Java Practical Slip Solutions

Slip no 1

Write a java program to read the characters from a file, if a character is alphabet then reverse its case, if not then display its category on the Screen. (Whether it is Digit or Space)

import java.io.*;

class Slip1

{

public static void main(String args[])throws Exception

{

BufferedReaderbr=new BufferedReader(new InputStreamReader(System.in));

System.out.println("Enter file Name");

String f1=br.readLine();

FileReaderfr=new FileReader(f1);

intch;

while((ch=fr.read())!=-1)

{

char c=(char)ch;

if(Character.isUpperCase(c))

{

c=Character.toLowerCase(c);

System.out.print(c);

}

else if(Character.isLowerCase(c))

{

c=Character.toUpperCase(c);

System.out.print(c);

}

else if(Character.isDigit(c))

{

System.out.print(c+"Digit");

}

else if(Character.isSpaceChar(c))

System.out.print(c+"Space");

else

System.out.print(c);

}

fr.close();

}

Output:

Enter file Name

testslip1.txt

mYSpacenAMESpaceISSpaceaPARNA

rOLLSpaceNO: Space2Digit0Digit1Digit1Digit

Slip no 2

Write a java program to accept n names of cites from user and display them in descending order.

class Slip2

{

public static void main(String args[])

{

int n=args.length;

inti,j;

String str[]=new String[n];

for(i=0;i<n;i++)

{

str[i]=args[i];

}

for(i=0;i<n;i++)

{

for(j=i+1;j<n;j++)

{

if((str[i].compareTo(str[j]))>0)

{

String tmp=str[j];

str[j]=str[i];

str[i]=tmp;

}

System.out.println("City Name After Sorting");

for(i=0;i<n;i++)

{

System.out.println(str[i]);

}

Output:

Pune Bhosari Mumbai Chakan Nashik Thane Ahemadnagar

City Name After Sorting

Ahemadnagar

Bhosari

Chakan

Mumbai

Nashik

Pune

Thane

Slip no 5

Define a class Student with attributes rollno and name. Define default and parameterized constructor. Override the toString() method. Keep the count of Objects created.

Create objects using parameterized constructor and Display the object count after each object is created

importjava.util.*;

class Slip5

{

staticintcnt;

int roll;

String nm;

Slip5()

{

}

Slip5(intrno,String name)

{

roll=rno;

nm=name;

cnt++;

System.out.println("Objects created="+cnt);

}

public String toString()

{

return "rno="+roll+" name of student="+nm;

}

public static void main(String a[])

{

intn,i,rno;

String name;

System.out.println("Enter no of students");

Scanner s=new Scanner(System.in);

n=s.nextInt();

Slip5 ob[]=new Slip5[n];

for(i=0;i<n;i++)

{

System.out.println("Enter roll no");

rno=s.nextInt();

System.out.println("Enter name");

name=s.next();

ob[i]=new Slip5(rno,name);

}

System.out.println("Students are: ");

for(i=0;i<n;i++)

{

System.out.println(ob[i]);

}

Output:

Enter no of students

Enter roll no

Enter name

Geetanjali Gautam

Objects created=1

Enter roll no

Enter name

Aparna Joshi

Objects created=2

Enter roll no

Enter name

Rohini Kulkarni

Objects created=3

Students are:

rno=11 name of student=Geetanjali

rno=12 name of student=Aparna Joshi

rno=13 name of student=Rohini Kulkarni

Slip no 9

Write a java program to display the contents of a file in reverse order.

import java.io.*;

class Slip9

{

public static void main(String a[]) throws Exception

{

BufferedReaderbr = new BufferedReader(new InputStreamReader(System.in));

System.out.println("Enter file name");

String fname=br.readLine();

FileInputStream fin = new FileInputStream(fname);

BufferedInputStreambis = new BufferedInputStream(fin);

int s = bis.available();

System.out.println(s);

for(inti=s-1;i>=0;i--)

{ bis.mark(i);

bis.skip(i);

System.out.print((char)bis.read());

bis.reset();

}

fin.close();

