final core java

8/13/2019 Final Core Java

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C T GROUP OF INSTITUTIONS

JALANDHAR

BS-210 Core Java Programming

Lab Manual

BSc IT (4)

Computer Application


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LIST OF EXPERIMENTS

1. Write a Program to Input a String and display it on screen.

2. Write a Program to compute the area of a circle using variables.

3. Write a Program to add two numbers using Command Line Arguments.4. Write a Program to check whether the given number is Even or Odd using if-else

statement.5. Write a Program to determine the season of a particular month .

6. Write a Program to display menu (Add, Sub. Mul, Div) using switch statement.

7. Write a Program to find the factorial of a given number using while statement.8. Write a Program to reverse a 5digit number and calculate sum of its digits using for

statement.

9. Write a Program to that uses continue to print a triangular multiplication for 1 to 4.

12 4

3 6 94 8 12 16

10. Write a Program to sort a list of 7 numbers in ascending order .11. Write a Program to generate a Floyd triangle using 2D array.

0

1 23 4 5

6 7 8 9

12. Write a Program to make a class and introduce methods and fields.

13. Write a Program to create a class using constructor statements.14. Write a Program to demonstrate the fundamentals of inner class.

15. Write a Program to inherit the property of one class into another.16. Write a Program to inherit the property of a base class in derived class using super

statement.

17. Write a Program to make a package.

18. Write a Program to handle Arithmetic exception using try - catch statement.19. Write a Program to implement nested try - catch statements.

20. Write a Program to create thread and control main thread.

21. Write a Program to create multiple threads.

22. Write a Program to display This is an Applet string on an applet.23. Write a Program to make a simple moving banner applet.

24. Write a Program to implement URL class on applet.

25. Write a Program to display IP address of a system.26. Write a Program to display hostname of a system.27. Write a Program to display protocol, hostname, port & file name of a system.

28. Write a Program for chatting using tcp/ip socket

29. Write a Program to set the AWT component controls.30. Write a Program to insert, delete, and update a table using JDBC-ODBC connection.


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INTRODUCTION TO JAVA

Java language was developed by Sun Microsystem in the year 1991 as a part of greenproject.

GREEN PROJECT:

a research group was working to develop software to control consumer electronicsdevices, during this time they developed a device called " star 7"

for which the operating system was planned to be developed in "c++"

however one of the team member "James Gosling " was not very satisfy with the

performance of c++ hence he developed a new language for start he named it as "oak".he used to see an oak outside his office

in 1995 Sun Microsystem renamed this language as java.

FEATURES OF JAVA:

1) Object Oriented Programming

2) Platform Independent3) Robust

4) Reliable, Safe & Secure

5) Compiler and Interpreter6) Dynamic

7) Multithreaded

8) High perfomance

9) Portable10) Simple & Easy to learn

Object Oriented

o Object oriented throughout - no coding outside of class definitions,including main().

o An extensive class library available in the core language packages.Platform Independence

o The Write-Once-Run-Anywhereideal has not been achieved (tuning fordifferent platforms usually required), but closer than with other languages.

Robust

o Exception handling built-in, strong type checking (that is, all data must bedeclared an explicit type), local variables must be initialized.


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Security

o No memory pointerso

Programs runs inside thevirtual machinesandbox.

o Array index limit checkingsecurity manager - determines what resources a class can access such as

reading and writing to the local disk

Compiler/Interpreter

o Code is compiled to bytecodes that are interpreted by a Java virtualmachines (JVM) .

o This provides portability to any machine for which a virtual machine hasbeen written.

o The two steps of compilation and interpretation allow for extensive codechecking and improved security.

Dynamic Binding

o The linking of data and methods to where they are located, is done at run-time.

o New classes can be loaded while a program is running. Linking is done onthe fly.

o Even if libraries are recompiled, there is no need to recompile code thatuses classes in those libraries.

This differs from C++, which uses static binding. This can result infragileclasses for cases where linked code is changed and memory pointers then

point to the wrong addresses.

