CS2309 Java Lab Manual CSE

EX. NO: Rational number class in Java

DATE :

AIM:

ALGORITHM:

public static void main(String a[]) { Scanner s=new Scanner(System.in); System.out.println("Enter the Numerator Value:"); int c=s.nextInt(); System.out.println("\n Enter the Denominator Value:"); int b=s.nextInt(); Rational r=new Rational(c,b); r.reducedform(); r.display(); } }

OUTPUT: H:\CS2309>java Rational Enter the Numerator Value: 500 Enter the Denominator Value: 1000 Numerator Value: 500 Denominator Value: 1000 Before Simplification: 500/1000 Reduced Form= 1/2 H:\CS2309>java Rational Enter the Numerator Value: 100 Enter the Denominator Value: 0 Numerator Value: 100 Denominator Value: 0 Before Simplification: 100/0 In determinant Form

RESULT:

EX. NO : Date class in Java

DATE :

AIM:

ALGORITHM:

PROGRAM: /** Date class in java */ import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; public class BasicDate { public static void main (String a[ ]) throws Exception { Date today=Calendar.getInstance( ).getTime( ); DateFormat shortf = SimpleDateFormat.getDateInstance(SimpleDateFormat.SHORT); DateFormat longf =SimpleDateFormat.getDateInstance(SimpleDateFormat.LONG); DateFormat medf = SimpleDateFormat.getDateInstance(SimpleDateFormat.MEDIUM); System.out.println(shortf.format(today)); System.out.println(longf.format(today)); System.out.println(mediumf.format(today)); String DateAsText=shortf.format(today); Date TextAsDate=shortf.parse(DateAsText); System.out.println(today); } }

OUTPUT:

H:\CS2309>java BasicDate 3/9/12 3 September, 2012 3 Sep, 2012 Mon Sep 03 21:48:24 IST 2012 RESULT:

EX. NO : Lisp-like list in Java

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AIM:

ALGORITHM:

PROGRAM:

/** Lisp-like List */ import java.util.*; public class Lisp { public int car(List l) { Object ob=l.get(0); String st=ob.toString(); System.out.println("Using a L.car( ) function\n"); return Integer.parseInt(st); } public List cons(List l) { Object ob=l.add(7); Object obj[ ]=l.toArray(); System.out.println("Using a L.cons( ) function\n"); List list=Arrays.asList(obj); return list; } public List cdr(List l) { Object ob=l.remove(0); Object obj[ ]=l.toArray( ); System.out.println("Using a L.cdr( ) function \n"); List list=Arrays.asList(obj); return list; } public static void main(String a[]) { Listl=new ArrayList( ); l.add(3); l.add(0); l.add(2); l.add(5); Lisp b=new Lisp(); int val=b.car(l); System.out.println(""+val+"\n"); List list1=b.cons(l); System.out.println(""+list1+"\n"); List list=b.cdr(l); System.out.println(list); } }

OUTPUT: H:\CS2309>java Lisp Using a L.car( ) function 3 Using a L.cons( ) function [3, 0, 2, 5, 7] Using a L.cdr( ) function [0, 2, 5, 7]

RESULT:

EX. NO : Design a Java interface for ADT Stack

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AIM:

ALGORITHM:

PROGRAM: import java.util.*; import java.lang.*; interface StackDemo { public void push(int v); public void pop(); } class Link implements StackDemo { LinkedList list=new LinkedList(); public void push(int v) { list.addFirst(v); System.out.println(list); } public void pop() { list.removeFirst(); System.out.println(list); } } class Link1 implements StackDemo { static int n=0; ArrayList list=new ArrayList(); public void push(int v) { list.add(v); n++; System.out.println(list); } public void pop() { list.remove(--n); System.out.println(list); } } class StackAll { public static void main(String args[]) { int ch,lk,ak; System.out.println("Stack Implementation Using Array and Linked List"); System.out.println("Enter your choice"); System.out.println("1.Stack Implementation Using Linked List"); System.out .println("2.Stack Implementation Using Array"); Scanner s=new Scanner(System.in); ch=s.nextInt();

default:System.out.println("Invalid choice"); break; } } while(akjava StackAll Stack Implementation Using Array and Linked List Enter your choice 1.Stack Implementation Using Linked List 2.Stack Implementation Using Array 1 1.Stack Implementation Using Linked List Enter your choice 1.Push 2.Pop 1 Enter elements 12 [12] Enter your choice 1.Push 2.Pop 1 Enter elements 14 [14, 12] Enter your choice 1.Push 2.Pop 1 Enter elements 25 [25, 14, 12] Enter your choice 1.Push 2.Pop 2 [14, 12] Link@10b30a7 Enter your choice 1.Push 2.Pop 2 [12] Link@10b30a7 Enter your choice 1.Push 2.Pop 2 [] Link@10b30a7 Enter your choice 1.Push 2.Pop 2 Empty Stack:java.util.NoSuchElementException Enter your choice 1.Push 2.Pop 3 Invalid choice

1.Stack Implementation Using Array Enter your choice 1.Push 2.Pop 1 Enter elements 51 [51] Enter your choice 1.Push 2.Pop 1 Enter elements 52 [51, 52] Enter your choice 1.Push 2.Pop 1 Enter elements 53 [51, 52, 53] Enter your choice 1.Push 2.Pop 2 [51, 52] Enter your choice 1.Push 2.Pop 2 [51] Enter your choice 1.Push 2.Pop 2 [] Enter your choice 1.Push 2.Pop 2 Empty stack java.lang.ArrayIndexOutOfBoundsException: -1 Enter your choice 1.Push 2.Pop 3 Invalid choice Invaild choice

