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Note: This manual is not followed strictly in the GKMCET. This isonly a reference material created by students.
Prepared by
V.Harish
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CONTENTS
Ex No Date Title Page No Remarks
01IMPLEMENTATION OF RATIONAL
NUMBERS3
02IMPLEMENTATION OF DATE
CLASS5
03IMPLEMENTATION OF LISP-LIKE-
LIST 7
04IMPLEMENTATION OF JAVA
INTERFACE FOR ADT STACK 9
05IMPLEMENTATION OF
POLYMORPHISM 13
06IMPLEMENTATION OF OBJECT
SERILIZATION16
07IMPLEMENTATION OF SCENTIFIC
CALCULATOR USING EVENT
DRIVEN PROGRAMMING20
08IMPLEMENTATION OF MULTI
THREADED PROGRAM25
09PROGRAM FOR SIMPLE OPAC
SYSTEM FOR LIBRARY 29
10IMPLEMENTATION OF MULTI-
THREADED ECHO SERVER34
EX.NO:01DATE:
IMPLEMENTATION OF RATIONAL NUMBERS
AIM:
To develop Rational number class in Java. Use JavaDoc comment for documentation.Your implementation should use efficient representation for a rational number, i.e. (500 /1000) should be represented as ().
ALGORITHM:
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STEP 1:Get two inputs from the user through command line arguments.
STEP 2:Store the numerator to variable a and denominator to variable b.
STEP 3:If both a and b are either positive or negative, set the flag as 0.
STEP 4:If either a or b is negative, set flag as 1.
STEP 5:Compare the values of a and b and assign the lowest value to c.
STEP 6:Set the for loop for i=2.STEP 7:If both a and b values are divisible by i, then perform
(i) a=a/i;
(ii) b=b/i;
(ii) i=1;
STEP 8:Repeat the loop if the value of i is less than c. Break the loop if the condition fails.
STEP 9:If flag is 1, display the result as negative number; else display it as positive number.
PROGRAM:
import java.io.*;public class rat{
public static void main(String[] args){Rational a=new Rational(35,50);System.out.println("\na="+a);}}class Rational{
public Rational(int num,int denum){numerator=num;if(denum==0)denuminator=1;elsedenuminator=denum;makeRational();}
private void makeRational()
{int gcd;int divisor=0;if(denuminator
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{int remainder=n %d;while(remainder!=0){n=d;d=remainder;remainder=n%d;}return d;}
public String toString(){String result=EMPTY_STRING;if(denuminator==1)result=String.valueOf(numerator);else{
result=result.concat(String.valueOf(numerator));result=result.concat("/");result=result.concat(String.valueOf(denuminator));}return result;}
private static final String EMPTY_STRING="";private int numerator;private int denuminator;}
OUTPUT:
C:\jdk1.6.0_17\bin>javac rat.javaC:\jdk1.6.0_17\bin>java rata=7/10C:\jdk1.6.0_17\bin>
RESULT:
Thus the program Implementation of rational numbers has been successfullyexecuted verified and successfully.
EX.NO:02
DATE:
IMPLEMENTATION OF DATE CLASS
AIM:
To develop Date class in Java similar to the one available in java.util package. UseJavaDoc comments.
ALGORITHM:
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STEP 1:Create a package which consists of constructors with the following arguments: i) Default
ii)Taking 3 arguments year, day and month iii)Taking 5 arguments year, day, month, hours and minutes iv)Taking 6 arguments year, day, month, hour, minutes and secondsSTEP 2:Get the year, month, date, hours, minutes, seconds using the getYear(),
getMonth(), getDate(), getHours(), getMinutes(), getSeconds() methods.STEP 3:Set all these details using set methods.STEP 4:After()-the after() method returns true if the current date comes after the
specified date else it returns falseSTEP 5:Before()-the before()method returns true if the current date comes before the
specified date else it returns falseSTEP 6:Compare()-the compare() method compares the current date with the specified
date and returns 0 if it is equal,if after it returns 1 and if before it returns -1.