High Performance

o Interpretation of bytecode slowed performance in early versions, butadvanced virtual machines with adaptive and just-in-time compilation and

other techniques now typically provide performance up to 50% to 100%

the speed of C++ programs.

Threading

o Lightweightprocesses, called threads, can easily be spun off to performmultiprocessing.

o Can take advantage of multiprocessors where availableo Great for multimedia displays.
http://www.particle.kth.se/~lindsey/JavaCourse/Book/Part1/Supplements/Chapter01/JVM.htmlhttp://www.particle.kth.se/~lindsey/JavaCourse/Book/Part1/Supplements/Chapter01/JVM.htmlhttp://www.particle.kth.se/~lindsey/JavaCourse/Book/Part1/Supplements/Chapter01/JVM.htmlhttp://www.particle.kth.se/~lindsey/JavaCourse/Book/Part1/Supplements/Chapter01/JVM.html


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What is the Java Virtual Machine?

The JVM is the software that executes Java bytecode. A Java program, written in a file

with a .java extension, is compiled into class files that have a .class extension. The classfiles are written in bytecode. To execute these files, the computer uses the JVM to

interpret the bytecode.

A browser that is capable of executing Java applets has the JVM built into it. To run a

Java application, the Java Runtime Environment (JRE) must be installed. The JRE

contains the files in the Java Development Kit minus the development tools, only the filesnecessary to run a Java application are present.

The bytecode is the same for all platforms, but the JVM will be different on differentplatforms because it needs to execute programs using the native code of the machine it is

running on.

Development Tools: The development tools provide everything you'll need for

compiling, running, monitoring, debugging, and documenting your applications. As a

new developer, the main tools you'll be using are the javaccompiler, the javalauncher,

and the javadocdocumentation tool.

What is an Object

Object is instance of class, it contain data as well as behavior of the functions how to

manipulate that data.

What is a Class

Class is a collection of similar objects.

A class is a blueprint or prototype from which objects are created.
http://java.sun.com/docs/books/tutorial/java/concepts/object.htmlhttp://java.sun.com/docs/books/tutorial/java/concepts/class.htmlhttp://java.sun.com/docs/books/tutorial/java/concepts/class.htmlhttp://java.sun.com/docs/books/tutorial/java/concepts/object.html


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EXPERIMENT NO. 1

Aim : - Write a program to Input a String and display it on screen

Explanation:- This is a simple program in java to display strings.

Program :-

class first

{

public static void main(String str[])

{String s=String.valueOf(str[0]);

System.out.println("your input is----------> "+s);

}}

Output:-

Viva -Voice Questions:

1. What do you mean by object oriented programming.2. What is the difference between java and c++.3. What is class.4. What is object.


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EXPERIMENT NO. 2

Aim :- Write a program to compute the area of a circle.

Explanation :-This program demonstrate the uses of datatypes and variables to compute

area of a circle.

Program :-

class radius{


{

int r;double a;

float pi=3.1416f;

r=Integer.parseInt(str[0]);a=pi*r*r;

System.out.println("Area of a circle is="+a);

}}

Output :-


1. What is datatypes.2.

What is variable.3. What is the difference between object and variable?

4. Why do I have to put an f after a floating point constant?


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EXPERIMENT NO. 3

Aim -: Write a program to add two integer numbers using

command line argument.

Explanation -:This program enable the user to add two integer numbers using command

line

Program -:

class add

{public static void main(String str[])

{

int a,b,c;

a=Integer.parseInt(str[0]);b=Integer.parseInt(str[1]);

c=a+b;

System.out.println("Sum Is =- " + c);}

}

Output :-


1. What do you mean by command line argument programming.2. What java uses compiler , interpreter or both.3. Can I compile group of java files once?


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EXPERIMENT NO. 4

Aim: - Write a program to check whether the given number is even

or odd using if-else statements.

Explanation :-This program demonstrate the simple use of if else by checking the

number using modulo operator.

