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java多线程

package com.qqyumidi;public class ThreadTest {    /**     * @param args     */    public static void main(String[] args) {        // TODO Auto-generated method stub        MyRunnable r = new MyRunnable();        Thread t = new Thread(r);        t.start();        synchronized (r) {            try {                System.out.println("main thread 等待t线程执行完");                r.wait();                System.out.println("被notity唤醒，得以继续执行");            } catch (InterruptedException e) {                // TODO Auto-generated catch block                e.printStackTrace();                System.out.println("main thread 本想等待，但被意外打断了");            }            System.out.println("线程t执行相加结果" + r.getTotal());        }    }}class MyRunnable implements Runnable {    private int total;    @Override    public void run() {        // TODO Auto-generated method stub        synchronized (this) {            System.out.println("Thread name is:" + Thread.currentThread().getName());            for (int i = 0; i < 10; i++) {                total += i;            }            notify();            System.out.println("执行notif后同步代码块中依然可以继续执行直至完毕");        }        System.out.println("执行notif后且同步代码块外的代码执行时机取决于线程调度");    }    public int getTotal() {        return total;    }}