RESULT:

EX. NO: Vehicle class hierarchy design in Java

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AIM:

ALGORITHM:

PROGRAM: import java.io.*; class Vehicle { String regno; int model; Vehicle(String r, int m) { regno=r; model=m; } void display() { System.out.println("Registration no: "+regno); System.out.println("Model no: "+model); } } class Twowheeler extends Vehicle { int noofwheel; Twowheeler(String r,int m,int n) { super(r,m); noofwheel=n; } void display() { System.out.println("Two wheeler Tvs"); super.display(); System.out.println("No. of Wheels: " +noofwheel); } } class Threewheeler extends Vehicle { int noofleaf; Threewheeler(String r,int m,int n) { super(r,m); noofleaf=n; } void display() { System.out.println("Three wheeler Auto"); super.display(); System.out.println("No. of Wheels:" +noofleaf); } } class Fourwheeler extends Vehicle { int noofleaf; Fourwheeler(String r,int m,int n) { super(r,m); noofleaf=n; }

void display() { System.out.println("Four wheeler Car"); super.display(); System.out.println("No. of Wheels:" +noofleaf); } } public class Vehicledemo { public static void main(String arg[]) { Twowheeler t1; Threewheeler th1; Fourwheeler f1; t1=new Twowheeler("TN74 12345", 1,2); th1=new Threewheeler("TN74 54321", 4,3); f1=new Fourwheeler("TN34 45677",5,4); t1.display(); th1.display(); f1.display(); } } OUTPUT: H:\CS2309>java Vehicledemo Two wheeler Tvs Registration no: TN74 12345 Model no: 1 No. of Wheels: 2 Three wheeler Auto Registration no: TN74 54321 Model no: 4 No. of Wheels:3 Four wheeler Car Registration no: TN34 45677 Model no: 5 No. of Wheels:4

RESULT:

EX. NO: Random Generation of objects

DATE:

AIM:

ALGORITHM:

public Double getValue() { return this.money; } public String getPrintableValue() { String str="Objectname::Rupee\nINR::RS"+getValue()+"\n------\n"; return str; } } class Dollar extends Currency { public Dollar(Double amount) { super(amount); } public Double getValue() { return(this.money*D_R_E); } public String getPrintableValue() { String str="Objectname::Dollar\nUSD::$"+this.money+"\nINR::Rs"+getValue()+"\n---\n"; return str; } }

/* ReadCurrency.java */ import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.ObjectInputStream; public class ReadCurrency { public static void main(String args[])throws IOException, ClassNotFoundException { Currency currency=null; ObjectInputStream in; in =new ObjectInputStream(new FileInputStream(new File("currency.txt"))); while((currency=(Currency)in.readObject())!=null) { System.out.println(currency.getPrintableValue()); } in.close(); } }

OUTPUT: H:\CS2309>javac StoreCurrency.java H:\CS2309>java StoreCurrency H:\CS2309>javac ReadCurrency.java H:\CS2309>java ReadCurrency Objectname::Rupee INR::RS3.539596175905678 ------ Objectname::Rupee INR::RS7.23774299663749 ------ Objectname::Rupee INR::RS5.628136075750075 ------ Objectname::Dollar USD::$7.113509356001621 INR::Rs316.15992332749204 ------ Objectname::Dollar USD::$8.277365791228362 INR::Rs367.88752259114455 ------ Objectname::Dollar USD::$9.676135168723924 INR::Rs430.05582757393483 ------ Objectname::Rupee INR::RS7.52459928209551 ------ Objectname::Rupee INR::RS5.344043955456231 ------ Objectname::Rupee INR::RS6.022195153063526 ------ Objectname::Rupee INR::RS9.281613788590379 ------

RESULT:

EX. NO: Scientific Calculator in Java DATE : AIM:

ALGORITHM:

PROGRAM: import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.event.*; import java.lang.*; public class Scicalc { public static void main(String [] a) { CalculatorFrame frame=new CalculatorFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setVisible(true); } } class CalculatorFrame extends JFrame { public CalculatorFrame() { setTitle("CALCULATOR"); CalculatorPanel pan=new CalculatorPanel(); add(pan); 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); addButton("4",insert); addButton("5",insert); addButton("6",insert);

addButton("+",command); addButton("ME",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!",insert); 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 l) { JButton button=new JButton(label); button.addActionListener(l); 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")) { Double m=(1/Double.parseDouble(display.getText())); display.setText(" " +m); } else if(input.equals("sqrt")) display.setText(" "+Math.sqrt(Double.parseDouble(display.getText()))); else if(input.equals("log")) display.setText(" "+Math.log(Double.parseDouble(display.getText())));

else if(input.equals("x2")) display.setText(""+Double.parseDouble(display.getText())*Double.parseDouble (display.getText()));

else if(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)); } else if(input.equals("tan")) { double angle=Double.parseDouble(display.getText())*2.0*Math.PI/360.0; display.setText(" " +Math.tan(angle)); } else if(input.equals("n!")) { double nValue=1.0; for(double i=1.0;i

OUTPUT: H:\CS2309> java Scicalc

RESULT:

EX. NO: Multithreading in Java DATE : AIM:

ALGORITHM:

PROGRAM:

interface maxlimit { public static final int MAX_LIMIT=10000; } class prime extends Thread implements maxlimit { int num[ ]=new int[MAX_LIMIT]; prime(String n) { super(n); for(int i=0;i

OUTPUT: H:\CS2309>java primefibo Prime numbers in fibonacci series 2 3 5 13 89 233 RESULT: