volatile
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线程间通信，使得被volatile修饰的变量具有可见性
- 一个线程对变量的写一定对之后对这个变量的读的线程可见
public class Volatile_test { public static void main(String[] args) throws InterruptedException { T t = new T(); Thread t1 = new Thread(t); t1.start(); Thread.sleep(3000); t.setIsrunning(false); System.out.println("finish"); } } class T implements Runnable { private volatile boolean isrunning = true; public boolean isIsrunning() { return isrunning; } public void setIsrunning(boolean isrunning) { this.isrunning = isrunning; } @Override public void run() { while (isIsrunning()==true){ System.out.println("is running"); try { Thread.sleep(1000); } catch (InterruptedException e) { e.printStackTrace(); } } } }
