package mmscenter;import java.util.*;/** * <p>Title: </p> * <p>Description: </p> * <p>Copyright: Copyright (c) 2002</p> * <p>Company: </p> * @author rjz * @version 1.0 */public class DataPool {        private Vector pipe;        private int capacity;        private int size;        public boolean has_elements=false;        public DataPool() {                pipe=new Vector();                this.size=0;                this.capacity=100;        }        public DataPool(int capacity){                pipe=new Vector();                this.capacity=capacity;                this.size=0;        }        public int getSize(){                return this.size;        }        public boolean isFull(){                if (this.capacity>this.size)                        return false;                else                        return true;        }        public boolean isEmpty(){                if (this.size==0)                        return true;                else                        return false;        }        public synchronized boolean push(Object o){/*               while(this.size==this.capacity){                        try{                                wait();                        }catch(Exception e){                                e.printStackTrace();                        }                }                this.pipe.addElement(o);                this.size++;                try{                        notifyAll();                }catch(Exception e){                        e.printStackTrace();                }                //this.has_elements=true;                return true;*/                if (this.size<this.capacity){                        this.pipe.addElement(o);                        this.size++;                        return true;                }else{                        return false;                }        }        public synchronized Object pop(){               //System.out.println("===========pop==========");                //if (this.has_elements){/*                        while(this.size<=0){                                try{                                        //if(this.has_elements){                                                //System.out.println("wait");                                                wait();                                                //System.out.println("wake");                                        //}                                }catch(Exception e){                                        e.printStackTrace();                                }                        }                //}                Object result=null;                if (this.size>0){                        result=this.pipe.remove(0);                        this.size--;                }                try{                        notifyAll();                }catch(Exception e){                        e.printStackTrace();                }                return result;*/                Object result=null;                if (this.size>0){                        result=this.pipe.get(0);                        this.pipe.remove(0);                        this.size--;                }                return result;        }        public void release(){                this.pipe.removeAllElements();                this.pipe=null;        }        public static void main(String[] args) {               // DataPool dataPool1 = new DataPool();        }}