【Java基礎】多線程中同步的兩種解決方案

一、同步代碼

import java.util.logging.Level;
import java.util.logging.Logger;
public class MyThread implements Runnable {//實現Ruannable藉口

    private int tickets = 10;      //一共10張票
    @Override
    public void run() {     //實現run()方法
        for (int i = 0; i < 50; i++) {
            synchronized (this) {
                if (tickets > 0) {
                    try {
                        Thread.sleep(200);
                    } catch (InterruptedException ex) {
                        Logger.getLogger(MyThread.class.getName()).log(Level.SEVERE, null, ex);
                    }
                    System.out.println(Thread.currentThread().getName() + ":ticket" + tickets--);
                }
            }
        }
    }
}

2同步方法

import java.util.logging.Level;
import java.util.logging.Logger;
public class TicketThread extends Thread {
    private int tickets = 10;      //一共10張票
    @Override
    public void run() {     //實現run()方法
        for (int i = 0; i < 50; i++) {
            this.sale();
        }
    }
    public synchronized void sale() {
        if (tickets > 0) {
            try {
                Thread.sleep(200);
            } catch (InterruptedException ex) {
                Logger.getLogger(MyThread.class.getName()).log(Level.SEVERE, null, ex);
            }
            System.out.println(Thread.currentThread().getName() + ":ticket" + tickets--);
        }
    }
}