JAVA中Thread t = new Thread(); //创建另一线程t后该如何定义线程t

可以这样
class MyThread extends Thread{
public void run(){
System.out.println("Mythread 线程");
}
}
MyThread t = new Mythread();
t.start();
或者这样
Thread t = new Thread(new Runnabel(){
public void run(){
System.out.println("Mythread 线程");
}
});
t.start();