方式一：通過構造方法設置線程名稱。

class SetName1 extends Thread{
  public SetName1(String name){
    super(name);
   }
  @Override
  public void run() {
    System.out.println(this.getName());
   }
}
public class SetNameThread {
  public static void main(String[] args) {
    SetName1 setName1 = new SetName1("SetName1");
    setName1.start();
   }
}

方式二：通過setName()方法設置線程名稱。

class SetName2 implements Runnable{
  @Override
  public void run() {
    System.out.println(Thread.currentThread().getName());
   }
}
public class SetNameThread {
  public static void main(String[] args) {
    Thread thread = new Thread(new SetName2());
    thread.setName("SetName2");
    thread.start();
   }
}