Notify, NotifyAll, Wait -> Sync

Bài toán:
T1 -> Sinh ngẫu nhiên các số tự nhiên rad: 0 -> 100
T2 -> Hiển thị BT số rad được sinh từ T1
Yêu cầu sau:
T1...(rad)...               ...(rad)...               ......
T2.          ...(rad*rad)...           ...(rad*rad)...

==============================================================
T1(sync)               ..(rad)..set..display..notifyAll..wait                     flag=true      ..(rad)..set..display..
T2..(notifyAll)..(wait)                       flag=true      ..get..bt..continue..notifyAll..wait

T1..(rad)..set..display..notifyAll..wait  flag=true      ..(rad)..set..display..notifyAll..wait
T2                                      ..notifyAll..wait                       flag=true      ..get..bt....

==============================================================
Bài toán:
T1 -> Sinh ngẫu nhiên các số tự nhiên rad: 0 -> 100
T2 -> rad:chan -> hien thị bt
T3 -> rad:lẻ -> hiển thị lập phường

T1...(rad)...               ...(rad)...                   ...(rad)...                    ...(rad)...
T2.          ...(rad*rad)...                                                                        ...(rad*rad)...
T3.                                    ...(rad*rad*rad)...            ...(rad*rad*rad)...

#ThreadTwo.java

/*
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 */
package java2.lesson06;

import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author Diep.Tran
 */
public class ThreadTwo extends Thread {

    ShareData shareData;

    public ThreadTwo(ShareData shareData) {
        this.shareData = shareData;
    }

    @Override
    public void run() {
        for (int i = 0; i < 10; i++) {
            synchronized (shareData) {
                try {
                    shareData.notifyAll();
                    shareData.wait();
                } catch (InterruptedException ex) {
                    Logger.getLogger(ThreadTwo.class.getName()).log(Level.SEVERE, null, ex);
                }

                int rad = shareData.getRad();
                System.out.println("BT: " + (rad * rad));
            }
        }
        System.out.println("T2 stop");
        synchronized(shareData) {
            shareData.notifyAll();
        }
    }
}

#ThreadOne.java

/*
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 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package java2.lesson06;

import java.util.Random;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author Diep.Tran
 */
public class ThreadOne extends Thread {

    ShareData shareData;

    public ThreadOne(ShareData shareData) {
        this.shareData = shareData;
    }

    @Override
    public void run() {
        Random random = new Random();

        for (int i = 0; i < 10; i++) {
            synchronized (shareData) {
                int rad = random.nextInt(100);
                shareData.setRad(rad);

                System.out.println(rad);

                try {
                    shareData.notifyAll();
                    shareData.wait();//Thread se tam thoi ko chay -> tiep tuc chay -> notify (notifyAll) -> danh thuc Thread -> Tiep tuc chay
                } catch (InterruptedException ex) {
                    Logger.getLogger(ThreadOne.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        }
        System.out.println("T1 stop");
        synchronized(shareData) {
            shareData.notifyAll();
        }
    }
}

#ShareData.java

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package java2.lesson06;

/**
 *
 * @author Diep.Tran
 */
public class ShareData {
    int rad;

    public int getRad() {
        return rad;
    }

    public void setRad(int rad) {
        this.rad = rad;
    }
}

#Main.java

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package java2.lesson06;

/**
 *
 * @author Diep.Tran
 */
public class Main {
    public static void main(String[] args) {
        ShareData shareData = new ShareData();
        
        ThreadOne t1 = new ThreadOne(shareData);
        ThreadTwo t2 = new ThreadTwo(shareData);
        
        t2.start();
        t1.start();
    }
}