JAVA Basic 강의자료] wait(), notify()의 사용 예제

JAVA Basic 강의자료] wait(), notify()의 사용 예제

 

JAVA Basic 강의자료] wait(), notify()의 사용 예제

 

 

 

 

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wait(), notify()의 사용 예제(1)

 

 

<소스코드>

 

 

import java.util.*;

class SyncStack{
     private Vector buffer = new Vector();
     public synchronized char pop(){
          char c;
          while(buffer.size()==0){
               try{
                     System.out.println("stack대기:");
                     this.wait();
               }catch(Exception e){}
           }
           Character cr = ((Character)buffer.remove(buffer.size()-1));
           c = cr.charValue();
           System.out.println("stack삭제:" + c);
           return c;
     }
     public synchronized void push(char c){
           this.notify();
           Character charObj = new Character(c);
           buffer.addElement(charObj);
           System.out.println("stack삽입:" + c);
     }
} 

 

===============

 

 

class PopRunnable extends Thread{
     public void run(){
           SyncTest.ss.pop();                          
     }
}
class PushRunnable extends Thread{
     private char c;
     public PushRunnable(char c){
            this.c =c ;
     }
     public void run(){
            SyncTest.ss.push(c);
     }
} 

 

 

 

wait(), notify()의 사용 예제(2)

 

 

<소스코드>

 

 

public class SyncTest {
     public static SyncStack ss =new SyncStack();
     public static void main(String[] args){

           //SyncStack에 5데이터삽입
          new PushRunnable('J').start();
          new PushRunnable('A').start();
          new PushRunnable(‘V').start();
          new PushRunnable(‘A').start();
          new PushRunnable('O').start();
         
          new PopRunnable().start();//O
          new PopRunnable().start();//A
          new PopRunnable().start();//V
          new PopRunnable().start();//A
          new PopRunnable().start();//J
          new PopRunnable().start();//대기상태
          try{
                Thread.sleep(5000);
          }catch(Exception e){}
          System.out.println("===== passed 5 seconds======");
          new PushRunnable('K').start();
     }
}