Synchronization Demo

Author: CMPundhir

SynchronisationDemo.java

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+class Table{
+	public synchronized void printTable(int n){
+		for(int i=1;i<11;i++){
+			System.out.println(n*i);
+			try{Thread.sleep(200);}catch(Exception e){}
+		}
+	}
+}
+class MyThread extends Thread{
+	Table t;
+	int n;
+	MyThread(Table t,int n){
+		this.t = t;
+		this.n = n;
+	}
+	public void run(){
+		t.printTable(n);
+	}
+}
+class SynchronisationDemo{
+	public static void main(String[] args){
+		Table tb = new Table();
+		MyThread t = new MyThread(tb,5);
+		t.start();
+		MyThread t2 = new MyThread(tb,50);
+		t2.start();
+	}
+}

SynchronizationDemo2.java

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+class Table{
+	public static synchronized void printTable(int n){
+		for(int i=1;i<11;i++){
+			System.out.println(n*i);
+			try{Thread.sleep(200);}catch(Exception e){}
+		}
+	}
+}
+class MyThread extends Thread{
+	Table t;
+	int n;
+	MyThread(Table t,int n){
+		this.t = t;
+		this.n = n;
+	}
+	public void run(){
+		t.printTable(n);
+	}
+}
+class SynchronizationDemo2{
+	public static void main(String[] args){
+		Table tb = new Table();
+		MyThread t = new MyThread(tb,5);
+		t.start();
+		//created another table object so now both thread have different resources so we
+		//need static synchronization 
+		Table tb2 = new Table();
+		MyThread t2 = new MyThread(tb2,50);
+		t2.start();
+	}
+}

SynchronizationDemo3.java

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+class Table{
+	public void printTable(int n){
+		synchronized(this){
+			for(int i=1;i<11;i++){
+				System.out.println(n*i);
+				try{Thread.sleep(200);}catch(Exception e){}
+			}
+		}
+	}
+}
+class MyThread extends Thread{
+	Table t;
+	int n;
+	MyThread(Table t,int n){
+		this.t = t;
+		this.n = n;
+	}
+	public void run(){
+		t.printTable(n);
+	}
+}
+class SynchronizationDemo3{
+	public static void main(String[] args){
+		Table tb = new Table();
+		MyThread t = new MyThread(tb,5);
+		t.start();
+	
+		MyThread t2 = new MyThread(tb,50);
+		t2.start();
+	}
+}

SynchronizationDemo4DeadLock.java

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+class SynchronizationDemo4DeadLock{
+	
+	public static void main(String[] args){
+		final String res1 = "Icecream";
+		final String res2 = "Chocolate";
+		Thread t1 = new Thread(){
+			public void run(){
+				synchronized(res1){
+					System.out.println(res1+" is locked by "+getName());
+					try{Thread.sleep(200);}catch(Exception e){}
+					synchronized(res2){
+						System.out.println(res2+" is locked by "+getName());
+						try{Thread.sleep(200);}catch(Exception e){}
+						System.out.println(res2+" is released by "+getName());
+					}
+					System.out.println(res1+" is released by "+getName());
+				}
+			}
+		};
+		t1.start();
+		Thread t2 = new Thread(){
+			public void run(){
+				synchronized(res2){
+					System.out.println(res2+" is locked by "+getName());
+					try{Thread.sleep(200);}catch(Exception e){}
+					synchronized(res1){
+						System.out.println(res1+" is locked by "+getName());
+						try{Thread.sleep(200);}catch(Exception e){}
+						System.out.println(res1+" is released by "+getName());
+					}
+					System.out.println(res2+" is released by "+getName());
+				}
+			}
+		};
+		t2.start();
+	}
+}