}

Output

Enter file name

slip7.java

563

}

;)(7pilS wen

{

)][sgragnirtS(niamdiovcitatscilbup

}

;)eurt(elbisiVtes

;))(tuoyaLwolF wen(tuoyaLtes

;)004,004(eziStes

;)EULB.roloC(dnuorgkcaBtes

;)l(dda

;)DER.roloC(dnuorgeroFtes.l

;))42,DLOB.tnoF,"aigroeG"(tnoF wen(tnoFtes.l

;)"avajolleH"(lebaL wen=l

{

)(7pilS

;llebaL

{

emarFsdnetxe 7pilS ssalc

;*.twa.avajtropmi

.emarFeht no eulB ?rolocdnuorgkcab ,

,aigroeG -tnoFsgnitteshtiw ?avaJolleH? yalps

nemngissA

.ijanaTinihoRtuaR:emaN */

Slip no 11

Write a java program to accept Employee name from the user and check whether it is valid or not.

If it is not valid then throw user defined Exception “Name is Invalid” otherwise display it.(Name should contain only characters)

import java.lang.Exception;

class MyException extends Exception

{

MyException(String message)

{

super(message);

}

class Slipno11

{

public static void main(String args[])

{

String myName;

System.out.println(validateFirstName("Aparna"));

System.out.println(validateMiddleName("123"));

System.out.println(validateLastName("Lohakare"));

}

public static boolean validateFirstName(String firstname)

{

return firstname.matches("[A-Z][a-z]*");

}

public static boolean validateMiddleName(String middlename)

{

return middlename.matches("[A-Z][a-z]*");

}

public static boolean validateLastName(String lastname)

{

return lastname.matches("[A-Z][a-z]*");

}

Output:

C:\Aparna>java Slipno11

true

false

true

Slip no 15

Define an abstract class Shape with abstract method area() and volume().Write a java program to calculate area and volume of Cone and Cylinder.

abstract class Shape

{

float pi=3.14F;

abstract float areaofcone(float radius,float side);

abstract float volumeofcone(float radius,float height);

abstract float areaofcylinder(float radius,float height);

abstract float volumeofcylinder(float radius,float height);

}

class AreaVolume extends Shape

{

float areaofcone(float r,float s)

{

return pi*r*s;

}

float volumeofcone(float r,float h)

{

return (1/3)*pi*r*r*h;

}

float areaofcylinder(float r,float h)

{

return 2*pi*r*h;

}

float volumeofcylinder(float r,float h)

{

return pi*r*r*h;

}

class Slip15

{

public static void main(String args[])

{

Shape obj=new AreaVolume();

float x=obj.areaofcone(1.2F,3.2F);

System.out.println("Area of Cone="+x);

float y=obj.volumeofcone(1.2F,3.2F);

System.out.println("Volume of Cone="+y);

float z=obj.areaofcylinder(1.2F,3.2F);

System.out.println("area of cylinder="+z);

float p=obj.volumeofcylinder(1.2F,3.2F);

System.out.println("volume of cylinder="+p);

}

Output:

Area of Cone=12.057601

Volume of Cone=0.0

area of cylinder=24.115202

volume of cylinder=14.469123

Write a java program that displays the number of characters,lines &words from a file.

import java.io.*;

class Slip18

{

public static int words=0;

public static int lines=0;

public static int chars=0;

public static void wc(Reader r)throws IOException

{

StreamTokenizer tok=new StreamTokenizer(r);

tok.resetSyntax();

tok.wordChars(33,255);

tok.whitespaceChars(0,' ');

tok.eolIsSignificant(true);

while(tok.nextToken()!=tok.TT_EOF)

{

switch(tok.ttype)

{

case StreamTokenizer.TT_EOL:

lines++;

chars++;

break;

case StreamTokenizer.TT_WORD:

words++;

default:

chars+=tok.sval.length();

break;

}

public static void main(String args[])

{

if(args.length==0)

{

try

{

wc(new InputStreamReader(System.in));

System.out.println(lines+" "+words+" "+chars);

}catch(IOException e){ }

}

else

{

int twords=0,tchars=0,tlines=0;

for(int i=0;i<args.length;i++)