PROGRAM:
import java.io.*;import java.util.Date;public class Dateclass{
public static void main(String args[]){Date d1=new Date();try{Thread.sleep(10);}
catch(Exception e){}Date d2=new Date();System.out.println("First date:"+d1);System.out.println("Second date:"+d2);System.out.println("In second date after first:"+d2.after(d1));int result=d1.compareTo(d2);if(result>0)System.out.println("First date is after second date");else if(resultjavac DateClass.java
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C:\jdk1.6.0_17\bin>java DateClassFirst date:Wed Sep 29 20:23:17 GMT+05:30 2010Second date:Wed Sep 29 20:23:17 GMT+05:30 2010In second date after first:trueFirst date is before second dateFri Jan 01 05:30:00 GMT+05:30 1971Milli Second since jan-1-1970 00:00:00:IST:31536000000
RESULT:
Thus the program Implementation of date class has been successfully executedverified and successfully.
EX.NO:03
DATE:
IMPLEMENTATION OF LISP-LIKE-LIST
AIM:
To implement Lisp-like list in Java. Write basic operations such as 'car', 'cdr', and'cons'. If L is a list [3, 0, 2, 5], L.car() returns 3, while L.cdr() returns [0,2,5].
ALGORITHM:
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STEP 1:Create a node of a list having data part and link part.STEP 2:Create a menu having the following choices : insert, car, cdr, adjoin and display.STEP 3:Read the choice from the user and call the respective m ethods.STEP 4:Create another class which implements the same interface to implement the
concept of stack through linked list.
INSERT
STEP 1: Create an object of node and append to the list.
CAR
STEP 1:Return the first node data.
CDR
STEP 1:Return all the node (data part) in the list except the first node.
ADJOINSTEP 1:Check if the node to be inserted is already present in the list, if not present append to the list.
PROGRAM:
import java.util.*;class Lisp{
public int car(List l)
{Object ob=l.get(0);String st=ob.toString();return Integer.parseInt(st);}
public List cdr(List l){Object ob=l.remove(0);Object obj[]=l.toArray();List list=Arrays.asList(obj);return list;
}public static void main(String[] args){List l=new ArrayList();l.add(3);l.add(0);l.add(2);l.add(5);Lisp L=new Lisp();int val=L.car(l);System.out.println(val);
List list=L.cdr(l);System.out.println(list);
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STEP 1:Create an interface which consists of three methods namely PUSH, POP andDISPLAY
STEP 2:Create a class which implements the above interface to implement the conceptof stack through Array
STEP 3:Define all the methods of the interface to push any element, to pop the topelement and to display the elements present in the stack.
STEP 4:Create another class which implements the same interface to implement theconcept of stack through linked list.
STEP 5: Repeat STEP 4 for the above said class also.STEP 6:In the main class, get the choice from the user to choose whether array
implementation or linked list implementation of the stack.STEP 7:Call the methods appropriately according to the choices made by the user in the
previous step.STEP 8:Repeat step 6 and step 7 until the user stops his/her execution
PROGRAM:
import java.util.*;public class ListStack implements Stack{
public ListStack(){topOfStack=null;}
public boolean isEmpty(){return topOfStack==null;
}public void push(Object x){topOfStack=new ListNode(x,topOfStack);}
public void pop(){if(isEmpty())throw new UnderflowException("ListStack pop");System.out.println(topOfStack.element+"is deleted");topOfStack=topOfStack.next;
}public void display(){DispNode=topOfStack;while(DispNode!=null){System.out.println(DispNode.element+" ");DispNode=DispNode.next;}}
public static void main(String[] args)
{Scanner in=new Scanner(System.in);
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ListStack theList=new ListStack();int data=10;int choice;do{System.out.println();System.out.println("-------------------------------------------------------------------");
System.out.println("STACK IMPLEMENTATION USING LINKED LIST");System.out.println("-------------------------------------------------------------------");System.out.println();System.out.println("1.PUSH");System.out.println("2.POP");System.out.println("3.DISPLAY");System.out.println("4.EXIT");System.out.println("\n ENTER YOUR CHOICE:");choice=in.nextInt();
switch(choice){case 1:System.out.println("\n enter the element to push:");data=in.nextInt();theList.push(data);
break;case 2:theList.pop();
break;case 3:
System.out.println("the Stack elements are:");theList.display();
break;case 4:
break;default:System.out.println("wrong choice");}}while(choice!=4);}
private ListNode topOfStack;private ListNode DispNode;}class UnderflowException extends RuntimeException{
public UnderflowException(String message){super(message);}}interface Stack
{void push(Object x);
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void pop();void display();
boolean isEmpty();}class ListNode{
public ListNode(Object theElement){this(theElement,null);}
public ListNode(Object theElement,ListNode n){element=theElement;next=n;}
public Object element;public ListNode next;
}
OUTPUT:
C:\jdk1.6.0_17\bin>javac ListStack.javaC:\jdk1.6.0_17\bin>java ListStack------------------------------------------------------------------STACK IMPLEMENTATION USING LINKED LIST------------------------------------------------------------------
1. PUSH2. POP3. DISPLAY4. EXITENTER YOUR OPTION:1Enter the element to push:100-------------------------------------------------------------------STACK IMPLEMENTATION USING LINKED LIST-------------------------------------------------------------------1. PUSH2. POP
3. DISPLAY4. EXITENTER YOUR OPTION:3100-------------------------------------------------------------------STACK IMPLEMENTATION USING LINKED LIST-------------------------------------------------------------------1. PUSH2. POP3. DISPLAY4. EXIT
ENTER YOUR OPTION:2100is deleted
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-------------------------------------------------------------------STACK IMPLEMENTATION USING LINKED LIST-------------------------------------------------------------------1. PUSH2. POP3. DISPLAY4. EXITENTER YOUR OPTION:3-------------------------------------------------------------------STACK IMPLEMENTATION USING LINKED LIST-------------------------------------------------------------------1. PUSH2. POP3. DISPLAY4. EXIT
RESULT:
Thus the program Implementation of java interface for ADT stack has been successfullyexecuted verified and successfully.
