java多线程（三）_多线程练习以及线程运行状态简图

练习题1

/*
练习：
创建两个线程，和主线程交替运行。

原来线程都有自己默认的名称。
Thread-编号 该编号从0开始。

static Thread currentThread():获取当前线程对象。
getName(): 获取线程名称。

设置线程名称：setName或者构造函数。

*/

public class ThreadDemo  extends Thread{

ThreadDemo(String name){
super(name);
}
@Override
public void run() {
for (int i = 0; i < 3; i++) {
System.out.println(Thread.currentThread().getName()+" run..."+i);
}
}

public static void main(String[] args) {
ThreadDemo t1 = new ThreadDemo("one");
ThreadDemo t2 = new ThreadDemo("two");
t1.start();
t2.start();
for (int i = 0; i < 3; i++) {
System.out.println(Thread.currentThread().getName()+" run..."+i);
}

}

}

main run...0
one run...0
two run...0
two run...1
two run...2
one run...1
one run...2
main run...1
main run...2

线程状态

参考