{

try

{

words=chars=lines=0;

wc(new FileReader(args[i]));

twords+=words;

tchars+=chars;

tlines+=lines;

System.out.println(args[i]+": "+lines+" "+words+" "+chars);

}catch(IOException e){

System.out.println(args[i]+": error.");

}

System.out.println("total: "+tlines+" "+twords+" "+tchars);

}

//Testslip18.txt

My name is Aparna Kulkarni

Roll no is 1234

collage name is Siddhant collage of management studies

Output:

Testslip18.txt: 3 16 76

total: 3 16 76

Slip no 22

Define an Interface Shape with abstract method area().Write a java program to calculate an area of circle and sphere.(Use final keyword).

interface Shape

{

final float pi=3.11416f;

public float areaOfCircle(float radius);

public float areaOfSphere(float radius);

}

class AreaOfCirSphere implements Shape

{

public float areaOfCircle(float r)

{

return pi*r*r;

}

public float areaOfSphere(float r)

{

return (4/3)*pi*r*r;

}

class Slip22{

public static void main(String args[])

{

Shape area;

AreaOfCirSphere ob=new AreaOfCirSphere();

area=ob;

float areaOfCir=area.areaOfCircle(5.3F);

System.out.println("Area of Circle="+areaOfCir);

float areaOfSphere=area.areaOfSphere(3.2F);

System.out.println("Area of Sphere="+areaOfSphere);

}

Output:

Area of Circle=87.47676

Area of Sphere=31.888998

Slip no 23

Write a java program to accept to details of n Players from user(Player code,name,runs,innings-played and number of times not out).The program should contain following menus:

-Display average runs of a single player.

-Display average runs of all players.(Use array of object,Method overloading and static keyword)

import java.util.*;

import java.io.*;

class player

{

String name;

int trun,tno,ip,pcode;

float avg;

static BufferedReader br=new BufferedReader(new InputStreamReader(System.in));

void getdata()

{

try

{

System.out.println("\nEnter Player Code: ");

pcode=Integer.parseInt(br.readLine());

System.out.println("Enter Player name: ");

name=br.readLine();

System.out.println("Enter Total Runs: ");

trun=Integer.parseInt(br.readLine());

System.out.println("Enter Times Not Out: ");

tno=Integer.parseInt(br.readLine());

System.out.println("Enter Innings Played: ");

ip=Integer.parseInt(br.readLine());

}

catch(Exception e)

{

System.out.println(e);

}

void putdata()

{

System.out.println(pcode + "\t" + name + "\t" + trun + "\t" + tno + "\t" + ip + "\t" + avg);

}

void getavg()

{

avg=trun/(ip-tno);

}

static void getavg(player p[],int n)

{

for(int i=0;i<n;i++)

{

p[i].avg=p[i].trun/(p[i].ip-p[i].tno);

p[i].putdata();

}

public class Slip23

{

static BufferedReader br=new BufferedReader(new InputStreamReader(System.in));

public static void main(String args[])

{

int n=0,ch;

player p[]=null;

try

{

System.out.println("\n\n1.Enter details of players. ");

System.out.println("2.Display average runs of a single player ");

System.out.println("3.Display average runs of all player ");

System.out.println("4.Exit ");

System.out.println("Enter your choice: ");

ch=Integer.parseInt(br.readLine());

switch(ch)

{

case 1 :

System.out.print("Enter No. of Players: ");

n=Integer.parseInt(br.readLine());

p=new player[n];

for(int i=0;i<n;i++)

{

p[i]=new player();

p[i].getdata();

}

break;

case 2:

System.out.println("Enter Player Code For Avg Calculation :");

int m=Integer.parseInt(br.readLine());

boolean flag=false;

for(int i=0;i<n;i++)

{

if(p[i].pcode==m)

{

flag=true;

p[i].getavg();

p[i].putdata();

}

if(!flag)

System.out.println("Player not found");

break;

case 3:

System.out.println("Average of All the Players");

player.getavg(p,n);

break;

case 4:

break;

default:

System.out.println("Wrong Input (Try again)");

}

}while(ch!=4);

}

catch(Exception e)

{

System.out.println(e);

}

Output:

1.Enter details of players.

