Free Source Code

Free Source code for different programming languages like C, C++, Java, Advance Java, J2SE, J2EE, J2ME i.e. Java ME, Android, iPhone, HTML, DHTML, CSS, JavaScript, .Net i.e. Dot.Net, VB.Net, ASP.Net, C#.Net, XML, etc.

Java program to generate random numbers

Objectives:

  • Write a Java program to to generate random numbers and print the same
  • Write a program to generate random numbers
  • Write a program to generate random numbers in Java

Java Program:

[sourcecode lang="java"]

import java.util.Scanner;
import java.util.Random;

class GenerateRandomNumber
{
public static void main(String[] args)
{
int maxRange;

//create objects
Scanner SC = new Scanner(System.in);
Random rand = new Random();

System.out.print("Please enter maximum range: ");
maxRange=SC.nextInt();

for(int i=1; i<=10; i++)
{
System.out.println(rand.nextInt(maxRange));
}
}
}

[/sourcecode]

Output:

Please enter maximum range: 500
467
61
100
449
68
316
445
224
54
498

Find duplicate characters in string

Objectives:

  • Write a Java program to find duplicate characters in the string and print the duplicate characters
  • Write a program to find duplicate characters in String

Java Program:

[sourcecode lang="java"]
public class DuplicateCharacters {
    public static void main(String args[]) {

        String str = "NITIN";
        int count = 0;

        char input[] = str.toCharArray();
        System.out.println("Duplicate Characters are:");

        for (int i = 0; i &amp;lt; str.length(); i++) {
            for (int j = i + 1; j &amp;lt; str.length(); j++) {
                if (input[i] == input [j]) {
                    System.out.println(input[j]);
                    count++;
                    break;
                }
           }
        }
    }
}
[/sourcecode]

Output:

Duplicate Characters are: N I

Passing String in Switch Case in Java

Objectives:

  • How to use switch case in Java?
  • How to use switch case with string in Java?
  • How to pass string literals in switch case in Java?

 

Source Code:

[sourcecode lang=”java”]

public class SwitchWithStringExample

{
public static void main(String[] args)
{
String str = "two";
switch(str)
{
case "one":
System.out.println("one");
break;
case "two":
System.out.println("two");
break;
case "three":
System.out.println("three");
break;
default:
System.out.println("no match");
} // switch close
} // main close
} // class close

[/sourcecode]

 

Steps to run above Java code:

Consider that we have saved code at C drive (c:\>) and the file is saved as SwitchWithStringExample.java

  1. Compilation : c:\> javac SwitchWithStringExample.java
  2. Interpretation : c:\> java SwitchWithStringExample

 

Output:

two

 

We conduct Java Training and Workshop for Corporates and College Students, if interested, please write to us on kloudsancyber@gmail.com

 

Aatul Palandurkar
International Trainer, and Author, NetBeans Dream Team Member

https://www.facebook.com/aatulpalandurkar
https://www.instagram.com/aatulpalandurkar/

Using For Each in Java

Objective:

  • How to use For Each in Java?
  • How to use advance for in Java?
  • How to use advance for loop in Java Programming Language?
  • Types of For loop in Java

 

Source Code:

[sourcecode lang=”Java”]

class ForEachExample
{
public static void main(String args[])
{
//declaring an array
int a[]={1,2,3,4,5,6};

// Old way
System.out.println("Old way");
for(int i=0; i<a.length;i++)
{
System.out.println(a[i]);
}

//New way: for-each loop
System.out.println("For each");
for(int i:a)
{
System.out.println(i);
}
}
}

[/sourcecode]

Area and Circumference of Circle in Python

Objectives:

  • How to find the area of a circle in Python?
  • How to find the circumference of a circle in Python?
  • How to find the area and circumference of a circle in Python?

Python Code:

[sourcecode lang=”python”]

print("Enter radius of circle")
rad = input()
r=float(rad)
area = 3.14 * r * r
circumference = 2 * 3.14 * r
print(area)
print(round(circumference, 2))

[/sourcecode]

Steps to Run the above code:

  • Navigate to the folder/directory where you have saved your python code or file.
  • Here I have considered that python file is saved on “c:\>” and the File name is “Circle.py
  • Just type the following command now to execute the Python program: c:\> python Circle.py

 

Download code:

  • Navigate to GitHub repository and download the code from here: Circle.py

 

We conduct Python Training and Workshop for Corporates and College Students, if interested, please write to us on kloudsancyber@gmail.com

 

Aatul Palandurkar
Life Coach, International Trainer, and Author

https://www.facebook.com/aatulpalandurkar
https://www.instagram.com/aatulpalandurkar/

Hello World in JavaScript

Objective:

  • How to write Hello World in JavaScript?
  • How to write Hello World in JS?
  • How to print Hello World in JavaScript?
  • How to print Hello World in JS?

