class showmaker implements Runnable{
private static int dk=100;
Object obj=new Object();
@Override
public void run() {
while(dk>0){
synchronized (obj){
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println(Thread.currentThread().getName()+":"+dk);
dk--;
}
}
}
}
public class scout {
public static void main(String[] args) {
showmaker s=new showmaker();
Thread t1=new Thread(s);
Thread t2=new Thread(s);
Thread t3=new Thread(s);
t1.setName("窗口1");t2.setName("窗口2");t3.setName("窗口3");
t1.start();
t2.start();
t3.start();
}
}
不是已经给线程加过synchronize的锁了为什么运行的结果还会出现安全问题。