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

#Main.java

/*
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 * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
 */
package com.gokisoft.java2.lesson05.bt1101;

/**
 *
 * @author teacher
 */
public class Main {
    public static void main(String[] args) {
        SharedData sharedData = new SharedData();
        Thread1 t1 = new Thread1(sharedData);
        Thread2 t2 = new Thread2(sharedData);
        
        t1.start();
        t2.start();
    }
}

#SharedData.java

/*
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 */
package com.gokisoft.java2.lesson05.bt1101;

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

    public SharedData() {
    }

    public int getRad() {
        return rad;
    }

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

#Thread1.java

/*
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package com.gokisoft.java2.lesson05.bt1101;

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();
        int rad;

        for (int i = 0; i < 10; i++) {
            synchronized (sharedData) {
                rad = random.nextInt(20);
                System.out.println("T1: " + rad);
                sharedData.setRad(rad);
                
                try {
                    sharedData.notifyAll();
                    sharedData.wait();
                } catch (InterruptedException ex) {
                    Logger.getLogger(Thread1.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        }
        
        synchronized (sharedData) {
            sharedData.notifyAll();
        }
        System.out.println("T1 stop");
    }

}

#Thread2.java

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package com.gokisoft.java2.lesson05.bt1101;

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() {
        for (int i = 0; i < 10; i++) {
            synchronized (sharedData) {
                try {
                    sharedData.notifyAll();
                    sharedData.wait();
                } catch (InterruptedException ex) {
                    Logger.getLogger(Thread1.class.getName()).log(Level.SEVERE, null, ex);
                }
                
                int rad = sharedData.getRad();
                System.out.println("T2: " + (rad * rad));
            }
        }
        
        synchronized (sharedData) {
            sharedData.notifyAll();
        }
        
        System.out.println("T2 stop");
    }

}