//代碼
class ThreadSelllandRefund implements Runnable{
private int tickets=0;
@Override
public void run() {
// TODO Auto-generated method stub
String name=Thread.currentThread().getName();
if(name.equals("退票視窗")) {
for(int i=0;i<3;i++) {
try {
Thread.sleep(10);
}
catch(InterruptedException e) {
e.printStackTrace();
}
refund();
}
}
if(name.contains("售票視窗")) {
for(int i=0;i<1;i++) {
sell();
}
}
}
private synchronized void sell() {
if(tickets>0) {
System.out.println(Thread.currentThread().getName()+"售出一張車票，車票余量為"+(--tickets)+"張");
}else {
System.out.println(Thread.currentThread().getName()+"說：車票已經售完，請等待退票！");
try {
wait();
}
catch(InterruptedException e) {
e.printStackTrace();
}
}
}
private synchronized void refund() {
tickets++;
System.out.println(Thread.currentThread().getName()+"退回一張車票，車票余量為"+(tickets)+"張");
notify();
}
}
public class ticketsnotify_demo extends Thread{
public static void main(String[] args) {
ThreadSelllandRefund t=new ThreadSelllandRefund();
Thread thread3=new Thread(t,"退票視窗");
Thread thread1=new Thread(t,"售票視窗A");
Thread thread2=new Thread(t,"售票視窗B");
thread1.setPriority(Thread.MIN_PRIORITY);
thread2.setPriority(Thread.MIN_PRIORITY);
thread3.setPriority(Thread.MAX_PRIORITY);
thread3.start();
thread1.start();
thread2.start();
}
}
//問題：為什么我設定退票的優先級最高，可以程式都是先執行售票呢？如下圖
按理說，先退票的話，就只剩一張票了吧，可是結果卻有3張票，代碼附上
轉載請註明出處，本文鏈接：https://www.uj5u.com/houduan/228159.html
標籤：Java相關
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