主方法
public class main {
public static void main(String[] args) throws InterruptedException {
long time = System.currentTimeMillis();
MyThread[] mts = new MyThread[10];
for (int i = 0; i < 10; i++) {
mts[i] = new MyThread();
}
for (int i = 0; i < 10; i++) {
mts[i].start();
mts[i].join();
}
System.out.println("耗时：" + (System.currentTimeMillis() - time));
}
}
单例模式实现类
public class Singleton {
private static Singleton instance;
private Singleton() {}
public static Singleton getInstance() {
if (instance == null) {
synchronized (Singleton.class) {
if (instance == null) {
instance = new Singleton();
}
}
}
return instance;
}
}
线程类
public class MyThread extends Thread {
@Override
public void run() {
System.out.println(Singleton.getInstance().hashCode());
}
}