EX.NO:05
DATE:
IMPLEMENTATION OF POLYMORPHISM
AIM:
To design a Vehicle class hierarchy in Java. Write a test program to demonstratePolymorphism.
ALGORITHM:
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STEP 1: Create an abstract class named vehicle with abstract method Display and aconcrete method Input.
STEP 2: Define the input method by prompting the user to enter the values for name,owner, type, number, engine capacity, seating capacity for the vehicle; all theinputs taken in the form string.
STEP 3: Extend three classes namely Air, Water and Land from the base class.STEP 4: Define the method display under the class Air by displaying all the entered values.STEP 5: Repeat step 4 for the class Water.STEP 6: Extend the input method for the class Land by taking in the value of wheeling
capacity for the vehicle in the form of string.STEP 7: In the main method create a reference for the abstract class and create a switch case to perform operations on the opted class.STEP 8: Under each class create a switch case to either enter the data or to display the transport report.STEP 9: Repeat the main menu on the user's choice.STEP 10: Create array of objects under each class and call the methods by assigning the
values of the created objects to the reference object, to show polymorphism.
PROGRAM:
import java.io.*;public class VehicleTest{
public static void main(String[] args){Vehicle corvette=new Corvette("Corvette","red",545000);
Vehicle bettle=new Bettle("Bettle","blue",445000);Vehicle porsche=new Porsche("Porsche","black",625000);Vehicle vehicle=new Vehicle();vehicle=porsche;System.out.println("Name="+corvette.getName()+"\nColor="+corvette.getColor()+"\nPrice="+corvette.getPrice()+"\n\n");System.out.println("Name="+bettle.getName()+"\nColor="+bettle.getColor()+"\nPrice="+bettle.getPrice()+"\n\n");System.out.println("Name="+porsche.getName()+"\nColor="+porsche.getColor()+"\nPrice="+porsche.getPrice()+"\n\n");}
}class Vehicle{String name;String color;double price;
public Vehicle(){name="";color=" ";
price=0;
}public Vehicle(String name,String color,double price)
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{this.name=name;this.color=color;this.price=price;}
public String getName(){return name;}
public String getColor(){return color;}
public double getPrice(){return price;}
}class Bettle extends Vehicle{
public Bettle(String name,String color,double price){super(name,color,price);}}class Corvette extends Vehicle{
public Corvette(String name,String color,double price)
{super(name,color,price);}}class Porsche extends Vehicle{
public Porsche(String name,String color,double price){super(name,color,price);}}
OUTPUT:
C:\jdk1.6.0_17\bin>javac VehicleTest.javaC:\jdk1.6.0_17\bin>java VehicleTest
Name=CorvetteColor=redPrice=545000.0
Name=Bettle
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Color=bluePrice=445000.0
Name=PorscheColor=blackPrice=625000.0C:\jdk1.6.0_17\bin>
RESULT:
Thus the program Implementation of polymorphism has been successfully executed verifiedand successfully.