2.Display average runs of a single player

3.Display average runs of all player

4.Exit

Enter your choice:

Enter No. of Players: 2

Enter Player Code:

101

Enter Player name:

Aparna

Enter Total Runs:

122

Enter Times Not Out:

Enter Innings Played:

Enter Player Code:

102

Enter Player name:

Geeta

Enter Total Runs:

100

Enter Times Not Out:

Enter Innings Played:

1.Enter details of players.

2.Display average runs of a single player

3.Display average runs of all player

4.Exit

Enter your choice:

Enter Player Code For Avg Calculation :

102

102 Geeta 100 3 1 -50.0

1.Enter details of players.

2.Display average runs of a single player

3.Display average runs of all player

4.Exit

Enter your choice:

Average of All the Players

101 Aparna 122 2 1 -122.0

102 Geeta 100 3 1 -50.0

1.Enter details of players.

2.Display average runs of a single player

3.Display average runs of all player

4.Exit

Enter your choice:

Slip no 25

Define an Employee class with suitable attributes having getSalary() method, which returns salary withdrawn by a particular employee. Write a class Manager which extends a class Employee, override the getSalary() method,which will return salary of manager by adding travelling allowance,house rent allowance etx.

import java.util.*;

import java.io.*;

class Emp

{

int e_no;

float bsal,gsal,tax ,pf,nsal,ded,da;

String e_name;

Emp(int n ,String en,float bs)

{

e_no=n;

e_name=en;

bsal=bs;

}

float getSalary()

{

da=bsal*0.10f;

gsal=bsal+da;

tax=bsal*0.05f;

pf=bsal*0.04f;

ded=tax+pf;

nsal=gsal-ded;

return(nsal);

}

void display()

{

System.out.println("EmpNo:" +e_no+"Name: "+e_name +"Net Salary:" +nsal);

}

class Manager extends Emp

{

float hra,ta,mns;

Manager(int n,String en,float bs,float hr,float t)

{

super(n,en,bs);

hra=hr;

ta=t;

}

float getSalary()

{

float r=super.getSalary();

mns=r+hra+ta;

return(mns);

}

class Slip25

{

public static void main(String args[])

{

Manager ma=new Manager(01,"Aparna Lohakare",40000.0f,9200.0f,8420.0f);

float shb=ma.getSalary();

ma.display();

System.out.println("Salary of manager is\t" +shb);

}

Output:

EmpNo:1Name: Aparna LohakareNet Salary:40400.0

Salary of manager is 58020.0

Slip no 26

Write a java Program to accept ‘n’ no’s through the command line and store all the prime no’s and perfect no’s

into the different arrays and display both the arrays.

import java.util.*;

import java.io.*;

class Slip26

{

public static void main(String args[])

{

int n=args.length;

int pri[]=new int[n];

int per[]=new int[n];

int k=0,i,j;

int sum=0;

//prime no

for(i=0;i<n;i++)

{

for(j=2;j<Integer.parseInt(args[i]);j++)

{

if(Integer.parseInt(args[i])%j==0)

break;

}

if(Integer.parseInt(args[i])==j)

{

pri[k++]=Integer.parseInt(args[i]);

}

System.out.println("Prime Array=");

for(j=0;j<k;j++)

{

System.out.print(" "+pri[j]);

}

//Perfect no

k=0;

for(i=0;i<n;i++)

{

sum=0;

for(j=1;j<Integer.parseInt(args[i]);j++)

{

if(Integer.parseInt(args[i])%j==0)

{

sum=sum+j;

}

if(sum==Integer.parseInt(args[i]))

{

per[k++]=sum;

}

System.out.println("\nPerfect Array=");

for(i=0;i<k;i++)

{

System.out.println(" "+per[i]);

}

Output:

C:\Aparna>javac Slip26.java

C:\Aparna>java Slip26 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

Prime Array=

2 3 5 7 11 13 17 19

Perfect Array=

Slip no 28

Write a java program to read n Students names from user,store them into the ArrayList collection.The program should not allow duplicate names.Display the names in Ascending order.

