BCA504P
– JAVA Programming Lab Manual
1.
Write a program to find factorial of list of number reading
input as command line argument.
Source Code
public
class Factorial
{
public static void main(String args[])
{
int[] arr = new int[10];
int fact;
if(args.length==0)
{
System.out.println("No
Command line arguments");
return;
}
for (int i=0; i<args.length;i++)
{
arr[i]=Integer.parseInt(args[i]);
}
for(int i=0;i<args.length;i++)
{
fact=1;
while(arr[i]>0)
{
fact=fact*arr[i];
arr[i]--;
}
System.out.println("Factorial of
"+ args[i]+"is : "+fact);
}
}
}
2. Write a program to display all prime
numbers between two limits.
Source Code
class
Prime
{
public static void main(String args[])
{
int i,j;
if(args.length<2)
{
System.out.println("No command
line Argruments ");
return;
}
int num1=Integer.parseInt(args[0]);
int num2=Integer.parseInt(args[1]);
System.out.println("Prime number between"+num1+"and"
+num2+" are:");
for(i=num1;i<=num2;i++)
{
for(j=2;j<i;j++)
{
int n=i%j;
if(n==0)
{
break;
}
}
if(i==j)
{
System.out.println("
"+i);
}
}
}
}
3. Write a program to sort list of elements in
ascending and descending order and show the exception handling.
Source Code
class
Sorting
{
public static void main(String args[])
{
int a[] = new int[5];
try
{
for(int i=0;i<5;i++)
a[i]=Integer.parseInt(args[i]);
System.out.println("Before
Sorting\n");
for(int i=0;i<5;i++)
System.out.println(" "
+ a[i]);
bubbleSort(a,5);
System.out.println("\n\n After
Sorting\n");
System.out.println("\n\nAscending order \n");
for(int i=0;i<5;i++)
System.out.print("
"+a[i]);
System.out.println("\n\nDescending order \n");
for(int i=4;i>=0;i--)
System.out.print("
"+a[i]);
}
catch(NumberFormatException e)
{
System.out.println("Enter only
integers");
}
catch(ArrayIndexOutOfBoundsException e)
{
System.out.println("Enter only
5 integers");
}
}
private static void bubbleSort(int [] arr,
int length)
{
int temp,i,j;
for(i=0;i<length-1;i++)
{
for(j=0;j<length-1-i;j++)
{
if(arr[j]>arr[j+1])
{
temp=arr[j];
arr[j]=arr[j+1];
arr[j+1]=temp;
}
}
}
}
}
4.
Write a program to implement Rhombus pattern reading the limit
form user.
Source code
import
java.io.*;
public
class RhombusPattern
{
public static void main(String args[])
throws IOException
{
int i,j,limit;
BufferedReader
br = new BufferedReader(new InputStreamReader(System.in));
System.out.println("Enter the
limit");
limit=Integer.parseInt(br.readLine());
for(i=1;i<=limit;i++)
{
for(j=limit-i;j>0;j--)
System.out.print("
");
for(j=1;j<=2*i-1;j++)
System.out.print("*");
System.out.println();
}
for(i=limit-1;i>=1;i--)
{
for(j=1;j<=limit-i;j++)
System.out.print("
");
for(j=1;j<=2*i-1;j++)
System.out.print("*");
System.out.println();
}
}
}
5. Write a program to implement all string
operations.
Source code
class
StringOperation
{
public static void main(String args[])
{
String s1="Hello";
String s2="World";
System.out.println("The strings are
"+s1+"and"+s2);
int len1=s1.length();
int len2=s2.length();
System.out.println("The length of
"+s1+" is :"+len1);
System.out.println("The length of
"+s2+" is :"+len2);
System.out.println("The
concatenation of two strings = "+s1.concat(s2));
System.out.println("First character
of "+s1+"is="+s1.charAt(0));
System.out.println("The uppercase of
"+s1+"is="+s1.toUpperCase());
System.out.println("The lower case
of "+s2+"is="+s2.toLowerCase());
System.out.println(" the letter e
occurs at position"+s1.indexOf("e")+"in"+s1);
System.out.println("Substring of
"+s1+"starting from index 2 and ending at 4 is =
"+s1.substring(2,4));
System.out.println("Replacing 'e'
with 'o' in "+s1+"is ="+s1.replace('e','o'));
boolean check = s1.equals(s2);
if(check==false)
System.out.println(""+s1+" and "+s2+" are not
same");
else
System.out.println("" +
s1+" and " + s2+"are same");
}
}
6. Write a program to find area of geometrical
figures using method.