Source Code :

Here is the sample code for you:

[sourcecode lang=”javascript”]

<html>
<body>
<script language = “javascript” type = “text/javascript”>

document.write(“Hello World!”)

</script>
</body>
</html>

[/sourcecode]

Git Hub:

You can also download this code from link given here : Hello World in JS

Pattern Programs in Java – Pattern 3

Pattern 3 :

1
1 2
1 2 3
1 2 3 4
1 2 3 4 5
1 2 3 4
1 2 3
1 2
1

 

Java Code for above pattern :

[sourcecode lang=”java”]

import java.util.Scanner;

&nbsp;

public class Pattern3

{

public static void main(String[] args)

{

Scanner sc = new Scanner(System.in);

//Taking rows value from the user

System.out.println("How many rows you want in this pattern?");

int rows = sc.nextInt();

System.out.println("Here is your pattern….!!!");

//Printing upper half of the pattern

for (int i = 1; i <= rows; i++)

{

for (int j = 1; j <= i; j++)

{

System.out.print(j+" ");

}

System.out.println();

}

//Printing lower half of the pattern

for (int i = rows-1; i >= 1; i–)

{

for (int j = 1; j <= i; j++)

{

System.out.print(j+" ");

}

System.out.println();

}

//Closing the resources

sc.close();

}

}

[/sourcecode]

Output :

1
1 2
1 2 3
1 2 3 4
1 2 3 4 5
1 2 3 4
1 2 3
1 2
1

 

Pattern Programs in Java – Pattern 2

Pattern 2 :

1
2 2
3 3 3
4 4 4 4
5 5 5 5 5

Java Program for the above pattern:

[sourcecode language=”java”]

import java.util.Scanner;

public class MainClass

{

public static void main(String[] args)

{

Scanner sc = new Scanner(System.in);

//Taking rows value from the user
System.out.println("How many rows you want in this pattern?");

int rows = sc.nextInt();

System.out.println("Here is your pattern….!!!");

for (int i = 1; i <= rows; i++)

{

for (int j = 1; j <= i; j++)

{

System.out.print(i+" ");

}

System.out.println();

}

//Close the resources
sc.close();

}

}

[/sourcecode]

Pattern Programs In Java – Pattern 1

Q. Write a Java program to print given pattern.

Pattern 1 :

1
1 2
1 2 3
1 2 3 4
1 2 3 4 5
1 2 3 4 5 6
1 2 3 4 5 6 7

 

Java Program:

[sourcecode language=”java”]

import java.util.Scanner;

public class MainClass

{

public static void main(String[] args)

{

Scanner sc = new Scanner(System.in);

//Taking rows value from the user

System.out.println("How many rows you want in this pattern?");

int rows = sc.nextInt();

System.out.println("Here is your pattern….!!!");

for (int i = 1; i <= rows; i++)

{

for (int j = 1; j <= i; j++)

{

System.out.print(j+" ");

}

System.out.println();

}

//Close the resources

sc.close();

}

}

[/sourcecode]

Java Program to convert Decimal values to Hexadecimal values

Objectives :

  • How to convert Decimal to Hexadecimal in Java?

 

Java Program to convert Decimal values to Hexadecimal values : 

[sourcecode lang=”java”]

import java.util.Scanner;

public class DecimalToHexadecimal {

public static void main(String[] args) {

Scanner input = new Scanner(System.in);

System.out.print("Enter decimal number you like: ");
int deci = input.nextInt();

System.out.println("The hexadecimal number for decimal "
+ deci + " is " + convert(deci));
}

public static String convert(int decimal) {
String hex = "";

while (decimal != 0) {
int hexValue = decimal % 16;
hex = toHexadecimal(hexValue) + hex;
decimal = decimal / 16;
}

return hex;
}

public static char toHexadecimal(int hexValue) {
if (hexValue <= 9 && hexValue >= 0) {
return (char) (hexValue + ‘0’);
} else {
return (char) (hexValue – 10 + ‘A’);
}
}
}

[/sourcecode]

Output :
Enter decimal number you like: 1234
The hexadecimal number for decimal 1234 is 4D2