多线程基础篇(一)

线程之间方法区和堆内存共享,栈内存不共享;哪个线程调用sleep()方法,哪个线程就进入睡眠状态,与哪个对象调用该方法无关.start()方法的作用是创建一个线程的栈内存,该方法与普通方法相同,执行完立刻销毁.

package test1;

public class RacerRunnable implements Runnable{
/**
* 龟兔赛跑多线程
*/
public String winner;
public void run() {
for(int step = 1; step <= 100; step++) {
if(Thread.currentThread().getName().equals("rabbit") && step % 10 == 0)
try {
Thread.sleep(1);
} catch (InterruptedException e) {
e.printStackTrace();
}
if(gameOver(step)==true) {
break;
}
System.out.println(Thread.currentThread().getName()+"-->"+step );
}
}
public boolean gameOver(int step) {
if(winner != null) {
return true;
}else if(step == 100) {
winner = Thread.currentThread().getName();
System.out.println("winner-->"+Thread.currentThread().getName());
return true;
}else {
return false;
}
}
public static void main(String[] args) {
RacerRunnable racer = new RacerRunnable();
new Thread(racer, "tortoise").start();
new Thread(racer, "rabbit").start();
try {
Thread.sleep(2000);   //主线程调用sleep()方法,主线程进入睡眠状态.
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println("主线程进入休眠状态！");
}
}