EX.NO:06
DATE:
IMPLEMENTATION OF OBJECT SERILIZATION
AIM:
To design classes for Currency, Rupee, and Dollar. Write a program that randomly
generates Rupee and Dollar objects and write them into a file using object
serialization. Write another program to read that file, convert to Rupee if it reads aDollar, while leave the value as it is if it reads a Rupee.
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ALGORITHM :
STEP1: Create a class named currency that implements the serializable interface andalso it is the base class for rupee and dollar classes.
STEP 2: Create an object for ObjectOutputStream to open a file in write mode using FileOutputStream.STEP 3: Read the user choice to enter rupee or dollar amount.STEP 4: Generate random numbers as the value of rupee or dollar.STEP 5: If choice is rupee then, append "Rs" to the value generated, else if choice is
dollar append "$" to the value generated.STEP 6: Display the appended String and also write it into the file opened using the
writeObject() method.STEP 7: Close the file.
ALGORITHM FOR PROGRAM 2:STEP 1:Create a class named currency that implements the serializable interface and
also it is the base class for rupee and dollar classes.STEP 2:Create an object for ObjectInputStream to open the file created in program1 inread mode using FileInputStream.
STEP 3: If the file does not exist or if it is empty show exceptions.STEP 4: While the End of file is not reached, do the following... (i) If the value read is a dollar convert into rupee and print to the user otherwise
print the rupee as such.STEP 5: End the program.
PROGRAM:
import java.util.*;import java.io.ObjectOutput;import java.io.FileOutputStream;import java.io.ObjectOutputStream;
class Rupee{
public Rupee(){try{
Object object=new Object();object="45";ObjectOutput out=new ObjectOutputStream(new FileOutputStream("Rupees.dat"));out.writeObject(object);out.close();}catch(Exception e){e.printStackTrace();}}
}class Dollar
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{public Dollar(){try{Object object=new Object();object="45";ObjectOutput out=new ObjectOutputStream(new FileOutputStream("Dollar.dat"));out.writeObject(object);out.close();}catch(Exception e){e.printStackTrace();}}}
public class Currency{public static void main(String args[]){new Rupee();new Dollar();}}//CURRENCY TEST
import java.io.FileInputStream;import java.io.IOException;
import java.io.ObjectInputStream;import java.util.ArrayList;import java.util.*;
public class CurrencyTest{
public static void main(String[] args){System.out.println("Select Input Type");System.out.println("\n1.Dollar\n2.Rupee\n\n");Scanner input=new Scanner(System.in);int choice=input.nextInt();
if(choice==1){System.out.println("Enter No of Dollar:");int noDollar=input.nextInt();String value="";String filename="Dollar.dat";FileInputStream fis=null;ObjectInputStream in=null;try{fis=new FileInputStream(filename);
in=new ObjectInputStream(fis);value=(String)in.readObject();
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in.close();}catch(IOException ex){ex.printStackTrace();}catch(ClassNotFoundException ex){ex.printStackTrace();}System.out.println("The Equal Rupee is:"+noDollar*(Integer.parseInt(value)));System.out.println();}else if(choice==2){System.out.println("Enter Rupee:");int noRupee=input.nextInt();
System.out.println("The Rupee is:"+noRupee);System.out.println();}}}
OUTPUT:
C:\jdk1.6.0_17\bin>javac Currency.javaC:\jdk1.6.0_17\bin>java Currency
C:\jdk1.6.0_17\bin>javac CurrencyTest.javaC:\jdk1.6.0_17\bin>java CurrencyTestSelect Input Type
1.Dollar2.Rupee
1Enter No of Dollar:
45The Equal Rupee is:2025C:\jdk1.6.0_17\bin>java CurrencyTestSelect Input Type
1.Dollar2.Rupee
2Enter Rupee:
45The Rupee is:45
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C:\jdk1.6.0_17\bin>
RESULT:
Thus the program Implementation object serialization has been successfully executed verifiedand successfully.
EX.NO:07
DATE:
IMPLEMENTATION OF SCENTIFIC CALCULATOR USING
EVENT DRIVEN PROGRAMMING
AIM:
To develop a scientific calculator using even-driven programming paradigm of Java.
ALGORITHM:
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STEP 1: Create a panel consisting of Buttons for various scientific operations.STEP 2:Create Button actions.STEP 3: Place the panel onto a frame.STEP 4: Associate each Button click with the corresponding actionlistener.