Source code:
import
java.io.*;
class
Area
{
public static double circleArea(double r)
{
return Math.PI*r*r;
}
public static double squareArea(double side)
{
return side*side;
}
public static double rectArea(double width,
double height)
{
return width*height;
}
public static double triArea(double base,
double height1)
{
return 0.5*base*height1;
}
public static String readLine()
{
String input=" ";
BufferedReader in=new BufferedReader(new
InputStreamReader(System.in));
try
{
input = in.readLine();
}catch(Exception e)
{
System.out.println("Error" +
e);
}
return input;
}
public static void main(String args[])
{
System.out.println("Enter the
radius");
Double
radius=Double.parseDouble(readLine());
System.out.println("Area of circle =
" + circleArea(radius));
System.out.println("Enter the
side");
Double
side=Double.parseDouble(readLine());
System.out.println("Area of square =
"+squareArea(side));
System.out.println("Enter the
Width");
Double
width=Double.parseDouble(readLine());
System.out.println("Enter the
height");
Double
height=Double.parseDouble(readLine());
System.out.println("Area of
Rectangle = " + rectArea(width,height));
System.out.println("Enter the
Base");
Double
base=Double.parseDouble(readLine());
System.out.println("Enter the
Height");
Double
height1=Double.parseDouble(readLine());
System.out.println("Area of traingle
="+triArea(base,height1));
}
}
7. Write a program to implement constructor
overloading by passing different number of parameter of different types.
Source code
public
class Box
{
int length,breadth,height;
Box()
{
length=breadth=height=2;
System.out.println("Intialized with
default constructor");
}
Box(int l, int b)
{
length=l;
breadth=b;
height=2;
System.out.println("Initialized
with parameterized constructor having 2
params");
}
Box(int l, int b, int h)
{
length=l;
breadth=b;
height=h;
System.out.println("Initialized
with parameterized constructor having 3 params");
}
public int getVolume()
{
return length*breadth*height;
}
public static void main(String args[])
{
Box box1 = new Box();
System.out.println("The volume of
Box 1 is :"+ box1.getVolume());
Box box2 = new Box(10,20);
System.out.println("Volume of Box 2
is :" + box2.getVolume());
Box box3 = new Box(10,20,30);
System.out.println("Volume of Box 3
is :" + box3.getVolume());
}
}
8. Write a program to create student report
using applet, read the input using text boxes and display the o/p using
buttons.
