Java多线程04-生命周期

线程共有六种生命周期，分别是：

• New（新创建）
• Runnable （可运行）
• Blocked （被阻塞）
• Waiting (等待)
• Timed Waiting （记时等待）
• Terminated （已终止）

六大生命周期转换图如下：

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线程状态变化案例

演示NEW、RUNNABLE、Terminated状态：

public class NewRunnableTerminated implements Runnable{

    public static void main(String[] args) {
        Thread thread = new Thread(new NewRunnableTerminated());
        System.out.println(thread.getState());
        thread.start();
        System.out.println(thread.getState());
        try {
            Thread.sleep(2);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        //打印出RUNNABLE的状态，即使是正在运行，也是RUNNABLE，而不是RUNNING
        System.out.println(thread.getState());
        try {
            Thread.sleep(100);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        //打印出TERMINATED状态
        System.out.println(thread.getState());

    }

    @Override
    public void run() {
        for (int i = 0; i < 1000; i++) {
            System.out.println(i);
        }
    }
}

演示Blocked、Waiting、TimedWaiting状态：

public class NewRunnableTerminated implements Runnable{

    public static void main(String[] args) {
        Thread thread = new Thread(new NewRunnableTerminated());
        System.out.println(thread.getState());
        thread.start();
        System.out.println(thread.getState());
        try {
            Thread.sleep(2);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        //打印出RUNNABLE的状态，即使是正在运行，也是RUNNABLE，而不是RUNNING
        System.out.println(thread.getState());
        try {
            Thread.sleep(100);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        //打印出TERMINATED状态
        System.out.println(thread.getState());

    }

    @Override
    public void run() {
        for (int i = 0; i < 1000; i++) {
            System.out.println(i);
        }
    }
}