PROGRAM:
import java.awt.*;import java.awt.event.*;import javax.swing.*;import java.lang.*;
public class Calculator{
public static void main(String[] args){CalculatorFrame frame = new CalculatorFrame();frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);}}class CalculatorFrame extends JFrame{
public CalculatorFrame(){setTitle("Calculator");CalculatorPanel panel = new CalculatorPanel();add(panel);
pack();
}}class CalculatorPanel extends JPanel{
public CalculatorPanel(){setLayout(new BorderLayout());result = 0;lastCommand = "=";start = true;display = new JButton("0");
display.setEnabled(false);add(display, BorderLayout.NORTH);ActionListener insert = new InsertAction();ActionListener command = new CommandAction();
panel = new JPanel();panel.setLayout(new GridLayout(6,5));addButton("7", insert);addButton("8", insert);addButton("9", insert);addButton("/", command);
addButton("CE", command);
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addButton("4", insert);addButton("5", insert);addButton("6", insert);addButton("*", command);addButton("m+", command);
addButton("1", insert);addButton("2", insert);addButton("3", insert);addButton("-", command);addButton("m-", command);
addButton("0", insert);addButton(".", insert);addButton("+/-", command);addButton("+", command);addButton("n!", command);
addButton("pow", command);addButton("1/x", insert);addButton("SQRT", insert);addButton("log", insert);addButton("%", command);
addButton("sin", insert);addButton("cos", insert);addButton("tan", insert);addButton("x2", insert);
addButton("=", command);
add(panel, BorderLayout.CENTER);}
private void addButton(String label, ActionListener listener){JButton button = new JButton(label);
button.addActionListener(listener);panel.add(button);}
private class InsertAction implements ActionListener
{public void actionPerformed(ActionEvent event){String input = event.getActionCommand();if (start==true){display.setText("");start = false;}if(input.equals("1/x"))display.setText(""+1/Double.parseDouble(display.getText()));
elseif(input.equals("SQRT"))
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display.setText(""+Math.sqrt(Double.parseDouble(display.getText())));
elseif(input.equals("log"))display.setText(""+Math.log(Double.parseDouble(display.getText())));
elseif(input.equals("x2"))display.setText(""+Double.parseDouble(display.getText())*Double.parseDouble(display.getText()));
elseif(input.equals("sin")){Double angle=Double.parseDouble(display.getText())*2.0*Math.PI/360.0;display.setText(""+Math.sin(angle));}
else if(input.equals("cos")){Double angle=Double.parseDouble(display.getText())*2.0*Math.PI/360.0;display.setText(""+Math.cos(angle));}elseif(input.equals("tan")){Double angle=Double.parseDouble(display.getText())*2.0*Math.PI/360.0;display.setText(""+Math.tan(angle));}
elsedisplay.setText(display.getText() + input);}}
private class CommandAction implements ActionListener{
public void actionPerformed(ActionEvent event){String command = event.getActionCommand();
if (start==true)
{if (command.equals("-")){display.setText(command);start = false;}elselastCommand = command;}else{
calculate(Double.parseDouble(display.getText()));lastCommand = command;
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start = true;}}}
public void calculate(double x){if (lastCommand.equals("+")) result += x;else if (lastCommand.equals("-")) result -= x;else if (lastCommand.equals("*")) result *= x;else if (lastCommand.equals("/")) result /= x;else if (lastCommand.equals("=")) result = x;else if (lastCommand.equals("CE")) result = 0.0;else if (lastCommand.equals("m+")) result = result;else if (lastCommand.equals("m-")) result = 0.0;else if (lastCommand.equals("pow")){double powval=1.0;
for(double i=0.0;ijavac Calculator.javaC:\jdk1.6.0_17\bin>java CalculatorC:\jdk1.6.0_17\bin>
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RESULT:
Thus the program Implementation of scientific calculator using event driven programming
has been successfully executed verified and successfully.
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EX.NO:08
DATE:
IMPLEMENTATION OF MULTI THREADED PROGRAM
AIM:
To write a multi-threaded Java program to print all numbers below 100,000 that areboth prime and fibonacci number (some examples are 2, 3, 5, 13, etc.). Design athread that generates prime numbers below 100,000 and writes them into a pipe.Design another thread that generates fibonacci numbers and writes them to another
pipe. The main thread should read both the pipes to identify numbers common toboth.
ALGORITHM:
STEP 1: CreateThread1 which generates prime numbers below 100,000 and store inpipe1.STEP 2:Create Thread2 which generates Fibonacci numbers below 100,000 and store in
pipe 2.STEP 3: Write a main program which does the following:
(i) Call the two threads created in step1 and step2.(ii) Read the data from pipe1 and pipe 2 and print the numbers common to both.