Source code
import
java.applet.*;
import
java.awt.*;
import
java.awt.event.*;
/*
<applet code="StudentReport.class",width=500 height=500>
</applet>*/
public
class StudentReport extends Applet implements ActionListener
{
Label
lblTitle,lblRegno,lblCourse,lblSemester,lblSub1, lblSub2;
TextField
txtRegno,txtCourse,txtSemester,txtSub1,txtSub2;
Button cmdReport;
String rno="",
course="",
sem="",sub1="",sub2="",avg="",heading="";
public void init()
{
GridBagLayout gbag= new
GridBagLayout();
GridBagConstraints gbc = new
GridBagConstraints();
setLayout(gbag);
lblTitle = new Label("Enter
Student Details");
lblRegno= new Label("Register
Number");
txtRegno=new TextField(25);
lblCourse=new Label("Course
Name");
txtCourse=new TextField(25);
lblSemester=new Label("Semester
");
txtSemester=new TextField(25);
lblSub1=new Label("Marks of
Subject1");
txtSub1=new TextField(25);
lblSub2=new Label("Marks of
Subject2");
txtSub2=new TextField(25);
cmdReport = new Button("View
Report");
// Define the grid bag
gbc.weighty=2.0;
gbc.gridwidth=GridBagConstraints.REMAINDER;
gbc.anchor=GridBagConstraints.NORTH;
gbag.setConstraints(lblTitle,gbc);
//Anchor most components to the right
gbc.anchor=GridBagConstraints.EAST;
gbc.gridwidth=GridBagConstraints.RELATIVE;
gbag.setConstraints(lblRegno,gbc);
gbc.gridwidth=GridBagConstraints.REMAINDER;
gbag.setConstraints(txtRegno,gbc);
gbc.gridwidth=GridBagConstraints.RELATIVE;
gbag.setConstraints(lblCourse,gbc);
gbc.gridwidth=GridBagConstraints.REMAINDER;
gbag.setConstraints(txtCourse,gbc);
gbc.gridwidth=GridBagConstraints.RELATIVE;
gbag.setConstraints(lblSemester,gbc);
gbc.gridwidth=GridBagConstraints.REMAINDER;
gbag.setConstraints(txtSemester,gbc);
gbc.gridwidth=GridBagConstraints.RELATIVE;
gbag.setConstraints(lblSub1,gbc);
gbc.gridwidth=GridBagConstraints.REMAINDER;
gbag.setConstraints(txtSub1,gbc);
gbc.gridwidth=GridBagConstraints.RELATIVE;
gbag.setConstraints(lblSub2,gbc);
gbc.gridwidth=GridBagConstraints.REMAINDER;
gbag.setConstraints(txtSub2,gbc);
gbc.anchor=GridBagConstraints.CENTER;
gbag.setConstraints(cmdReport,gbc);
add(lblTitle);
add(lblRegno);
add(txtRegno);
add(lblCourse);
add(txtCourse);
add(lblSemester);
add(txtSemester);
add(lblSub1);
add(txtSub1);
add(lblSub2);
add(txtSub2);
add(cmdReport);
cmdReport.addActionListener(this);
}
public void actionPerformed(ActionEvent ae)
{
try{
if(ae.getSource() == cmdReport)
{
rno=txtRegno.getText().trim();
course=txtCourse.getText().trim();
sem=txtSemester.getText().trim();
sub1=txtSub1.getText().trim();
sub2=txtSub2.getText().trim();
avg="Avg Marks:" +
((Integer.parseInt(sub1) + Integer.parseInt(sub2))/2);
rno="Register No:" +
rno;
course="Course :"+ course;
sem="Semester :"+sem;
sub1="Subject1 :"+sub1;
sub2="Subject2 :"+sub2;
heading="Student Report";
removeAll();
showStatus("");
repaint();
}
}catch(NumberFormatException e)
{
showStatus("Invalid
Data");
}
}
public void paint(Graphics g)
{
g.drawString(heading,30,30);
g.drawString(rno,30,80);
g.drawString(course,30,100);
g.drawString(sem,30,120);
g.drawString(sub1,30,140);
g.drawString(sub2,30,160);
g.drawString(avg,30,180);
}
}
9.
Write a program to calculate bonus for different departments
using method overriding.
Source code
abstract
class Department
{
double salary,bonus,totalsalary;
public abstract void calBonus(double salary);
public void displayTotalSalary(String dept)
{
System.out.println(dept+"\t"+salary+"\t\t"+bonus+"\t"+totalsalary);
}
}
class
Accounts extends Department
{
public void calBonus(double sal)
{
salary = sal;
bonus = sal * 0.2;
totalsalary=salary+bonus;
}
}
class
Sales extends Department
{
public void calBonus(double sal)
{
salary = sal;
bonus = sal * 0.3;
totalsalary=salary+bonus;
}
}
public
class BonusCalculate
{
public static void main(String args[])
{
Department acc = new Accounts();
Department sales = new Sales();
acc.calBonus(10000);
sales.calBonus(20000);
System.out.println("Department \t
Basic Salary \t Bonus \t Total Salary");
System.out.println("--------------------------------------------------------------");
acc.displayTotalSalary("Accounts
Dept");
sales.displayTotalSalary("Sales
Dept");
System.out.println("---------------------------------------------------------------");
}
}
10. Write a program to implement thread
priorities.
