java 同步块疑惑

自己在学习多线程，synchronized关键字能获取对象的锁，但我测试结果让我还疑惑，同时有2个thread都能进入同步块中，但如果不使用wait、notify，就只能就一个thread进入同步块，请熟悉多线程的牛人帮忙解答下。

public class test {
public static void main(String[] args) {
Object lockObject = new Object();
ThreadT threadT = new ThreadT("thread test1",lockObject);
ThreadT threadW = new ThreadT("thread test2",lockObject);
Thread thread1 = new Thread(threadT);
Thread thread2 = new Thread(threadW);
thread1.start();
thread2.start();
}


}

class ThreadT implements Runnable{
private String name = "";
private Object objectlock = null;
public ThreadT(String name,Object objectlock){
this.name = name;
this.objectlock = objectlock;
}
@Override
public void run() {
synchronized(objectlock){
// TODO Auto-generated method stub
try {
System.out.println(name+" get the lock");
objectlock.wait(1000);
System.out.println(name+" running.......");
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
finally{
objectlock.notify();
}
}
}
}

输出结果：
thread test1 get the lock
thread test2 get the lock
等待1秒后输出
thread test1 running.......
thread test2 running.......

如果把run方法修改为，

public void run() {
synchronized(objectlock){
// TODO Auto-generated method stub
//try {
System.out.println(name+" get the lock");
// objectlock.wait(3000);
System.out.println(name+" running.......");
//} catch (InterruptedException e) {
// TODO Auto-generated catch block
// e.printStackTrace();
//}
//finally{
// objectlock.notify();
//}
}
}
执行结果为：
thread test1 get the lock
thread test1 running.......
thread test2 get the lock
thread test2 running.......