Category Archives: Java Programs

Java Programs

Java Program to Calculate area of rectangle

In this tutorial, we will learn to create a Java program that will Calculate Area of Rectangle using Java programming.

Prerequisites

Before starting with this tutorial we assume that you are best aware of the following Java programming topics:

Java Operators.
Basic Input and Output
Class and Object.
Basic Java programming.

What is area of Rectangle?

Area of any Subject(Object) is the size of a surface covered by Subject, Which you can calculate by multiplying the length * width So Area of Rectangle (area) is the product of length ‘L’ and width or breadth ‘B’. So, Area of Rectangle = (L × B) square units.

Java Program to Calculate area of rectangle

In this program , we will calculate Area of Rectangle of a given Length and Width .First of all user will be prompted to enter Length and Width and afterword passing these value to function to calculate Area of Rectangle.Lets have look at the program below.

import java.util.Scanner;

class AreaOfRectangle 
{
   public static void main(String args[]) 
    {   
       
      Scanner s= new Scanner(System.in);
        
         System.out.println("Enter the length:"); // Taking value form user of length and breadth
         double length= s.nextDouble();
        System.out.println("Enter the breadth:");
         double breadth= s.nextDouble();
        
          
          double  area=length*breadth; // Calculating Area 
     //Printing area of rectangle...
      System.out.println("Area of Rectangle is: " + area);      
   }
}

import java.util.Scanner;

class AreaOfRectangle

{

public static void main(String args[])

{

Scanner s= new Scanner(System.in);

System.out.println("Enter the length:"); // Taking value form user of length and breadth

double length= s.nextDouble();

System.out.println("Enter the breadth:");

double breadth= s.nextDouble();

double area=length*breadth; // Calculating Area

//Printing area of rectangle...

System.out.println("Area of Rectangle is: " + area);

}

Output

In the above program, we have first declared and initialized a set variables required in the program.

length = it will hold entered length.
width = it will hold entered width.
area= it will hold the result i.e Area or Rectangle.

Area of a Rectangle is a product of its length and breadth. So,to calculate the area of a rectangle First we will get length and breadth of the rectangle from user.As shown n image below.

Now, we will calculate their product to get the area or rectangle.

After, calculating their multiplication returns us the area of rectangle or given length and width,

Finally we will print the area of rectangle of given values.

Java Program to Calculate the Area of a Circle

In this tutorial, we will learn to create a Java program that will Calculate Area of Cricle using Java programming.

Prerequisites

Before starting with this tutorial we assume that you are best aware of the following Java programming topics:

Java Operators.
Basic Input and Output function in Java.
Class and Object in Java.
Basic Java programming.

What is Area of Circle?

In Mathematics, the space occupied by the circle in a two-dimensional plane enclosed by a circle of radius r so area of circle is = (π r*r). where π is a Greek word that represents the constant ratio of the circumference of any circle which is approx equal to 3.1416.

Java Program to Calculate the Area of a Circle

In this program , we will calculate Area of Circle of a given Radius .First of all user will be prompted to enter Radius and afterword passing these value to formula to calculate Area of Circle.

import java.util.Scanner;

public class AreaofCircle {

 public static void main(String ag[]) {
  int radius;
  double pi = 3.14, area; //Declaring variables
  Scanner s = new Scanner(System.in);
  System.out.print("Enter radius of circle:");
  radius = s.nextInt();
  
  area = pi * radius * radius; //Calculating area
  
  System.out.println("Area of circle:" + area); //Printing area..
 }
}

import java.util.Scanner;

public class AreaofCircle {

public static void main(String ag[]) {

int radius;

double pi = 3.14, area; //Declaring variables

Scanner s = new Scanner(System.in);

System.out.print("Enter radius of circle:");

radius = s.nextInt();

area = pi * radius * radius; //Calculating area

System.out.println("Area of circle:" + area); //Printing area..

}

Output

In the above program, we have first declared and initialized a set variables required in the program.

radius = it will hold entered length.
area= it will hold the result i.e Area or Circle.

Area of a Circle is a product π (which is constant) and Multiplication of radius twice r*r So,to calculate the area of a Circle.First we will Declare variables as shown in below image.

