线程 - wait & sleep 区别

packagewait_sleep;
/*** Java中的sleep()和wait()的区别*/publicclassTestD {
publicstaticvoidmain(String[] args) {
newThread(newThread1()).start();
try {
Thread.sleep(5000);
        } catch (Exceptione) {
e.printStackTrace();
        }
newThread(newThread2()).start();
    }
privatestaticclassThread1implementsRunnable{
@Overridepublicvoidrun(){
synchronized (TestD.class) {
System.out.println("enter thread1...");
System.out.println("thread1 is waiting...");
try {
//调用wait()方法，线程会放弃对象锁，进入等待此对象的等待锁定池TestD.class.wait();
                } catch (Exceptione) {
e.printStackTrace();
                }
System.out.println("thread1 is going on ....");
System.out.println("thread1 is over!!!");
            }
        }
    }
privatestaticclassThread2implementsRunnable{
@Overridepublicvoidrun(){
synchronized (TestD.class) {
System.out.println("enter thread2....");
System.out.println("thread2 is sleep....");
try {
//在调用sleep()方法的过程中，线程不会释放对象锁。Thread.sleep(5000);
                } catch (Exceptione) {
e.printStackTrace();
                }
System.out.println("thread2 is going on....");
System.out.println("thread2 is over!!!");
//如果我们把代码：TestD.class.notify();给注释掉，即TestD.class调用了wait()方法，但是没有调用notify()//方法，则线程永远处于挂起状态。TestD.class.notify();
            }
        }
    }
}