Source code
class
A extends Thread
{
public void run()
{
System.out.println(" Thread A
started");
for(int i=1;i<5;i++)
System.out.println(" Thread A : i
= "+i);
System.out.println("Exit from Thread
A");
}
}
class
B extends Thread
{
public void run()
{
System.out.println(" Thread B
started");
for(int i=1;i<5;i++)
System.out.println(" Thread B : i
= "+i);
System.out.println("Exit from Thread
B");
}
}
class
C extends Thread
{
public void run()
{
System.out.println(" Thread C
started");
for(int i=1;i<5;i++)
System.out.println(" Thread C : i
= "+i);
System.out.println("Exit from Thread
C");
}
}
class
ThreadPriority
{
public static void main(String args[])
{
A threadA = new A();
B threadB = new B();
C threadC = new C();
threadA.setPriority(Thread.NORM_PRIORITY);
threadB.setPriority(Thread.MAX_PRIORITY);
threadC.setPriority(Thread.MIN_PRIORITY);
System.out.println("Start Thread
A");
threadA.start();
System.out.println("Start Thread
B");
threadB.start();
System.out.println("Start Thread
C");
threadC.start();
System.out.println("End of main
Thread");
}
}
11.
Write a program to
implement thread, applets and graphics by implementing animation of ball
moving.
Source code :
import
java.awt.*;
import
java.applet.*;
/*
<applet code="MovingBall.class" height=300
width=300></applet> */
public
class MovingBall extends Applet implements Runnable
{
int x,y,dx,dy,w,h;
Thread t;
boolean flag;
public void init()
{
w=getWidth();
h=getHeight();
setBackground(Color.yellow);
x=100;
y=10;
dx=10;
dy=10;
}
public void start()
{
flag=true;
t=new Thread(this);
t.start();
}
public void paint(Graphics g)
{
g.setColor(Color.blue);
g.fillOval(x,y,50,50);
}
public void run()
{
while(flag)
{
if((x+dx<=0)||(x+dx>=w))
dx=-dx;
if((y+dy<=0)||(y+dy>=h))
dy=-dy;
x+=dx;
y+=dy;
repaint();
try
{
Thread.sleep(300);
}
catch(InterruptedException e)
{}
}
}
public void stop()
{
t=null;
flag=false;
}
}
12.
Write a program to implement mouse events.
Source code
import
java.awt.*;
import
java.awt.event.*;
import
java.applet.*;
/*<applet
code="KeyBoardEvents" width=400 height=400></applet>*/
public
class KeyBoardEvents extends Applet implements KeyListener
{
String str="";
public void init()
{
addKeyListener(this);
requestFocus();
}
public void keyTyped(KeyEvent e)
{
str+=e.getKeyChar();
repaint(0);
}
public void keyPressed(KeyEvent e)
{
showStatus("Key Pressed");
}
public void keyReleased(KeyEvent e)
{
showStatus("Key Released");
}
public void paint(Graphics g)
{
g.drawString(str,15,15);
}
}
13.
Write a
program to implement keyboard events.
Source code:
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
/*<applet
code="KeyBoardEvents" width=400 height=400></applet>*/
public class KeyBoardEvents
extends Applet implements KeyListener
{
String str="";
public void init()
{
addKeyListener(this);
requestFocus();
}
public void keyTyped(KeyEvent e)
{
str+=e.getKeyChar();
repaint(0);
}
public void keyPressed(KeyEvent e)
{
showStatus("Key Pressed");
}
public void keyReleased(KeyEvent e)
{
showStatus("Key Released");
}
public void paint(Graphics g)
{
g.drawString(str,15,15);
}
}
== The End ==
