public class TestSync implements Runnable {
Timer timer = new Timer();
public static void main(String[] args) {
TestSync test = new TestSync();
Thread t1 = new Thread(test);
Thread t2 = new Thread(test);
t1.setName("t1");
t2.setName("t2");
t1.start();
t2.start();
}
public void run(){
timer.add(Thread.currentThread().getName());
}
}
class Timer{
private static int num = 0;
public synchronized void add(String name){
//synchronized (this) {
num ++;
try {Thread.sleep(1);}
catch (InterruptedException e) {}
System.out.println(name+", 你是第"+num+"个使用timer的线程");
//}
}
}
Timer timer = new Timer();
public static void main(String[] args) {
TestSync test = new TestSync();
Thread t1 = new Thread(test);
Thread t2 = new Thread(test);
t1.setName("t1");
t2.setName("t2");
t1.start();
t2.start();
}
public void run(){
timer.add(Thread.currentThread().getName());
}
}
class Timer{
private static int num = 0;
public synchronized void add(String name){
//synchronized (this) {
num ++;
try {Thread.sleep(1);}
catch (InterruptedException e) {}
System.out.println(name+", 你是第"+num+"个使用timer的线程");
//}
}
}
本文提供了一个Java多线程环境下的具体示例,通过一个名为TestSync的类实现。该类实现了Runnable接口,并在run方法中利用了synchronized关键字来确保线程安全地更新静态变量num。此外,还创建了一个Timer类,用来模拟多个线程共享资源的情景。通过这个例子,可以更好地理解Java中的线程同步机制。
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