Programs list : :
- Celsius
- Palindrome
- Bank account
- Interfaces
- Multiple threads
- Applet to calculate largest of three
- Mouse Event
- Mouse Position
- Flowlayout
Celsius
import java.io.*;
class celsius{
public static void main(String args[]){
double cel[]=new double[15];
double far[]=new double[15];
for(int i=0;i<args.length;i++)
{
far[i]=Double.parseDouble(args[i]);
cel[i]=(far[i]-32)/1.8;
}
System.out.println("S.no\tFarenhit \tcelsius");
for(int i=0;i<args.length;i++)
System.out.println((i+1)+"\t"+far[i]+"\t"+cel[i]);
}
}
Palindrome
import java.io.*;
class palindrome{
public static void main(String args[]){
String s=new String(args[0]);
String rs=new String();
for(int i=s.length()-1;i>=0;i--){
System.out.println(rs+"\n");
rs=rs+s.charAt(i);
}
if(s.equals(rs)) System.out.println("palindrome");
else System.out.println("Not palindrome");
}
}
Bank account
import java.io.*;
class account{
String name;
int number,balance;
char type;
account(String n,int b,char t)
{
number=1000212;
name=n;
balance=b;
type=t;
}
void deposit(int amt){
if(amt>0) balance=balance+amt;
}
void withdraw(int amt){
System.out.println("Previous account balance"+balance);
balance=balance-amt;
System.out.println("Current account balance"+balance);
}
void display(){
System.out.println("Name:"+name);
System.out.println("Account no:"+number);
System.out.println("Account type:"+type);
System.out.println("Account balance:"+balance);
}
public static void main(String args[]){
if(args.length<3){
System.out.println("Run the program with
String arguments:java account ");
return;
}
account acc=new account(args[0],
Integer.parseInt(args[1]),args[2].charAt(0));
acc.display();
DataInputStream in=new DataInputStream(System.in);
try{
System.out.println("Enter deposit amt:");
acc.deposit(Integer.parseInt(in.readLine()));
System.out.println("Enter withdraw amt:");
acc.withdraw(Integer.parseInt(in.readLine()));
}
catch(IOException e){}
}
}
Interfaces
import java.io.*;
class student{
int rlno;
void getnum(int n){
rlno=n;
}
void putnum(){
System.out.println("Rollno=="+rlno);
}
}
class test extends student{
float part1,part2;
void getmarks(float m1,float m2){
part1=m1;
part2=m2;
}
void putmarks(){
System.out.println("Marks obtained");
System.out.println("Part1="+part1);
System.out.println("Part2="+part2);
}
}
interface sports{
float sportwt=6.0f;
void putwt();
}
class results extends test implements sports{
public void putwt(){
System.out.println("sports wt="+sportwt);
}
void display(){
float total=part1+part2+sportwt;
putnum();
putmarks();
putwt();
System.out.println("Total Score="+total);
}
}
class intfc{
public static void main(String args[]){
results re=new results();
re.getnum(2755);
re.getmarks(27.5F,33.0F);
re.display();
}
}
MultiThreads
import java.io.*;
import java.lang.*;
class A extends Thread{
public void run(){
System.out.println("Thread A started");
for(int i=0;i<5;i++)
System.out.println("From Thread A :i="+i);
System.out.println("Exit from A");
}
}
class B extends Thread{
public void run(){
System.out.println("Thread B started");
for(int j=0;j<5;j++)
System.out.println("From Thread B :j="+j);
System.out.println("Exit from B");
}
}
class C extends Thread{
public void run(){
System.out.println("Thread C started");
for(int k=0;k<5;k++)
System.out.println("From Thread C :k="+k);
System.out.println("Exit from C");
}
}
class ThreadTest{
public static void main(String args[]){
new A().start();
new B().start();
new C().start();
}
}
Applet for largest of 3 numbers
import java.applet.*;
import java.awt.*;
public class large extends Applet{
TextField t1,t2,t3;
public void init(){
t1=new TextField(8);
t2=new TextField(8);
t3=new TextField(8);
add(t1);
add(t2);
add(t3);
t1.setText("0");
t2.setText("0");
t3.setText("0");
}
public void paint(Graphics g){
int x=0,y=0,max=0,z=0;
g.drawString("Input no. is each box",10,50);
try{
x=Integer.parseInt(t1.getText());
y=Integer.parseInt(t2.getText());
z=Integer.parseInt(t3.getText());
}catch(Exception e){}
max=x;
if(y>max)max=y;
if(z>max)max=z;
g.drawString("The max is "+String.valueOf(max),10,76);
}
public boolean action(Event e,Object o)
{
repaint();
return(true);
}
}
//HTML CODE
</pre> <pre>
Mouse Event
import java.awt.*;
import java.awt.event.*;
public class msevent extends Frame implements MouseListener{
int x=0,y=0;
public msevent(){
setTitle("Msevent");
addMouseListener(this);
}
public static void main(String args[]){
Frame f=new msevent();
f.setSize(200,200);
f.setVisible(true);
}
public void mousePressed(MouseEvent e)
{ x=e.getX(); y=e.getY(); repaint();}
public void mouseClicked(MouseEvent e){}
public void mouseExited(MouseEvent e){}
public void mouseReleased(MouseEvent e){}
public void mouseEntered(MouseEvent e){}
public void paint(Graphics g){
g.setColor(Color.blue);
g.fillRect(x-5,y-5,50,50);
}
}
Mouse position
import java.awt.*;
import java.awt.event.*;
public class msposition extends Frame implements MouseListener
{
int x=0,y=0;
public msposition(){
setTitle("Msevent");
addMouseListener(this);
}
public static void main(String args[]){
Frame f=new msposition();
f.setSize(200,200);
f.setVisible(true);
}
public void mousePressed(MouseEvent e)
{x=e.getX();y=e.getY();repaint();}
public void mouseClicked(MouseEvent e){}
public void mouseExited(MouseEvent e){}
public void mouseReleased(MouseEvent e){}
public void mouseEntered(MouseEvent e){}
public void paint(Graphics g){
g.drawString(x+" "+y,50,50);
}
}
Flowlayout
import java.awt.*;
import java.awt.event.*;
public class layout extends Frame implements ActionListener{
Button numBt[]=new Button[10];
public layout(){
setTitle("FlowLayout");
setLayout(new FlowLayout(FlowLayout.LEFT,5,10));
Panel p1=new Panel();
p1.setLayout(new FlowLayout(FlowLayout.LEFT,5,10));
for(int i=0;i<3;i++)
p1.add(numBt[0]=new Button("Button 1"+i));
add(p1);
Panel p2=new Panel();
p2.setLayout(new FlowLayout(FlowLayout.LEFT,10,20));
for(int i=0;i<3;i++)
p2.add(numBt[0]=new Button("Button 2"+i));
add(p2);
}
public static void main(String args[]){
Frame f=new layout();
f.setSize(500,500);
f.setVisible(true);
}
public void actionPerformed(ActionEvent e){}
}
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