import java.util.*;

import java.io.*;

public class Slip28

{

public static void main(String args[])throws Exception

{

BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

ArrayList a = new ArrayList();

System.out.println("\nEnter number of Employee : ");

int n = Integer.parseInt(br.readLine());

System.out.println("\nEnter name : ");

for(int i = 1; i <= n; i++)

{

a.add(br.readLine());

}

TreeSet tr = new TreeSet(a);

System.out.println("Sorted Name are : "+tr);

}

Output:

Enter number of Employee :

Enter name :

renuka

pratiksha

madhuri

aparna

geeta

renuka

rohini

Sorted Name are : [aparna, geeta, madhuri, pratiksha, renuka, rohini]

Slip No 29

Write a java program to accept n employee names from user,store them into the linkedlist class and Display them by using.

-Iterator Interface

-ListIterator Interface

import java.util.*;

import java.io.*;

public class Slip29

{

public static void main(String args[])throws Exception

{

int n;

BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

LinkedList li = new LinkedList ();

System.out.println("\nEnter number of Employee : ");

n = Integer.parseInt(br.readLine());

System.out.println("\nEnter name : ");

for(int i = 1; i <= n; i++)

{

li.add(br.readLine());

}

System.out.println("\nLink List Content : ");

Iterator it = li.iterator();

while(it.hasNext())

{

System.out.println(it.next());

}

System.out.println("\nReverse order : ");

ListIterator lt = li.listIterator();

while(lt.hasNext())

{

lt.next();

}

while(lt.hasPrevious())

{

System.out.println(lt.previous());

}

Output:

Enter number of Employee

Enter name :

abc

pqr

Link List Content :

abc

pqr

Reverse order :

pqr

abc

Slip No 19

Write a java program to accept a number from the user, if number is zero then throw user defined Exception “Number is 0” otherwise calculate the sum of first and last digit of a given number (Use static keyword).

import java.io.*;

class NumberZero extends Exception

{

NumberZero()

{}

}

class Number

{

static int no;

Number() throws IOException

{

BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

System.out.println("Enter no");

no=Integer.parseInt(br.readLine());

try

{ if(no==0)

{

throw new NumberZero();

}

cal();

}//end of try

catch(NumberZero e)

{

System.out.println("no is zero");

}

void cal()

{ int l=0,r=0;

l = no%10;

//System.out.println("no = "+no);

if(no>9)

{

while(no>0)

{

r = no%10;

no=no/10;

}

System.out.println("Addition of first and last digit = "+(l+r));

}

else

System.out.println("Addition of first and last digit = "+l);

}

class Slip19

{

public static void main(String a[]) throws IOException

{ Number n= new Number();

}

Output

Enter no

Addition of first and last digit = 1

Enter no

Addition of first and last digit = 9

Enter no

456

Addition of first and last digit = 10

Slip no 4

Design a screen in Java to handle the Mouse Events such as MOUSE_MOVED and MOUSE_CLICK and display the position of the Mouse_Click in a TextField.

importjava.awt.*;

importjava.awt.event.*;

class Slip4 extends Frame

{

TextFieldstatusBar;

public static void main(String []args)

{

new Slip4().show();

}

Slip4()

{

addMouseListener(new MouseAdapter()

{

public void mouseClicked(MouseEvent e)

{

statusBar.setText("Clicked at (" + e.getX() + "," + e.getY() + ")");

repaint();

}

public void mouseEntered(MouseEvent e)

{

statusBar.setText("Entered at (" + e.getX() + "," + e.getY() + ")");

repaint();

}

);

addWindowListener(new WindowAdapter()

{

public void windowClosing(WindowEvent e)

{

System.exit(0);

}

});

setLayout(new FlowLayout());

setSize(275,300);

setTitle("Mouse Click Position");

statusBar = new TextField(20);

add(statusBar);

setVisible(true);

}

Slip no 6

.Create a calculator with functionality in an Applet.

importjava.awt.*;

importjava.applet.*;

importjava.awt.event.*;

