Java—传统线程简单使用

java语言创建线程有两种方法：

1.继承thread类，重写父类的run方法，覆盖父类的run方法

//1.new thread的子类
Thread thread = new Thread(){
@Override
public void run() {
// TODO Auto-generated method stub
while(true){
System.out.println(Thread.currentThread().getName());
try {
Thread.sleep(500);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
};
thread.start();

2.实现runnable接口

//2.new Runnable    把runnable对象放入thread中，thread去找runnable的run方法执行，这样更加提现面向对象
Thread thread2 = new Thread(new Runnable(){

@Override
public void run() {
// TODO Auto-generated method stub
while(true){
System.out.println(Thread.currentThread().getName());
try {
Thread.sleep(500);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

}

}){

};
thread2.start();

现在有一个问题，如果我们实现runnable接口再重写父类的run方法，那程序执行runnable的run方法还是执行父类的run方法？

//3.start执行，先找thread的run方法，直接执行thread的run方法。如果不覆盖父类的run方法，就执行runnable的run方法
Thread thread3 = new Thread(new Runnable(){

@Override
public void run() {
// TODO Auto-generated method stub
while(true){
System.out.println("threadrunnable:"+Thread.currentThread().getName());
try {
Thread.sleep(500);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

}

}){
public void run() {
// TODO Auto-generated method stub
while(true){
System.out.println("threadrun:"+Thread.currentThread().getName());
try {
Thread.sleep(500);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

}
};
thread3.start();