Java 学习————多线程同步

public class Tongywo {public static void main(String[] args) {// TODO Auto-generated method stubShangdian0 sd=new Shangdian0(100);Goumai0 no1=new Goumai0(70, sd, "No.1");Goumai0 no2=new Goumai0(80, sd, "No.2");no1.start();no2.start();}}class Shangdian0{int kucun=0;public Shangdian0(int kucun){this.kucun=kucun;}public synchronized void goumai(int i){if(i<kucun){kucun-=i;System.out.println(Thread.currentThread().getName()+"购买"+i+"本");System.out.println("商店剩余"+kucun+"本");}else{System.out.println("库存量不够");}}}class Goumai0 extends Thread{int i;Shangdian0 sd;public Goumai0(int i, Shangdian0 sd, String name){this.i=i;this.sd=sd;this.setName(name);}public void run(){sd.goumai(i);}}