Program :-class check

{

public static void main(String str[]){

int a;

a=Integer.parseInt(str[0]);

if(0==a%2){

System.out.println("given no. is="+a);System.out.println("Number is Even ");

}

else{

System.out.println("given no. is="+a);

System.out.println("Number is Odd ");

}} }

Output :-

Viva - Voice Questions:

1. What is reserve word and how many?.2. What is the difference between division and modulo operator.3. What is jvm4. What is jdk


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EXPERIMENT NO. 5

Aim :- Write a program to determine which season a particular

month.

Explanation :-This program is uses the logical operator with ladder if else statement.

Program :-class season

{


{int a;String s;

a=Integer.parseInt(str[0]);

if(a==12||a==1||a==2)

s=Winter;else

if(a==3||a==4||a==5)

s=Spring;else

if(a==6||a==7||a==8)

s=Summer;else

if(a==9||a==10||a==11)

s=Autom;

else

s=Bogus Month;System.out.println(Enter month number is the :+s)

} }

Output :-


1. What is the difference between logical and bitwise operator.2. What is byte code3. What language is the Java compiler and JVM written in?


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d=b/c;

System.out.println("division="+d);

break;}

default : {

System.out.println("Enter correct choice");}}

k++;

}while(k


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EXPERIMENT NO. 7

Aim: - Write a program to find the factorial of a given number

while statement.

Explanation :- While statement is entry controlled loop statement 1stit evaluate

condition then body of the code is executed.

Program :-

class fact

{


int num,fac=1,i=1;

num=Integer.parseInt(str[0]);

while(num>=i)

{fac=fac*i;

i++;

}

System.out.println(Factorial of a given no is=+fac);

}

}

Output :-


1. What is the difference between while and do while loop.2. What is the difference between break and continue statements.


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EXPERIMENT NO. 8

Aim :-Write a program to reverse a 5digit number and calculate

sum of its digit using for loop.

Explanation :- forstatement is entry controlled loop statement 1stit evaluate condition

then body of the code is executed in this we can reverse any integer number..

Program :-

class rev{


{

int a,b,sum=0,rev=0;a=Integer.parseInt(str[0]);

for(;a>0;){

b=a%10;rev=rev*10+b;

sum=sum+b;

a=a/10;}

System.out.println("revers is "+rev);

System.out.println("sum of the digit "+sum);}

}Output :-

VivaVoice Questions:

1. What is the type casting.2. How many types we can convert data


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EXPERIMENT NO. 9

Aim: -Write a program to that use continue to print a triangular

multiplication for 1 to 4.12 4

3 6 94 8 12 16

Explanation :-for statement is entry controlled loop statement 1stit evaluate condition

then body of the code is executed. This is the nesting of for statement with continue label.

Program :-class table

{


huk:

for(int i=1;i


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EXPERIMENT NO. 10

Aim:-Write a program to sort a list of 7 numbers in ascending

order

Explanation :-Thisprogram demonstrate the uses of array, how to initialize and how tocreate memory for array elements.

Program :-

class order{


{

int a[],n;a=new int[10];

for(int i=0;i


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EXPERIMENT NO. 11

Aim :-Write a program to generate a pattern using 2D array.0

1 2

3 4 56 7 8 9

Explanation :-Thisprogram demonstrate the uses of 2D array, how to initialize and how

to create memory for array elements.

Program :-class pattern


{int toD[][]=new int[4][];

toD[0]=new int[1];toD[1]=new int[2];

toD[2]=new int[3];

toD[3]=new int[4];int i,j,k=0;

for(i=0;i


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EXPERIMENT NO. 12

Aim :-Write a program to make a class and introduce method and

field.Explanation :-This programtells the uses of creating class ,method and field.Program :-

class democlass{


{

demo obj=new demo();demo obj1=new demo();

obj.w=10;obj.h=20;

obj.l=30;

obj1.w=12;obj1.h=22;obj1.l=17;

obj.disp();

obj1.disp();}}

class demo

{int w,h,l;

void disp()

{System.out.println("volum is");

System.out.println(w+h+l);

}}Output-:


1. What is class2. What is the difference between structured and object oriented programming.3. What is the difference between class and structure4. What are the access modifier.