//<applet code="Cal" width=500 height=500></applet>

public class Cal extends Applet implements ActionListener

{

inta,b,c;

TextField t1;

Button b1,b2,b3,b4,b5,b6,b7,b8,b9,b10,b11,b12,b13,b14,b15,b16;

String s,s1,s2,s3,s4;

public void init()

{

setLayout(null);

t1=new TextField(10);

t1.setBounds(80,200,260,40);

add(t1);

b1=new Button("0");

b2=new Button("1");

b3=new Button("2");

b4=new Button("3");

b5=new Button("4");

b6=new Button("5");

b7=new Button("6");

b8=new Button("7");

b9=new Button("8");

b10=new Button("9");

b11=new Button("+");

b12=new Button("-");

b13=new Button("*");

b14=new Button("/");

b15=new Button("=");

b16=new Button("CLR");

b1.setBounds(90,260,40,30);

add(b1);

b2.setBounds(140,260,40,30);

add(b2);

b3.setBounds(190,260,40,30);

add(b3);

b4.setBounds(240,260,40,30);

add(b4);

b5.setBounds(290,260,40,30);

add(b5);

b6.setBounds(90,300,40,30);

add(b6);

b7.setBounds(140,300,40,30);

add(b7);

b8.setBounds(190,300,40,30);

add(b8);

b9.setBounds(240,300,40,30);

add(b9);

b10.setBounds(290,300,40,30);

add(b10);

b11.setBounds(90,340,40,30);

add(b11);

b12.setBounds(140,340,40,30);

add(b12);

b13.setBounds(190,340,40,30);

add(b13);

b14.setBounds(240,340,40,30);

add(b14);

b15.setBounds(290,340,40,30);

add(b15);

b16.setBounds(90,380,70,20);

add(b16);

b1.addActionListener(this);

b2.addActionListener(this);

b3.addActionListener(this);

b4.addActionListener(this);

b5.addActionListener(this);

b6.addActionListener(this);

b7.addActionListener(this);

b8.addActionListener(this);

b9.addActionListener(this);

b10.addActionListener(this);

b11.addActionListener(this);

b12.addActionListener(this);

b13.addActionListener(this);

b14.addActionListener(this);

b15.addActionListener(this);

b16.addActionListener(this);

}

public void actionPerformed(ActionEvent ae)

{

repaint();

s=ae.getActionCommand();

if(s.equals("0")||s.equals("1")||s.equals("2")||s.equals("3")||s.equals("4")||s.equals("5")||s.equals("6")||s.equals("7")||s.equals("8")||s.equals("9"))

{

s1=t1.getText()+s;

t1.setText(s1);

}

if(s.equals("+"))

{

s2=t1.getText();

t1.setText("");

s3="+";

}

if(s.equals("-"))

{

s2=t1.getText();

t1.setText("");

s3="-";

}

if(s.equals("*"))

{

s2=t1.getText();

t1.setText("");

s3="*";

}

if(s.equals("/"))

{

s2=t1.getText();

t1.setText("");

s3="/";

}

if(s.equals("="))

{

s4=t1.getText();

a=Integer.parseInt(s2);

b=Integer.parseInt(s4);

if(s3.equals("+"))

c=a+b;

if(s3.equals("-"))

c=a-b;

if(s3.equals("*"))

c=a*b;

if(s3.equals("/"))

c=a/b;

t1.setText(String.valueOf(c));

}

if(s.equals("CLR"))

{

t1.setText("");

}

public void paint(Graphics g)

{

setBackground(Color.green);

g.drawRect(80,200,260,200);

showStatus("ASHUSOFTECH");

g.drawString("CALCULATER",200,50);

}

Slip no 7

Write a java program to display “Hello Java” with settings Font- Georgia, Foreground color- Red, background color – Blue on the Frame.

importjava.awt.*;

class Slip7 extends Frame

{

Label l1;

Slip7()

{

l1=new Label("Hello java");

l1.setFont(new Font("Georgia",Font.BOLD,24));

l1.setForeground(Color.RED);

add(l1);

setBackground(Color.BLUE);

setSize(300,300);

setLayout(new FlowLayout());

setVisible(true);

