JAVA实现多线程的两种方法

class ThreadText extends Thread {
public void run() {
for (int a=0; a<10; a++) {
System.out.println(currentThread().getName() + ":-1:" + a);
}
}
}

class RunnableText implements Runnable {
public void run() {
for (int a=0; a<10; a++) {
System.out.println(Thread.currentThread().getName() + ":-2:" + a);
}
}
}

public class StartThread {
public static void main(String[] args) {
ThreadText tt1 = new ThreadText();
tt1.start();
tt1.run();

RunnableText tt2 = new RunnableText();
Thread thread = new Thread(tt2);
Thread thread1 = new Thread(tt2);
thread.start();
try {
thread.join() ;
} catch (InterruptedException ex) {
throw new RuntimeException(ex);
}

System.out.println("thread1 will be start!");
thread1.start();
}
}