Thread.currentThread()与this的区别：
1.Thread.currentThread()方法返回的是对当前正在执行的线程对象的引用，this代表的是当前调用它所在函数所属的对象的引用。
2.使用范围：
Thread.currentThread()在两种实现线程的方式中都可以用。 this只能在继承方式中使用。因为在Thread子类中用this，this代表的是线程对象。 如果你在Runnable实现类中用this.getName()，那么编译错误，因为在Runnable中，不存在getName方法。
demo1：
public class MyThread extends Thread{ @Override public void run(){ System.out.println("run currentThread.isAlive()=" + Thread.currentThread().isAlive()); System.out.println("run this.isAlive()=" + this.isAlive()); System.out.println("run currentThread.getName()=" + Thread.currentThread().getName()); System.out.println("run this.getName()=" + this.getName()); } } 运行Run.java如下: public class Run { public static void main(String[] args) { MyThread mythread = new MyThread(); mythread.setName("A"); System.out.println("begin main==" + Thread.currentThread().isAlive()); System.out.println("begin==" + mythread.isAlive()); mythread.start(); System.out.println("end==" + mythread.isAlive()); } } 运行结果： begin main==true begin==false end==true run currentThread.isAlive()=true run this.isAlive()=true run currentThread.getName()=A run this.getName()=A
demo2：
public class MyThread extends Thread{ @Override public void run(){ System.out.println("run currentThread.isAlive()=" + Thread.currentThread().isAlive()); System.out.println("run this.isAlive()=" + this.isAlive()); System.out.println("run currentThread.getName()=" + Thread.currentThread().getName()); System.out.println("run this.getName()=" + this.getName()); } } 运行Run.java如下: public class Run { public static void main(String[] args) { MyThread mythread = new MyThread(); Thread t1 = new Thread(mythread); t1.setName("A"); System.out.println("begin main==" + Thread.currentThread().isAlive()); System.out.println("begin==" + mythread.isAlive()); t1.start(); System.out.println("end==" + mythread.isAlive()); } } 运行结果： begin main==true begin==false end==false run currentThread.isAlive()=true run this.isAlive()=false run currentThread.getName()=A run this.getName()=Thread-0
转载于:https://www.cnblogs.com/meizizhoushan/p/7282551.html