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EXPERIMENT NO. 13

Aim :-Write a program to creat a class using constructor.Explanation :-This program tells the uses of constructor ,how to use in classes.

Program :-

class democlass

{


{

System.out.println("object one is");demo obj=new demo();

int v=obj.vol();

System.out.println(+v);System.out.println("object two is");

demo obj1=new demo();

int k=obj1.vol();

System.out.println(+k);}

}

class demo{

int w,h,l;

demo(){

System.out.println("calling constructor");

System.out.println("volum is");w=10;

h=15;

l=20;

}int vol()

{

return(w*l*h);}

}


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EXPERIMENT NO. 14

Aim :-Write a program to demonstrate the fundamental of innerclass.Explanation :-This program demonstrate the fundamentals of inner class.

Program :-

class innerclass

{


{outer obj=new outer();

obj.test();}

}class outer

{

int w=25;void test()

{

inner in=new inner();

in.disp();}

class inner{

void disp()

{

System.out.println("outer class data is"+w);}

}

}Output-:


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1. What does it mean that a method or field is "static"?2. how many public class are possible in java3. What is the difference between jre and java?


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EXPERIMENT NO. 15

Aim-: Write a program to inherit a property of one class to

another.

Explanation -:This program enable the user to inherite the property of a base class into

the derived class.

Program -:class inherit

{


parent a=new parent();

child b=new child();a.i=10;a.j=20;

System.out.println("content of parent class");

a.show();System.out.println();

b.i=15;

b.j=25;

b.k=35;System.out.println("content of child class");

b.show();

b.showc();System.out.println();

b.sum();

}

}class parent

{

int i,j;void show()

{

System.out.println("i and j = "+i+" "+j);

}}

class child extends parent{

int k;

void showc(){


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EXPERIMENT NO. 16

Aim-:Write a program to inherite a property of a base class in

derived class using super statement

Explanation -:This program enable the user to inherite the property of a base class into

the derived class using supper statement supper is the 1ststatement of constructor.

Program -:

class item

{int itemno;

String disc;

float rate;int qoh;

void disp()

{System.out.println("item class");

System.out.println("item no is"+itemno);

System.out.println("disc is"+disc);

System.out.println("reate is"+rate);System.out.println("quantity is"+qoh);

}

item(){

itemno=0;

disc=" ";

rate=0;qoh=0;

}

item(int n,String s,float r,int q){

itemno=n;

disc=s;rate=r;

qoh=q;

}}


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EXPERIMENT NO. 17

Aim-:Write a program to make a package.

Explanation -:This program enable the user to make a own packageand uses the property

of a package class into the derived classes.

Program -:import huk.*;

class mypack


{

pack obj=new pack("husain ullah khan",12398.45);obj.show();

}

}

Output:-

Viva

Voice Questions:

1. What is packages2. What is class libraries3. Why can't the compiler find my package?


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EXPERIMENT NO. 18

Aim-:Write a program to handle Arithmetic exception using trycatch statement.

Explanation -:This program enable the user to handle the exception using try catch

statement.

Program -:class excep

{


int i=0,j;try{

j=39/i;}

catch(Exception e)

{System.out.println(I am handling exception);

System.out.println(e);

}

}

Output:-


1. what is exception .2. what are the advanteges of exception.3. What is the super class of exception.


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EXPERIMENT NO. 19

Aim-: Write a program to implement nested try catch statement.

Explanation -:This program enable the user handle exception using multiple try catch

statements

Program -:class excep


{

try{

int i=str.length;System.out.println(i);

int b=33/i;

int c[]={1};

}

catch(ArithmeticException e){

System.out.println(I am handling exception);

System.out.println(e);}

Catch(ArrayIndexOutOfBoundsException e)

{

System.out.println(I am handling exception);System.out.println(e);

} } }

Output:-


1. what are the keywords to handle exception.2. What is the difference between throw and throws.3. List any five exception name.


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EXPERIMENT NO. 20

Aim-: Write a program to create Thread and control main thread.

