package p1; public class Derivation extends Protection { public Derivation() { System.out.println("Derived class constructor");

Size: px

Start display at page:

Download "package p1; public class Derivation extends Protection { public Derivation() { System.out.println("Derived class constructor");"

Gervase Wilkerson
6 years ago
Views:

1 PROGRAM:1 WAP to implement the packages //package 1: package p1; public class Protection int n=1; public int n_pub=2; private int n_pri=3; protected int n_pro=4; public Protection () System.out.println("Base class constructor"); System.out.println("The value of n is: "+n); System.out.println("The value of n_pub is: "+n_pub); System.out.println("The value of n_pri is: "+n_pri); System.out.println("The value of n_pro is: "+n_pro); package p1; public class Derivation extends Protection public Derivation() System.out.println("Derived class constructor"); System.out.println("The value of n is: "+n); System.out.println("The value of n_pub is: "+n_pub); System.out.println("The value of n_pri is private and so not available to outside class"); System.out.println("The value of n_pro is: "+n_pro); package p1; public class SamePackage public SamePackage() Protection p = new Protection();

2 System.out.println("Same package class constructor"); System.out.println("The value of n is: "+p.n); System.out.println("The value of n_pub is: "+p.n_pub); System.out.println("The value of n_pri is private so not available to outside class"); System.out.println("The value of n_pro is: "+p.n_pro); package p1; public class Demo public static void main(string s[]) Protection ob1= new Protection(); Derivation ob2= new Derivation(); SamePackage ob3= new SamePackage(); OUTPUT: Base class constructor The value of n_pri is: 3 Derived class constructor The value of n_pri is private and so not available to outside class Base class constructor The value of n_pri is: 3 Same package class constructor The value of n_pri is private and so not available to outside class The value of n_pro is:

3 //Package 2: package p2; class Protection1 extends p1.protection public Protection1() System.out.println("other Package derived class"); System.out.println("The value of n_pub is: "+n_pub); System.out.println("The value of n_pri is private "); System.out.println("The value of n is not visible "); System.out.println("The value of n_pro is: "+n_pro); package p2; import p1.*; public class OtherPackage public OtherPackage() Protection p=new Protection(); System.out.println("The value of n_pub is: "+p.n_pub); System.out.println("The value of n_pri is private,p.n_pri"); System.out.println("The value of n is not visible "); System.out.println("The value of n_pro is: protected,p.n_pro"); package p2; public class Demo1 public static void main(string args[]) Protection1 obj= new Protection1(); OtherPackage obj1= new OtherPackage();

4 OUTPUT: C:\Documents and Settings\User\Desktop\javapgms>java p2.demo1 Base class constructor The value of n_pri is: 3 other Package derived class The value of n_pri is private The value of n is not visible Base class constructor The value of n_pri is: 3 The value of n_pri is private,p.n_pri The value of n is not visible The value of n_pro is: protected,p.n_pro

5 PROGRAM:2(a) WAP to implement Multithreading using Runnable Interface class NewThread implements Runnable Thread t; NewThread() t= new Thread(this,"Demo Thread"); System.out.println("Child Thread:"+t); t.start(); public void run() try for(int i=5;i>0;i--) System.out.println("Child Thread:"+i); Thread.sleep(500); catch(interruptedexception ie) System.out.println("Child Interrupted"); System.out.println("Child Exited"); class ThreadDemo public static void main(string args[]) new NewThread(); try for(int i=5;i>0;i--) System.out.println("Main Thread"+i); Thread.sleep(1000); catch(interruptedexception ie) System.out.println("Main Interrupted"); System.out.println("Main Exiting");

6 OUTPUT: C:\Documents and Settings\User\Desktop\javapgms>java ThreadDemo Child Thread:Thread[Demo Thread,5,main] Main Thread5 Child Thread:5 Child Thread:4 Main Thread4 Child Thread:3 Child Thread:2 Main Thread3 Child Thread:1 Child Exited Main Thread2 Main Thread1 Main Exiting

7 PROGRAM:2(b) WAP to implement Multithreading by extending the Thread class class NewThread implements Runnable Thread t; NewThread() t= new Thread(this,"Demo Thread"); System.out.println("Child Thread:"+t); t.start(); public void run() try for(int i=5;i>0;i--) System.out.println("Child Thread:"+i); Thread.sleep(500); catch(interruptedexception ie) System.out.println("Child Interrupted"); System.out.println("Child Exited"); class ThreadDemo public static void main(string args[]) new NewThread(); try for(int i=5;i>0;i--) System.out.println("Main Thread"+i); Thread.sleep(1000); catch(interruptedexception ie) System.out.println("Main Interrupted"); System.out.println("Main Exiting");

8 OUTPUT: C:\Documents and Settings\User\Desktop\javapgms>java ThreadDemo Child Thread:Thread[Demo Thread,5,main] Main Thread5 Child Thread:5 Child Thread:4 Main Thread4 Child Thread:3 Child Thread:2 Main Thread3 Child Thread:1 Child Exited Main Thread2 Main Thread1 Main Exiting

9 PROGRAM:3 WAP to implement Server and connect to server through Client //MyServer.java import java.io.*; import java.util.*; import java.net.*; public class MyServer ServerSocket ss; Socket s; DataInputStream din; public MyServer() try System.out.println("Server started"); ss=new ServerSocket(8); s=ss.accept(); System.out.println("Client Connected"); din=new DataInputStream(s.getInputStream()); ServerChat(); catch(exception e) System.out.println(e); public void ServerChat()throws IOException String str; do str=din.readutf(); System.out.println("Client message:"+str); while(!str.equalsignorecase("stop")); public static void main(string args[]) new MyServer(); //MyClient.java import java.io.*; import java.util.*; import java.net.*;

public class MyClient Socket s; DataOutputStream dout; public MyClient() try s= new Socket("localhost",8); dout=new DataOutputStream(s.getOutputStream()); ClientChat(); catch(exception e) System.out.println(e); public void ClientChat()throws IOException BufferedReader br= new BufferedReader(new InputStreamReader(System.

10 public class MyClient Socket s; DataOutputStream dout; public MyClient() try s= new Socket("localhost",8); dout=new DataOutputStream(s.getOutputStream()); ClientChat(); catch(exception e) System.out.println(e); public void ClientChat()throws IOException BufferedReader br= new BufferedReader(new InputStreamReader(System.in)); String str1; do str1=br.readline(); dout.writeutf(str1); dout.flush(); while(!str1.equalsignorecase("stop")); public static void main(string args[]) new MyClient(); OUTPUT:

Java Networking. Ajay Khatri

Java Networking. Ajay Khatri Java Networking Ajay Khatri Java Networking Connecting two or more computing devices together so that we can share resources. Advantage of Java Networking Sharing resources Centralize software management