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Wednesday 19 October 2011

Java program to find sum, average and modulus by 3, of three numbers by(aol.com)

import java.util.*;
class average
{
public static void main (String args[])
{
Scanner in = new Scanner (System.in);
double a,b,c,sum=0;
double mod,avg;
System.out.print ("\n\t Enter first number = ");
a=in.nextDouble();
System.out.print ("\n\t Enter second number = ");
b=in.nextDouble();
System.out.print ("\n\t Enter third number = ");
c=in.nextDouble();
sum=a+b+c;
avg=sum/3;
mod=sum%3;




System.out.println ("\n\t Sum of the numbers = "+sum);
System.out.println ("\n\t Average of the numbers = "+avg);
System.out.println ("\n\t Modulus of the sum of numbers by 3 = "+mod);
}
}

Java program which calculates next number by adding all previous numbers using exception handling (by Adler Lawn Service, LLC)

import java.util.*;

class EverySum
{
public static void main (String args[])
{
Scanner in = new Scanner (System.in);
int a,b=0;
System.out.println ("\n\t The number must be 50 or less");
System.out.print ("\n\t Enter the nth number = ");
a=in.nextInt();
try
{
if (a>50)
check.test();
else
{
for (int i=1;i<a;++i)
{
b+=i;
System.out.print ("\t "+b);
}
}

}
catch (IndexOutOfBoundsException e)
{
System.out.println ("\n\t Invalid number: "+e);
}


}
}

class check
{
static void test() throws IndexOutOfBoundsException
{
throw new IndexOutOfBoundsException (">50");
}
}

Java program to display ifno of different cars using abstract class (by noor diana fauzi)

import java.util.*;
class CarPrice
{
public static void main (String args[])
{
Ford fr = new Ford();
fr.getcarmaker();
fr.setPrice();
Chevy ch = new Chevy();
ch.getcarmaker();
ch.setPrice();
fr.displyinfo();
ch.displyinfo();
}
}

abstract class Auto
{
abstract void getcarmaker();
abstract void setPrice();
}

class Ford extends Auto
{
Scanner in = new Scanner (System.in);
double price;
String maker;
void getcarmaker()
{
System.out.print ("\n\t Enter the name of car maker = ");
maker=in.nextLine();
}

void setPrice()
{
System.out.print ("\n\t Enter price of "+maker+" car = $");
price=in.nextDouble();
}

void displayinfo()
{
System.out.println ("\n\t Car maker = "+maker);
System.out.println ("\n\t Car Price = $"+price);
}
}

class Chevy extends Auto
{
Scanner in = new Scanner (System.in);
double price;
String maker;
void getcarmaker()
{
System.out.print ("\n\t Enter the name of car maker = ");
maker=in.nextLine();
}

void setPrice()
{
System.out.print ("\n\t Enter price of "+maker+" car = $");
price=in.nextDouble();
}

void displayinfo()
{
System.out.println ("\n\t Car maker = "+maker);
System.out.println ("\n\t Car Price = $"+price);
}
}

Java program to find area of a square and rectangle using abstract class (by noor diana fauzi)

import java.util.*;
class area
{
public static void main (String args[])
{
Scanner in = new Scanner (System.in);
double base,height;
System.out.print ("\n\t Enter base of the Rectangle = ");
base=in.nextDouble();
System.out.print ("\n\t Enter height of the Rectangle = ");
height=in.nextDouble();

double side1,side2;
System.out.print ("\n\t Enter length of side1 of the Square = ");
side1=in.nextDouble();
System.out.print ("\n\t Enter length of side2 of the Square = ");
side2=in.nextDouble();

Rectangle ob1 = new Rectangle (base,height);
Square ob2 = new Square (side1,side2);
ob1.area();
ob2.area();
}
}


abstract class Shape
{
abstract void area();
}

class Rectangle extends Shape
{
double base,height,a;
Rectangle(double b, double l)
{
base=b;
height=l;
}
void area()
{
a=base*height;
System.out.println ("\n\t Area of Rectangle = "+a);
}
}

class Square extends Shape
{
double side1,side2,a;
Square (double s1, double s2)
{
side1=s1;
side2=s2;
}
void area()
{
a=side1*side2;
System.out.println ("\n\t Area of Square = "+a);
}
}

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