public class Program { public static Tuser user = new Tuser(); public static void main(String[] args) throws InterruptedException { new Thread( new Runnable(){ public void run(){ while(true){ String s = get(); if (user.getUsername().equals("hehe")) { System.out.println("成功"); //break; } } } } ).start(); Thread.sleep(1000); new Thread(new Runnable(){ @Override public void run(){ user.setUsername("hehe"); user=null; } }).start(); } public static synchronized String get(){ return user.getUsername(); }}三个渐进式问题： 1.执行后什么结果 2 为什么 3 去掉get方法的synchronized会怎么样？
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