java创建多线程

package javai;

public class NewThread implements Runnable {

    Thread t;

    public NewThread() {
        t = new Thread(this, "I create a new thread.");
        System.out.println("Child thread:  " + t);
        t.start();
    }

    @Override
    public void run() {

        try {
            for (int i = 0; i < 5; i++) {
                System.out.println("Chinld thead:  " + i);
                Thread.sleep(500);
            }
        } catch (Exception e) {
            System.out.println("Child thead sinterrupted ");
        }
        finally {
            System.out.println("Child thead exiting ");
        }
    }

}

package javai;

public class ThreadTest {

    public static void main(String[] args) {
        new NewThread();

        try {
            for (int i = 0; i < 5; i++) {
                System.out.println("Main thead:  " + i);
                Thread.sleep(500);
            }
        } catch (Exception e) {
            System.out.println("Main thead sinterrupted ");
        } finally {
            System.out.println("Main thead exiting ");
        }
    }
}