带你聊聊 Java 并发编程之线程基础(3)

线程运行状态时 Thread.isInterrupted() 返回的线程状态是 false，然后调用 thread.interrupt() 中断线程 Thread.isInterrupted() 返回的线程状态是 true，最后调用 Thread.interrupted() 复位线程Thread.isInterrupted() 返回的线程状态是 false 或者抛出 InterruptedException 异常之前，线程会将状态设为 false。

下面来看下两种方式复位线程的代码，首先是 Thread.interrupted() 的方式复位代码：

public class InterruptDemo { 
 
    public static void main(String[] args) throws InterruptedException { 
        Thread thread = new Thread(() -> { 
            while (true) { 
                //Thread.currentThread().isInterrupted()默认是false,当main方式执行thread.interrupt()时,状态改为true 
                if (Thread.currentThread().isInterrupted()) { 
                    System.out.println("before:" + Thread.currentThread().isInterrupted());//before:true 
                    Thread.interrupted(); // 对线程进行复位，由 true 变成 false 
                    System.out.println("after:" + Thread.currentThread().isInterrupted());//after:false 
                } 
            } 
        }, "interruptDemo"); 
        thread.start(); 
        TimeUnit.SECONDS.sleep(1); 
        thread.interrupt(); 
    } 
} 

抛出 InterruptedException 复位线程代码：

public class InterruptedExceptionDemo { 
 
    public static void main(String[] args) throws InterruptedException { 
        Thread thread = new Thread(() -> { 
            while (!Thread.currentThread().isInterrupted()) { 
                try { 
                    TimeUnit.SECONDS.sleep(1); 
                } catch (InterruptedException e) { 
                    e.printStackTrace(); 
                    // break; 
                } 
            } 
        }, "interruptDemo"); 
        thread.start(); 
        TimeUnit.SECONDS.sleep(1); 
        thread.interrupt(); 
        System.out.println(thread.isInterrupted()); 
    } 
} 

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