Explanation -:This program enable the user to create thread and how to control the main

thread

Program -:class demoth


{

int i=5;

Thread t=Thread.currentThread();System.out.println("current thread "+t);

t.setName("mythread ");

System.out.println("changed thread "+t);try{

for(;i>0;)

{System.out.println(i);

Thread.sleep(1000);

i--;} }

catch(Exception e)

{

System.out.println("interupted thread");} }

}

Output:-


1. Define thread2. How many types we can create threads3. What is the advanteg of threading


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catch(Exception e)

{

System.out.println(name+"Interupted");}

System.out.println(name+"Exited");

}}

Output:-


1. what is the advanteg of multi threading programming2. what is thread model3. what are the methods in thread class


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EXPERIMENT NO. 22

Aim-: Write a program to display This is an Applet string on an

applet.

Explanation -:This program demonstrate the user make internet programming using

Applet.

Program -:import java.awt.*;

import java.applet.*;

/*

*/public class app extends Applet

{String msg="This is an Applet";

public void init()

{

setBackground(Color.cyan);setForeground(Color.red);

start( );

}

public void paint(Graphics g){Font f=new Font("Monotype

Corsiva",Font.BOLD+Font.ITALIC,14);

g.setFont(f);g.drawString(msg,50,30);

}}

Output:-


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EXPERIMENT NO. 23

Aim-: Write a program to make a simple moving banner applet.

Explanation -:This program demonstrate the user to make banner on an appletprogramming

Program -:import java.awt.*;

import java.applet.*;

/*

*/public class SimpleBanner extends Applet implements Runnable

{

String msg="A Simple Banner Applet";Thread t=null;

boolean stopflag;

public void init(){

setBackground(Color.cyan);

setForeground(Color.red);}

public void start()

{

t=new Thread(this);stopflag=false;

t.start();

}public void run()

{

char ch;

for(;;){

try

{

repaint();Thread.sleep(250);

ch=msg.charAt(0);msg=msg.substring(1,msg.length());msg+=ch;

if(stopflag)

break;}

catch(Exception e)

{


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System.out.println("Exception :"+e);

}

}}

public void stop( )

{stopflag=true;t=null;

}

public void paint(Graphics g){

g.drawString(msg,50,30);

}

}

Output:-


1. What is graphics class in applet?2. What are the advantages of applet?


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EXPERIMENT NO. 24

Aim-: Write a program to implement URL class on applet.

Explanation -:This program enable the user to implement url on an appletProgram -:

import java.awt.*;

import java.applet.*;import java.net.*;

public class App1 extends Applet

{

public void start(){ AppletContext ac=getAppletContext();

URL u=getCodeBase();

Try

{ac.showDocument(new URL(u+"test.html"),"_parent");

}

catch(Exception e){

showStatus("URL not found");

} }}

Output:-


1. what is url2. what is the difference between codebase and getcodebase method


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EXPERIMENT NO. 25

Aim :- Write a program to display IP address of a system.

Explanation -:This is the simple network program to find ip address of a system

Program -:

import java.net.*;

public class ipadd{

public static void main(String args[])

{

try{

InetAddress i=InetAddress.getLocalHost( );

String s=i.toString( );System.out.println(s.substring(s.indexOf(/)+1));

}

catch(Exception e){

System.out.println(Exception : +e);

}

}}

Output:-

Viva

Voice Questions:

1. what is ip addressing scheme2. what is internet protocol3. what are the different classes of addressing scheme


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EXPERIMENT NO. 27

Aim :- Write a program to display protocol, host name , port and

filename of a system.

