MultiThread - Sinh số ngẫu nhiên và hiển thị bình phương số ngẫu nhiên & Synchronized trong Java

#Main.java

/*
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 */
package com.gokisoft.bt1097;

/**
 *
 * @author teacher
 */
public class Main {
    public static void main(String[] args) {
        SharedData sharedData = new SharedData();
        //TONG THOI GIAN XU LY: 20S -> STOP
        
        Thread1 t1 = new Thread1(sharedData);
        Thread2 t2 = new Thread2(sharedData);
        
        t1.start();
        t2.start();
    }
}

#SharedData.java

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package com.gokisoft.bt1097;

/**
 *
 * @author teacher
 */
public class SharedData {
    int rad;
    int timeCounter = 0;

    public SharedData() {
    }

    public int getRad() {
        return rad;
    }

    public void setRad(int rad) {
        this.rad = rad;
    }
    
    public void addTimeMore(int delta) {
        timeCounter += delta;
    }
    
    public boolean isLive() {
        return timeCounter < 20;
    }
}

#Thread1.java

/*
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package com.gokisoft.bt1097;

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

/**
 *
 * @author teacher
 */
public class Thread1 extends Thread{
    SharedData sharedData;

    public Thread1(SharedData sharedData) {
        this.sharedData = sharedData;
    }

    @Override
    public void run() {
        try {
            Thread.sleep(100);
        } catch (InterruptedException ex) {
            Logger.getLogger(Thread1.class.getName()).log(Level.SEVERE, null, ex);
        }
        
        Random random = new Random();
        
        synchronized(sharedData) {
            while (sharedData.isLive()) {
                int rad = random.nextInt(100);
                System.out.println("T1 > " + rad);
                sharedData.setRad(rad);
                
                sharedData.notifyAll();
                try {
                    sharedData.wait();
                } catch (InterruptedException ex) {
                    Logger.getLogger(Thread1.class.getName()).log(Level.SEVERE, null, ex);
                }
                
                try {
                    Thread.sleep(2000);
                } catch (InterruptedException ex) {
                    Logger.getLogger(Thread1.class.getName()).log(Level.SEVERE, null, ex);
                }
                sharedData.addTimeMore(2);
            }
        }
        
        System.out.println("T1 stop");
        synchronized(sharedData) {
            sharedData.notifyAll();
        }
    }
    
}

#Thread2.java

/*
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 * To change this template file, choose Tools | Templates
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package com.gokisoft.bt1097;

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

/**
 *
 * @author teacher
 */
public class Thread2 extends Thread {

    SharedData sharedData;

    public Thread2(SharedData sharedData) {
        this.sharedData = sharedData;
    }

    @Override
    public void run() {
        synchronized (sharedData) {
            while (sharedData.isLive()) {
                sharedData.notifyAll();
                try {
                    sharedData.wait();
                    if(!sharedData.isLive()) break;
                } catch (InterruptedException ex) {
                    Logger.getLogger(Thread2.class.getName()).log(Level.SEVERE, null, ex);
                }

                int rad = sharedData.getRad();
                System.out.println("T2 > " + (rad * rad));
                
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException ex) {
                    Logger.getLogger(Thread1.class.getName()).log(Level.SEVERE, null, ex);
                }
                sharedData.addTimeMore(1);
            }
        }
        
        System.out.println("T2 stop");
        synchronized(sharedData) {
            sharedData.notifyAll();
        }
    }

}