PROGRAM:
import java.util.*;import java.io.*;class Fibonacci extends Thread{
private PipedWriter out=new PipedWriter();public PipedWriter getPipedWriter(){return out;}
public void run(){
Thread t=Thread.currentThread();t.setName("Fibonacci:");System.out.println(t.getName()+"Thread stored......");int fibo1=0,fibo2=1,fibo=0;while(true){try{fibo=fibo1+fibo2;if(fibo>100000){
out.close();break;
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}out.write(fibo);sleep(1000);
}catch(Exception e){System.out.println("Fibonacci:"+e);}fibo1=fibo2;fibo2=fibo;}System.out.println(t.getName()+"Thread exiting.");}}class Prime extends Thread{
private PipedWriter out1=new PipedWriter();public PipedWriter getPipedWriter(){return out1;}
public void run(){Thread t=Thread.currentThread();t.setName("Prime:");System.out.println(t.getName()+"Thread stored.......");int prime=1;
while(true){try{if(prime>100000){out1.close();
break;}if(isPrime(prime))out1.write(prime);
prime++;sleep(0);}catch(Exception e){System.out.println(t.getName()+"Thread exiting.");System.exit(0);}} }
public boolean isPrime(int n){
int m=(int)Math.round(Math.sqrt(n));if(n==1||n==2)
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return true;for(int i=2;i
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OUTPUT:
C:\jdk1.6.0_17\bin>javac PipedIo.java
C:\jdk1.6.0_17\bin>java PipedIoMain:Thread sorted......Fibonacci:Thread stored......Prime:Thread stored.......The Numbers Common To PRIME and FIBONACCI:12351389233
159728657Fibonacci:Thread exiting.Main:Thread exiting.Prime:Thread exiting.
C:\jdk1.6.0_17\bin>
RESULT:
Thus the program Implementation of multi threaded program to find Fibonacci series hasbeen Successfully executed and verified successfully.
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EX.NO:09
DATE:
PROGRAM FOR SIMPLE OPAC SYSTEM FOR LIBRARY
AIM:
To develop a simple OPAC system for library using event-driven and concurrentProgramming paradigms of Java. Use JDBC to connect to a back-end database.
ALGORITHM:
STEP 1: Create a Master Database1(Book Details) having the following fields: BookNo.,Book Name, Author, No. of pages, Name of Publisher, Cost.
STEP 2:Create a Master Database2(User Details) having the following fields : UserID,Department
STEP 3: Create a Transaction Database having the following fields: UserID,Book No., Date of Renewal / Date of Return, FineSTEP 4: Create a panel consisting of buttons ADD, UPDATE, DELETE. Associate these button actions with listeners(with Master Database 1)STEP 5: Create a panel consisting of buttons ADD, UPDATE, DELETE. Associate these button actions with listeners(with Master Database 2)STEP 6:Create another panel consisting of buttons UserID, BookID, Return/Renewal,
Fine.STEP 7:Associate these buttons with listeners(with Transaction Database).
