start();
            //Runnable状态
            System.out.println(thread.getState());
            try {
                Thread.sleep(10);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            //Runnable状态，即使是正在运行，也是Runnable状态，而不是Running
            System.out.println(thread.getState());
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            //Terminated
            System.out.println(thread.getState());
        }
    
        @Override
        public void run() {
            for (int i = 0; i <10000 ; i++) {
                System.out.println(i);
            }
        }
    }

public class BlockedWaitingTimedWaiting implements Runnable{
        public static void main(String[] args) throws InterruptedException {
            BlockedWaitingTimedWaiting runnable = new BlockedWaitingTimedWaiting();
            Thread thread1 = new Thread(runnable);
            thread1.start();
            Thread.sleep(10);
            Thread thread2 = new Thread(runnable);
            thread2.start();
    
            //Time Waiting 因为正在执行的Thread.sleep(1000)
            System.out.println("线程1的状态："+thread1.getState());
            //Blocked 因为thread2想得到syn()的锁 却拿不到 因为线程1没有释放
            System.out.println("线程2的状态："+thread2.getState());
            Thread.sleep(1500);
            //打印出Waiting
            System.out.println("线程1的状态："+thread1.getState());
        }
    
        @Override
        public void run() {
            syn();
        }
        private synchronized void syn(){
            try {
                Thread.sleep(1000);
                wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }