1.继承Thread类,重写run()方法
2.实现Runnable接口,实现run()方法
继承Thread类
package thread;
public class Demo1_Thread {
public static void main(String[] args) {
//创建Thread的子类对象
Thread t1 = new MyThread();
Thread t2 = new MyThread();
//开启线程
t1.start();
t2.start();
}
}
//1.继承Thread
class MyThread extends Thread{
@Override //2.重写run()方法
public void run() { //3.将要执行的代码,写在run()方法里面
while(true) {
System.out.println(getId()+"..."+getName());
}
}
}
运行结果如下
10...Thread-0
11...Thread-1
11...Thread-1
10...Thread-0
10...Thread-0
11...Thread-1
11...Thread-1
10...Thread-0
10...Thread-0
实现Runnable接口
package thread;
public class Demo2_Thread {
public static void main(String[] args) {
//创建Runable子类对象
Runnable r = new MyRunable();
//将子类对象传入Thread类的构造方法中
Thread t1 = new Thread(r);
Thread t2 = new Thread(r);
//开启线程
t1.start();
t2.start();
}
}
//1.实现Runable接口
class MyRunable implements Runnable{
@Override //2.实现run()方法
public void run() { //3.将要执行的代码,写在run()方法里面
while(true) {
System.out.println(Thread.currentThread().getName()+" start...");
}
}
}
运行结果如下
Thread-1 start...
Thread-1 start...
Thread-0 start...
Thread-0 start...
Thread-0 start...
Thread-0 start...
Thread-1 start...
Thread-1 start...
Thread-1 start...
两种方式对比:由于java是单继承多实现,所以继承Thread要确保该类没有父类,而实现Runnble接口的子类无法直接使用Thread类的方法和属性,需要通过Thread类.currentThread()方式获得正在运行线程的引用。