EVENT DRIVEN:
import java.sql.*;import java.awt.*;import java.awt.event.*;import javax.swing.*;
public class Datas extends JFrame implements ActionListener{JTextField id;JTextField name;JButton next;JButton addnew;
JPanel p;static ResultSet res;static Connection conn;static Statement stat;
public Datas(){super("Our Application");Container c = getContentPane();c.setLayout(new GridLayout(5,1));id = new JTextField(20);name = new JTextField(20);
next = new JButton("Next BOOK");p = new JPanel();
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c.add(new JLabel("ISBN",JLabel.CENTER));c.add(id);c.add(new JLabel("Book Name",JLabel.CENTER));c.add(name);c.add(p);
p.add(next);next.addActionListener(this);
pack();setVisible(true);addWindowListener(new WIN());}
public static void main(String args[]){Datas d = new Datas();try{Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
conn = DriverManager.getConnection("jdbc:odbc:custo"); // custo is the DSN Namestat = conn.createStatement();res = stat.executeQuery("Select * from Customers"); // Customers is the table nameres.next();}catch(Exception e){System.out.println("Error" +e);}d.showRecord(res);}
public void actionPerformed(ActionEvent e){if(e.getSource() == next){try{res.next();}catch(Exception ee) {}showRecord(res);}
}public void showRecord(ResultSet res){try{id.setText(res.getString(1));name.setText(res.getString(2));}catch(Exception e) {}}class WIN extends WindowAdapter
{public void windowClosing(WindowEvent w)
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{JOptionPane jop = new JOptionPane();
jop.showMessageDialog(null,"Database","Thanks",JOptionPane.QUESTION_MESSAGE);}} //end of WIN class}//end of Datas class
OUTPUT:
D:\ Java\jdk1.5.0_03\bin>javac Datas.javaD:\ Java\jdk1.5.0_03\bin>java Datas
CONCURRENT PROGRAMMING:
import java.sql.*;
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import java.sql.DriverManager.*;class Ja{String bookid,bookname;int booksno;Connection con;Statement stmt;ResultSet rs;Ja(){try{Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");con=DriverManager.getConnection("jdbc:odbc:cust");}catch(Exception e){
System.out.println("connection error");}}void myput(){try{stmt=con.createStatement();rs=stmt.executeQuery("SELECT * FROM cust1");while(rs.next()){
booksno=rs.getInt(1);bookid=rs.getString(2);bookname=rs.getString(3);System.out.println("\n"+ booksno+"\t"+bookid+"\t"+bookname);}rs.close();stmt.close();con.close();}catch(SQLException e){
System.out.println("sql error");}}}
class prog1{
public static void main(String arg[]){Ja j=new Ja();
j.myput();
}}
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OUTPUT:
D:\ Java\jdk1.5.0_03\bin>javac Ja.javaD:\ Java\jdk1.5.0_03\bin>java prog1
1 10 JAVA
2 20 C++
3 30 C#
RESULT:
Thus the program Implementation of simple OPAC system for library has beenSuccessfully executed and verified successfully
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while(true){try{Socket socket=server.accept();System.out.println("Socket:"+socket);new ClientThread(socket).start();}catch(IOException e){e.printStackTrace();}}}
public static void main(String[]args){new SimpleThreadedSocketListener().listen();
}class ClientThread extends Thread{Socket socket;
public ClientThread(Socket socket){this.socket=socket;}
public void run(){InputStream in;
try{in=socket.getInputStream();int byteRead;while((byteRead=in.read())!=-1){System.out.print((char)byteRead);}}catch(IOException e){
e.printStackTrace();}}}}//CLIENT
import java .io.*;import java .awt.*;import java .awt.event.*;import java .net.*;import javax.swing.*;
public class SimpleClient extends JFrame implements ActionListener{
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Socket client=null;String serverAddr="localhost";int serverPort=8888;PrintWriter out;JTextField tf;
public SimpleClient(){Try{client=new Socket(serverAddr,serverPort);System.out.println("Client:"+client);out=new PrintWriter(client.getOutputStream());out.println("HELLOW");out.flush();}catch(UnknownHostException e){
e.printStackTrace();}catch(IOException e){e.printStackTrace();}Container cp=this.getContentPane();cp.setLayout(new FlowLayout(FlowLayout.LEFT,15,15));cp.add(new JLabel("Enter your message or\"quit\""));tf=new JTextField(40);tf.addActionListener(this);
cp.add(tf);this.setDefaultCloseOperation(EXIT_ON_CLOSE);this.pack();this.setTitle("simple Client");this.setVisible(true);}
public void actionPerformed(ActionEvent e){String message=tf.getText();System.out.println(message);if(message.equals("quit"))
{try{out.close();client.close();System.exit(0);}catch(IOException e1){e1.printStackTrace();}
}else
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{out.println(message);out.flush();tf.setText("");}}
public static void main(String[] args){new SimpleClient();}}
OUTPUT:
C:\jdk1.6.0_17\bin>javac SimpleClient.javaC:\jdk1.6.0_17\bin>java SimpleClient
Client:Socket[addr=localhost/127.0.0.1,port=8888,localport=1040]
C:\jdk1.6.0_17\bin>javac SimpleThreadedSocketListener.javaC:\jdk1.6.0_17\bin>java SimpleThreadedSocketListener
ServerSocket:ServerSocket[addr=0.0.0.0/0.0.0.0,port=0,localport=8888]Socket:Socket[addr=/127.0.0.1,port=1040,localport=8888]
HELLOWrajaramurajeshramki
C:\jdk1.6.0_17\bin>
RESULT:
Thus the program Implementation of multi threaded echo server has been successfully
executed verified and successfully