JAVA PROGRAMS-Interface Demo program in java

Interface Demo program in java

Program Name:- inter1

import java.io.*;

interface demo

{

final double pi=3.14;

abstract double area(int r);

}

interface demo1

{

abstract double circum(int r);

}

class cir implements demo,demo1

{

public double area(int r)

{

return pi*r*r;

}

public double circum(int a)

{

return 2*pi*a*a;

}

}

class inter1

{

public static void main(String arg[])

{

cir c=new cir();

System.out.print("\nCircle\t:"+c.area(5));

System.out.print("\nCircum\t:"+c.circum(5));

}

}

JAVA PROGRAMS-Hierarchical Inheritance in Java

Hierarchical Inheritance in Java

Program Name:- hiear.java

import java.io.*;
class vehicle
{
String regno;
int model;
 vehicle(String r,int m)
 {
 regno=r;
 model=m;
 }
 void display2()
 {
 System.out.print("\nRegistration number\t:"+regno);
 System.out.print("\nModel\t\t\t:"+model);
 }
}
class roadvehicle extends vehicle
{
int noof;
 roadvehicle(String r,int m,int n)
 {
 super(r,m);
 noof=n;
 }
 void display()
 {
 System.out.print("\n\n\t Road Vehicle\n\n");
 super.display2();
 System.out.print("\nNumber of wheel\t:"+noof);
 }
}
class watervehicle extends vehicle
{
int nn;
 watervehicle(String s,int m,int n)
 {
 super(s,m);
 nn=n;
 }
 void display1()
 {
 System.out.print("\n\n\t Water Vehicle\n\n");
 super.display2();
 System.out.print("\nNumber of leaf\t:"+nn);
 }
}
public class hiear
{
 public static void main(String[]args)
 {
 roadvehicle r;
 watervehicle w;
 r=new roadvehicle("TN 58 s 5482",2011,2);
 w=new watervehicle("TN  57 A 5828",2011,10);
 r.display();
 w.display1();
 }
}

JAVA PROGRAMS-Multi Level Inheritance in Java

Multi Level Inheritance in Java

Program Name:- multi.java

import java.io.*;

class box1

{

int length,width,height;

box1()

 {

 length=0;

 width=0;

 height=0;

 }

box1(int l)

 {

 length=width=height=l;

 }

box1(int l,int w,int h)

 {

 length=l;

 width=w;

 height=h;

 }

int volume()

 {

 int v;

 v=length*width*height;

 return(v);

 }

}

class boxweight extends box1

{

double weight;

boxweight()

 {

 super();

 weight=0;

 }

boxweight(int l,double m)

 {

 super(l);

 weight=m;

 }

boxweight(int l,int w,int h,double m)

 {

 super(l,w,h);

 weight=m;

 }

}

class shipping extends boxweight

{

double cost;

shipping()

 {

 super();

 cost=0;

 }

shipping(int l,double m,double c)

 {

 super(l,m);

 cost=c;

 }

shipping(int l,int h,int w,double m,double c)

 {

 super(l,w,h,m);

 cost=c;

 }

}

class multi

{

public static void main(String args[])

{

shipping s1=new shipping(10,5,7,100.1,150.2);

shipping s2=new shipping(5,2,10,20.0,115.50);

double vol1,vol2;

vol1=s1.volume();

vol2=s2.volume();

System.out.println("\n\t Shipping list");

System.out.print("\n\n Volume weight cost");

System.out.print("\n"+vol1+" "+s1.weight+"rs\t"+s1.cost);

System.out.print("\n"+vol2+" "+s2.weight+"rs\t"+s2.cost);

 }

}