After that take value of radius from user .

And using known formula of area of circle which is (π r*r) where π is a constant and r is radius

here we use “pi” in place or symbol of “π” which is constant and calculate the area of circle of given radius by user.At the end we will calculate area of Circle and print the value area.

Java Program to Make a Simple Calculator Using switch case

In this tutorial, we will learn to create a Java program to make a simple Calculator using Switch case using Java programming.

Prerequisites

Before starting with this tutorial we assume that you are best aware of the following Java programming topics:

Java Operators.
Basic Input and Output
Class and Object.
Basic Java programming.
if-else statements.
Switch case.
Nested if-else Statements.
Java Scanner class.

What is calculator?

Calculator is a electronic device that is used to performing arithmetic operations on numbers.The Calculators do Addition, Subtraction,Multiplication, and Division… and function like that.

Java Program to Make a Simple Calculator Using switch case

In this our program we will create a small calculator using switch case . We would first declared and initialized the required variables. Next, we would prompt user to input the two values . Later in the program we will ask a operator and values to perform that particular operation in our program.

import java.util.Scanner;

public class Calculator {

    public static void main(String[] args) {

    	double a,b,result; // Declaring a variables 
        Scanner s = new Scanner(System.in);
        System.out.print("Enter first number value:");
        a = s.nextDouble(); // getting values from user...
        System.out.print("Enter second number value:");
        b = s.nextDouble();

        System.out.print("Enter any operator (+, -, *, /): ");
        char opt = s.next().charAt(0); // taking operator

        switch(opt) // using switch case to create Caluclator
        {
            case '+':
            	result = a + b;
                break;    // condition for addition

            case '-':
            	result =a - b; 
                break; // condition for subtraction

            case '*':
            	result = a * b;
                break; // condition for Multiplicatin

            case '/':
            	result = a / b;
                break; // condition for Divison

                default: 
                System.out.printf("You have entered wrong operator or value");
                return;
        }

        System.out.println(a+" "+opt+" "+b+": "+result);
    }
}

import java.util.Scanner;

public class Calculator {

public static void main(String[] args) {

double a,b,result; // Declaring a variables

Scanner s = new Scanner(System.in);

System.out.print("Enter first number value:");

a = s.nextDouble(); // getting values from user...

System.out.print("Enter second number value:");

b = s.nextDouble();

System.out.print("Enter any operator (+, -, *, /): ");

char opt = s.next().charAt(0); // taking operator

switch(opt) // using switch case to create Caluclator

{

case '+':

result = a + b;

break; // condition for addition

case '-':

result =a - b;

break; // condition for subtraction

case '*':

result = a * b;

break; // condition for Multiplicatin

case '/':

result = a / b;

break; // condition for Divison

default:

System.out.printf("You have entered wrong operator or value");

return;

}

System.out.println(a+" "+opt+" "+b+": "+result);

}

Output

In the above program, we have first declared and initialized a set variables required in the program.

a= it will hold First value.
b= it will hold second value.
opt=it will hold operator value.

And in the next statement user will be prompted to enter two values and which will be assigned to variable ‘a‘ and ‘b‘ respectively.

And after taking the values form user we will ask to input symbol to perform following tasks.

After taking both the values of variable and opt we will pass the value of opt to switch case to Calculate values

The above statements compute the addition of two numbers and print the output.

Finally, with the break statement compiler ends the execution of program at switch statement.And we can perform different operation given different different operators and different values in our program as shown above in our program.

Java Program to Display Factors of a Number

In this tutorial, we will learn to create a Java program that will Display Factors of a Number using Java programming.

Prerequisites

Before starting with this tutorial we assume that you are best aware of the following Java programming topics:

Java Operators.
Basic Input and Output
Class and Object.
Basic Java programming.
Java Loops.
If-else Statements.

What Is Factor of a Number?

Factors:=>Factors of a number are that numbers that divide the number completely and remainder of divisor is equal to zero.
Example:- Let say the numbers= 1, 2, 3, 4, 6 and 12 divides the number 12 completely so they are called the factor of 12.

