Some Example programs

Inheritance Area:

import java.util.*;

class rectangle

{

int l,h,rect;

Scanner sc=new Scanner(System.in);

void get()

{

System.out.println("Enter The Length Of The Rectangle");

l=sc.nextInt();

System.out.println("Enter The Height of the Rectangle");

h=sc.nextInt();

rect=l*h;

}

void put()

{

System.out.println("Area Of Rectangle="+rect);

}

}

class square extends rectangle

{

int a,area;

void gett()

{

System.out.println("Enter The Value For The Square");

a=sc.nextInt();

area=a*a;

get();

}

void putt()

{

System.out.println("Area Of Square="+a);

put();

}

public static void main(String args[])

{

square sq=new square();

sq.gett();

sq.putt();

}

}

PROGRAM:

GRID LAYOUT:

import javax.swing.*;

import java.awt.*;

class sss

{

public static void main(String args[])

{

JFrame f=new JFrame();

JPanel p=new JPanel();

f.setTitle("Calculator");

f.setSize(300,300);

JButton b1=new JButton("ADD");

JButton b2=new JButton("sub");

JButton b4=new JButton("DIV");

JButton b5=new JButton("MUL");

JButton b6=new JButton("LOG");

JButton b7=new JButton("SQUARE");

JButton b8=new JButton("ROOT");

JButton b9=new JButton("1/X");

p.add(b1);

p.add(b2);

p.add(b4);

p.add(b5);

p.add(b6);

p.add(b7);

p.add(b8);

p.add(b9);

f.add(p);

GridLayout g=new GridLayout(2,2);

p.setLayout(g);

f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

f.setVisible(true);

}

}

SIGN IN FORM:

import javax.swing.*;

import java.awt.*;

class sss

{

public static void main(String args[])

{

JFrame f=new JFrame();

JPanel p=new JPanel();

f.setTitle("Calculator");

f.setSize(300,300);

JLabel jj=new JLabel("USER NAME");

JLabel jj1=new JLabel("PASSWORD");

JTextField th=new JTextField("");

JPasswordField ps=new JPasswordField("");

JButton b1=new JButton("SUBMIT");

p.add(jj);

p.add(th);

p.add(jj1);

p.add(ps);

p.add(b1,BorderLayout.SOUTH);

f.add(p);

GridLayout g=new GridLayout(1,1);

p.setLayout(g);

f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

f.setVisible(true);

}

}

FACTORIAL USING PACKAGE:

package p1;

import java.util.*;

public class sss{

public void fact()

{

Scanner sc=new Scanner(System.in);

  System.out.println("enter the number");

  int a=sc.nextInt();

  int fact= 1;

  System.out.println("Factorial of " +a+ ":");

  for (int i= 1; i<=a; i++){

  fact=fact*i;

  }

  System.out.println(fact);

  }

 

Main File:

Import p1.*;

Class main

{

Public static void main(String args[])

{

 Sss s=new sss();

s.fact();

}

}

Factorial using interface:

import java.util.*;

interface if

{

public void fact();

}

class sss implements if

{

int a;

Scanner sc=new Scanner(System.in);

 

public void fact()

{

  System.out.println("enter the number");

 a=sc.nextInt();

  int fact= 1;

  System.out.println("Factorial of " +a+ ":");

  for (int i= 1; i<=a; i++){

  fact=fact*i;

  }

  System.out.println(fact);

  }

public static void main(String args[])

{

sss s=new sss();

s.fact();

}

}