}

public static void main(String a[])

{

new Slip7();

}

Slip no 8

Write a java program to design a following GUI (Use Swing).

importjava.awt.*;

importjavax.swing.*;

class Slip8 extends JFrame

{

JLabel l1,l2,l3,l4,l5,l6;

JTextField t1,t2,t3;

JTextArea t;

JPanel p,p1,p2,p3;

ButtonGroupbg;

JRadioButtonm,f;

JCheckBox c1,c2,c3;

JButton b1,b2;

Slip8()

{

p =new JPanel();

p1=new JPanel();

l1=new JLabel("First Name ");

l2=new JLabel("last Name ");

l3=new JLabel("Address ");

l4=new JLabel("mobile No ");

t1=new JTextField(10);

t2=new JTextField(10);

t3=new JTextField(10);

t=new JTextArea(2,10);

p.add(l1); p.add(t1);

p.add(l2); p.add(t2);

p.add(l3); p.add(t);

p.add(l4); p.add(t3);

p.setLayout(new GridLayout(4,2));

add(p);

l5=new JLabel("Gender ");

m = new JRadioButton("male");

f = new JRadioButton("female");

bg = new ButtonGroup();

bg.add(m);

bg.add(f);

p1.add(l5);

p1.add(m);

p1.add(f);

p1.setLayout(new GridLayout(1,3));

p2=new JPanel();

l6=new JLabel("Your Interests ");

c1=new JCheckBox("Computer");

c2=new JCheckBox("Sports");

c3=new JCheckBox("Music");

p2.add(l6);

p2.add(c1);

p2.add(c2);

p2.add(c3);

p2.setLayout(new GridLayout(1,4));

p3=new JPanel();

b1=new JButton("submit");

b2=new JButton("clear");

p3.add(b1);

p3.add(b2);

add(p);

add(p1);

add(p2);

add(p3);

setSize(300,400);

setLayout(new FlowLayout(FlowLayout.LEFT));

setVisible(true);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

public static void main(String a[])

{

new Slip8();

}

Slip no 10

Write an applet application in Java for designing Temple.

importjava.awt.*;

importjava.applet.*;

public class Slip10 extends Applet

{

public void paint(Graphics g)

{

g.drawRect(400,100,30,30);

g.drawLine(400,100,400,180 );

g.drawLine(400,180,480,250);

g.drawLine(400,180,320,250);

g.drawRect(320,250,160,160);

g.drawRect(390,350,20,60);

}

//Slip10.html

<html>

</head>

<body>

<Applet code="Slip10.class"

width=150

height=500>

</Applet>

</body>

</html>

Slip no 14

Write a java program which will create a frame if we try to close it, it should change it’s color and it remains visible on the screen(Use swing).

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

class Slip14 extends JFrame

{

JPanel p = new JPanel();

Slip14()

{ setVisible(true);

setSize(400,400);

setTitle("Swing Background");

add(p);

addWindowListener(new WindowAdapter()

{

public void windowClosing(WindowEvent e)

{ p.setBackground(Color.RED);

JOptionPane.showMessageDialog(null,"Close window","Login",JOptionPane.INFORMATION_MESSAGE);

}

});

}

public static void main(String args[])

{

new Slip14();

Slip no 30

Write an applet in Java for smile face

import java.awt.*;

import java.applet.*;

public class AFace extends Applet

{

public void paint(Graphics g)

{

Font f=new Font("Helvetice", Font.BOLD,20);

g.setFont(f);

g.drawString("Keep Smiling!!!", 50, 30);

g.drawOval(60,60,210,200);

g.drawOval(80,115,70,30);

g.drawOval(180,115,70,30);

g.fillOval(90,120,50,20);

g.fillOval(190,120,50,20);

g.drawLine(165,125,165,175);

g.drawArc(110,130,110,95,0,-180);

g.drawOval(50,120,10,50);

g.drawOval(270,120,10,50);

