Program to Demonstrate Inheritance in Java

Posted on February 7, 2011 by Lalit Mali

Instructions: 1.)Save this program to a file and name it Inheritance.java

import javax.swing.JOptionPane;

class SuperClass //The Superclass

{

String str="We Got Copieeed!!!";

void func()

{

JOptionPane.showMessageDialog(null, str); //Prints the string 'str' in a window.

}

class SubClass extends SuperClass //The SubClass inheriting SuperClass

{

}

public class Inheritance {

public static void main(String[] args) //Our main

{

SubClass sub1= new SubClass(); //SubClass Object Initialization.

sub1.func(); //Call to function of SuperClass via object of the Subclass

}

Tested in compilers: Eclipse and Command Line.

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How to Compile a Java program in Eclipse

Posted on February 7, 2011 by Vlad

Step 1: When you start eclipse, it asks your for the address of the workspace. Workspace is a folder where eclipse will store all your project files. Step 2: To start a new project go to New->JAVA project. Step 3: …

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Input using GUI in Java

Posted on February 6, 2011 by Vlad

This is a simple program to take input from a user using GUI.

import javax.swing.*; //Imports swing package which contains the JOptionPane class.

public class MyClass {

public static void main(String args[])

{

String f_name= JOptionPane.showInputDialog("First name:"); //Input

String l_name= JOptionPane.showInputDialog("Last Name:"); //Input

JOptionPane.showMessageDialog(null, f_name+ " " +l_name); //Output

}

Tested in Compilers: Eclipse and command Line

Program to Demonstrate Bubble Sort in C++

Posted on February 5, 2011 by Lalit Mali

Bubble sort, also known as sinking sort, is a simple sorting algorithm that works by repeatedly stepping through the list to be sorted, comparing each pair of adjacent items and swapping them if they are in the wrong order. The pass through the …

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Program to find the GCD of a number using C++

Posted on February 5, 2011 by Vlad

#include<iostream>

void main()

{

using namespace std;

int num1,num2;

cout<<"Enter 1st no. ";

cin>>num1;

cout<<"Enter 2nd no. ";

cin>>num2;

while(num1!=num2)

{

if(num1>num2)

{

num1 = num1-num2;

}

else

{

num2 = num2-num1;

}

cout<<"GCD is = "<<num1;

cin.get();

}

Program to find the LCM of a number

Posted on February 4, 2011 by Lalit Mali

#include<iostream>

void main()

{

using namespace std;

int num1,num2,a,b;

cout<<"Enter 1st no. ";

cin>>num1;

cout<<"Enter 2nd no. ";

cin>>num2;

a=num1;

b=num2;

while(a!=b)

{

if(a<b)

{

a+=num1;

}

else

{

b+=num2;

}

cout<<"LCM is = "<<a;

cin.get();

}

Java: Simple Hello World program to display a message.

Posted on February 3, 2011 by Lalit Mali

This is a simple program to display a message in java.

class Message

{

public static void main (String args[])

{

System.out.println("Hello World!"); // Displays a message

}

C++ Program to find the factorial of a number.

Posted on February 3, 2011 by Lalit Mali

In this program, we see a simple way to calculate the factorial of a number. In this program, We use a for loop for multiplying all the numbers from 1 to ‘num‘. We use 3 variables: num (for storing the number), …

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