线程上同步的不同输出

Question

while while（true）然后同步（object）在while循环中有什么区别...而另一种方式是同步（object）和while（true）whithin？它在逻辑上有什么不同？我发现输出没有区别。

public class H extends Thread   {
    String info = "";
    public H (String info) {
        this.info    = info;
    }
    public synchronized void run () {
       try {

        while ( true )  {
            System.out.println(info);
            this.notify();
            this.wait();
        }
       } catch ( Exception e )  {}
    }
    public static void main (String args []) {
        new H("0").start();
        new H("1").start();
    }
}


public class X extends Thread   {
    private String info;
    static Object o = new Object();
    public X (String info) {
        this.info    = info;
    }
    public void run () {
        while ( true )  {
            synchronized ( o ) {
                System.out.println(info);
                try {
                    o.notify();
                    sleep(100);
                    o.wait(1);
                } catch ( Exception e ) { }
            }
        }
    }
    public static void main (String args []) {
        ( new X("0") ).start();
        ( new X("1") ).start();
    }
}