public class MyThread extends Thread {
 public void run(){
  System.out.println("MyThread running");
 }
}

MyThread myThread = new MyThread();
myTread.start();

Thread thread = new Thread(){
 public void run(){
  System.out.println("Thread Running");
 }
};
thread.start();

public class MyThread implements Runnable {
@override
public void run() {
 System.out.println("MyThread is running");
}
}

Thread thread = new Thread(new MyRunnable());
thread.start();

new Thread(new Runnable(){
 @override
 public void run() {
  System.out.println("Thread is running");
 }
}).start();

Thread thread = new Thread(new MyRunnable(),"name");?获得名字
Thread thread = new Thread(new MyRunnable(),"name");
System.out.println(thraed.getName());?获取运行当期代码线程的名字
Thread.currentThread().getName();

public class Count {
 private long count = 0;
 
 public long getCount() {
  return count;
 }
 
 public void service() {
  count++;
 }
}

final Count count = new Count();
for (int i = 0; i < 20000; i++) {
 Thread thread3 = new Thread(){
  @Override
  public void run() {
   count.service();
   if (count.getCount() == 20000) {
    System.out.println("ahha");
   }
  }
 };
 thread3.start();
}