线程终止

通过 stop 终止

已被 jdk 弃用，它可能导致线程安全问题。

通过 interrupt 终止

推荐使用的方式。

通过标志位终止

代码逻辑中增加一个判断，用于控制程序终止。用于代码逻辑是一种循环执行的业务逻辑

代码演示

StopThread 实现 i 自增 j 自增

public class StopThread extends Thread{
    private int i=0,j=0;

    @Override
    public void run() {
        ++i;
        try{
            Thread.sleep(1000L);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        ++j;
    }

    public void print() {
        System.out.println("i=" + i + " j=" + j);
    }
}

线程终止操作

public class Hello {

    public static void main(String[] args) throws InterruptedException{
        StopThread thread = new StopThread();

        thread.start();

        Thread.sleep(100);

        //thread.stop(); 不推荐
        thread.interrupt();

        while (thread.isAlive()) {
            // 确保线程已经终止
            System.out.println(thread.getState().toString());
        } // 输出结果

        thread.print();
        System.out.println(thread.getState().toString());
    }
}

stop 终止输出

TIMED_WAITING
i=1 j=0
TERMINATED

interrupt 终止输出

TIMED_WAITING
RUNNABLE
RUNNABLE
RUNNABLE
RUNNABLE
RUNNABLE
RUNNABLE
RUNNABLE
RUNNABLE
RUNNABLE
RUNNABLE
RUNNABLE
RUNNABLE
RUNNABLE
RUNNABLE
RUNNABLE
RUNNABLE
RUNNABLE
RUNNABLE
RUNNABLE
RUNNABLE
RUNNABLE
i=1 j=1
TERMINATED
java.lang.InterruptedException: sleep interrupted
    at java.lang.Thread.sleep(Native Method)
    at hello.StopThread.run(StopThread.java:10)

通过标志位终止

public class Hello {

    public volatile static boolean flag = true;

    public static void main(String[] args) throws InterruptedException {
        new Thread(() -> {
            try {
                while (flag) { // 判断是否运行
                    System.out.println("运行中");
                    Thread.sleep(1000L);
                }
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }).start();
        // 3秒之后，将状态标志改为False，代表不继续运行
        Thread.sleep(3000L);
        flag = false;
        System.out.println("程序运行结束");
    }
}