Java Implementation blocking queue

package multithreading concurrency; import java.util.stack;/** * Created by z84102272 on 2018/7/17.  */public class Blockqueueimpl {private final static Object Pushlock = new Object ();  Push lock private Final static Object Poplock = new Object ();    The lock of the pop private stack<object> Stack;    Store data public Blockqueueimpl () {stack = new stack<> (); }/** * Push lock */private void Pushlock () {synchronized (pushlock) {try{pus            Hlock.wait ();            }catch (Exception e) {e.printstacktrace ();    }}}/** * Release push lock */private void Pushunlock () {pushlock.notify ();        } private void Poplock () {try {poplock.wait ();        }catch (Exception e) {e.printstacktrace ();    }} private void Popunlock () {poplock.notify ();        Public synchronized void push (Object o) {int max_size = 3; if (Stack.size () >= max_size) {PUShlock ();        } stack.push (o);    Popunlock ();        Public Object Pop () {if (Stack.size () ==0) {poplock ();        } Object o = Stack.pop ();        Pushunlock ();    return o; }    }

　　

Java Implementation blocking queue