}

//Slip30.html

<html>

</head>

<body>

<Applet code="AFace.class"

width=150

height=500>

</Applet>

</body>

</html>

Slip no 21

Write a Java program to design a screen using Swing that will create four TextFields. First for the text, second for what to find and third for replace. Display result in the fourth TextField. Display the count of total no. of replacements made. The button clear to clear the TextFields

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

public class Slip21 extends JFrame implements ActionListener

{

JLabel ltext, lfind, lreplace, loccurance;

JTextArea text;

JTextField findText, replaceText, occurrenceText;

JButton find, replace, clear;

JPanel pan1,pan2;

int occurrences=0,i=0;

Slip21()

{

ltext= new JLabel("Enter Text : ");

lfind = new JLabel("Text to Find : ");

lreplace = new JLabel("Text to Replace : ");

loccurance = new JLabel("No.of Occurrences : ");

text = new JTextArea(1,20);

findText = new JTextField(20);

replaceText = new JTextField(20);

occurrenceText = new JTextField(20);

pan1 = new JPanel();

pan1.setLayout(new GridLayout(4,2));

pan1.add(ltext);

pan1.add(text);

pan1.add(lfind);

pan1.add(findText);

pan1.add(lreplace);

pan1.add(replaceText);

pan1.add(loccurance);

pan1.add(occurrenceText);

find = new JButton("Find");

replace = new JButton("Replace");

clear= new JButton("Clear");

find.addActionListener(this);

replace.addActionListener(this);

clear.addActionListener(this);

pan2 = new JPanel();

pan2.setLayout(new FlowLayout());

pan2.add(find);

pan2.add(replace);

pan2.add(clear);

add(pan1,"Center");

add(pan2,"South");

setTitle("Find And Replace");

setSize(300, 200);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

setVisible(true);

}

public void actionPerformed(ActionEvent ae)

{

if(ae.getSource() == find)

{

String s = text.getText();

String f = findText.getText();

i = s.indexOf(f);

if(i != -1)

{ occurrences++;

occurrenceText.setText(Integer.toString(occurrences));

text.select(i,i+f.length());

text.requestFocus();

}

if(ae.getSource() == replace)

{

if(text.getSelectedText().length()!=0)

{

String r = replaceText.getText();

text.replaceSelection(r);

}

if(ae.getSource() == clear)

{

text.setText("");

findText.setText("");

replaceText.setText("");

occurrenceText.setText("");

}

public static void main(String[] args)

{

new Slip21();

}

Slip no 17

Write a Java program to design a screen using Awt that will take a user name and password. If the user name and password are not same, raise an Exception with appropriate message. User can have 3 login chances only. Use clear button to clear the TextFields.

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

class InvalidPasswordException extends Exception

{}

class Slip17 extends JFrame implements ActionListener

{

JLabel name, pass;

JTextField nameText;

JPasswordField passText;

JButton login, end;

static int cnt=0;

Slip17()

{

name = new JLabel("Name : ");

pass = new JLabel("Password : ");

nameText = new JTextField(20);

passText = new JPasswordField(20);

end = new JButton("End");

end.addActionListener(this);

setLayout(new GridLayout(3,2));

add(name);

add(nameText);

add(pass);

add(passText);

add(login);

add(end);

setTitle("Login Check");

setSize(300,300);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

setVisible(true);

}

public void actionPerformed(ActionEvent e)

{

if(e.getSource()==end)

{

System.exit(0);

}

if(e.getSource()==login)

{

try

{

String user = nameText.getText();

String pass = new String(passText.getPassword());

if(user.compareTo(pass)==0)

{ JOptionPane.showMessageDialog(null,"Login Successful","Login",JOptionPane.INFORMATION_MESSAGE);

System.exit(0);

}

else

{

throw new InvalidPasswordException();

}

catch(Exception e1)

{

cnt++;

JOptionPane.showMessageDialog(null,"Login Failed","Login",JOptionPane.ERROR_MESSAGE);

nameText.setText("");

passText.setText("");

nameText.requestFocus();

if(cnt == 3)

{

JOptionPane.showMessageDialog(null,"3 Attempts Over","Login",JOptionPane.ERROR_MESSAGE);

System.exit(0);

}

public static void main(String args[])

{

new Slip17();

}

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