Explanation -:This program enable the user to display protocol hostname, port and file

of a sysytem

Program:-

import java.net.*;

public class host{ public static void main(String args[])

{ try {

InetAddress i=InetAddress.getLocalHost( );

String s=i.toString( );

System.out.println(s.substring(0,(s.indexOf("/"))));

} catch(Exception e) {

System.out.println("Exception : "+e);

} } }

Output:-

Viva Questions:1. what is the difference between port and socket2. what is protocol


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EXPERIMENT NO. 28

Aim :- Write a program for chatting using tcp/ip socket

Explanation -:This program enable the user to chat with tcp/ip socket

Program:-

import java.net.*;

import java.io.*;

public class ChatServer{


{

try{

BufferedReader br=new BufferedReader(new

InputStreamReader(System.in));ServerSocket ss=new ServerSocket(2345);

Socket skt=ss.accept( );

BufferedReader skt_in=new BufferedReader(newInputStreamReader(skt.getInputStream( )));

PrintStream skt_out=new PrintStream(skt.getOutputStream( ));

while(true)

{System.out.println(skt_in.readLine( ));

skt_out.println(What is your name);

yourname=skt_in.readLine( );System.out.println(yourname);

String s=skt_in.readLine( );

System.out.println(s);

String myname=br.readLine( );skt_out.println(myname);

break;

}while(true)

{

String recv=skt_in.readLine( );

System.out.println(yourname+:+recv);

String send=br.readLine( );skt_out.println(send);

}

}catch(Exception e)

{

System.out.println(Exception :+e);}} }


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// CLIENT

import java.net.*;

import java.io.*;public class ChatClient{


{try

{

BufferedReader br=new BufferedReader(new

InputStreamReader(System.in));Socket skt=new Socket(rungtaibm,2345);

BufferedReader skt_in=new BufferedReader(new

InputStreamReader(skt.getInputStream( )));PrintStream skt_out=new PrintStream(skt.getOutputStream( ));

while(true)

{

skt_out.println(hello can I connect);skt_out.println(skt_in.readLine( ));

String myname=br.readLine( );

skt_out.println(myname);skt_out.println(What is yours);

String yourname=skt_in.readLine( );

System.out.println(yourname);

break;}

while(true)

{String send=br.readLine( );

skt_out.println(send);

String recv=skt_in.readLine( );System.out.println(yourname +:+recv);

}

}

catch(Exception e){

System.out.println(Exception :+e);

}

}}


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OUTPUT :

TCP Server

TCP Client


1. What is tcp/ip protocol2. In which layer tcp/ip protocol exist3. Is tcp/ip is connectinless or connectin oriented.4. What is the difference between ARP and RARP


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EXPERIMENT NO. 29

Aim-:Write a program to set the awt component controls.

Explanation -:This program enable the user to make graphical user interface

Program -:

Import java.awt.*;Import java.applet.*;

Public class comp extends Applet

{

BorderLayout b1=new Borderlayout();Button b1,b2,b3,b4;

Label l1,l2;

Public void init()

{b1=new Button (ok);

b2=new Button (cancel);

b3=new Button (ok);b4=new Button (cancel);

l1=new label(are u sure ?);

l2=new label(are u sure?);setLayout(null);

b1.setBounds(20,20,100,20);

b2.setBounds(20,30,110,30);

b3.setBounds(20,40,120,40);

b4.setBounds(20,40,120,40);l1.setBounds(20,50,130,50);

l2.setBounds(20,60,140,60);Add(b1);Add(b2);Add(b3);Add(b4);Add(l1);Add(l2);

}}

Output-:


1. what is awt components.2. what is the difference betweem awt and swing component3. what is team class


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EXPERIMENT NO. 30

Aim-:Write a program to insert, delete and update a table using

JDBC-ODBC connection .

Explanation -:This program enable the user to work with databaseProgram -:import java.sql.*;

import java.util.*;class badabase

{

Public static void main(String str[])

{Try

{

Resultset rs;

Class.forName(sun.jdbc.odbc.jdbcodbcDriver);String url=jdbc:odbc:huk;

Connection con;

Con=DriverManager.getconnection(url);Statement set=con.createstatement();

Rs=ser.executeQuery(Select * from db);

String ins=Insert into db values(husain,it,539);String del=Delet form db where name =huk;

preparedStatement set=con.preparedstatement(ins);

set.getString(1,huk);

set.executeupdate();con.commit();

while(rs.next()){

System.out.println(rs.getString(1)+ +rs.getString(2);

}

Con.close();}

Catch(exception e)

{

Sysstem.out.println(no such class);

}}}


final core java

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