Java Program to Display Factors of a Number

In our program we will Find factors of a given Number.Firstly we declare required header file and variable and also initiates required values in variable. Next we take value from user and find all possible factors of a number.

import java.util.Scanner;
public class Factor 
{

  public static void main(String[] args) 
  {
    // Declaring vriables..
    int num ,i ;
    Scanner s = new Scanner(System.in);
    System.out.print("Enter a number:: ");
    num = s.nextInt(); // takin value from user
    System.out.print("Factors of " + num + " are: ");

    // loop run till number..
    for (i = 1; i <= num; ++i) 
    {
      if (num % i == 0)  // finding factor
      {
      System.out.print(i + " "); // Printing fators
      }
    }
  }
}

import java.util.Scanner;

public class Factor

{

public static void main(String[] args)

{

// Declaring vriables..

int num ,i ;

Scanner s = new Scanner(System.in);

System.out.print("Enter a number:: ");

num = s.nextInt(); // takin value from user

System.out.print("Factors of " + num + " are: ");

// loop run till number..

for (i = 1; i <= num; ++i)

{

if (num % i == 0) // finding factor

{

System.out.print(i + " "); // Printing fators

}

Output

In our program we will take a positive integer value from user by prompting user and with the help of loop and if else statement we will displays all the positive factors of that number.

In the above program, we have first declared and initialized a set variables required in the program.

num = It will hols number given by user.
i= for iteration of loop and finding factor.

Logic behind finding factors of a given number is we that we run a for loop from 1 to number and within the loop increment the value of by 1 in each iteration.
The loop structure of for loop should look like this.

Within the for loop in each iteration we will check the condition for i is a factor of number or not. To find factor we use divisibility of number by using modulo operator(%).

i.e. if( num % i == 0) then i is a factor of number .
If i is a factor of number then we will print the value of i.So we will get the required factors of given number repeatably repeating this process thought out the loop to get all the factors .

Java Program to Check Armstrong Number

In this tutorial, we will learn to create a Java program that will Check Armstrong Number using Java programming.

Prerequisites

Before starting with this tutorial we assume that you are best aware of the following Java programming topics:

Java Operators.
Basic Input and Output
Class and Object.
Basic Java programming.
Loops.
If-else statement.

What Is Armstrong Number?

A number is called An Armstrong is a number in which the sum of the cube of the individual digits in number is equal to the number itself. For example 0, 1, 153, 370, 371 and 407 are the Armstrong numbers. Let’s try to understand why 153 is an Armstrong number.

407 = ((4*4*4)+(0*0*0)+(7*7*7) )

407 =( 64 + 0 + 343)

407 = 407 (So this is an Armstrong number.)

Similarly, Let’s take number 370 and understand why 370 is an Armstrong number.

370=(3*3*3+7*7*7+0*0*0)

370=(27+343+0)

370=370.(So this is a Armstrong number.)

Java Program to Check Armstrong Number

In this program we will find whether a given three digit number is Armstrong number or not using while loop. We would first declared and initialized the required variables. Next, we would prompt user to input a three digit number. Later we will find given no is Armstrong number or not.

public class JavaExample {

    public static void main(String[] args) {

        int no = 154, numb, temp, armno = 0; //Declaring variables

        numb = no; // copying original value.
        while (numb != 0) // checking Armstrong condition
        {
            temp = numb % 10;
            armno = armno + temp*temp*temp;
            numb /= 10;
        }

        if(armno == no) // Armstrong number...
            System.out.println(no + " is an Armstrong number");
        else
            System.out.println(no + " is not an Armstrong number");
    }
}

public class JavaExample {

public static void main(String[] args) {

int no = 154, numb, temp, armno = 0; //Declaring variables

numb = no; // copying original value.

while (numb != 0) // checking Armstrong condition

{

temp = numb % 10;

armno = armno + temp*temp*temp;

numb /= 10;

}

if(armno == no) // Armstrong number...

System.out.println(no + " is an Armstrong number");

else

System.out.println(no + " is not an Armstrong number");

}

Output

Armstrong Number..

Not a Armstrong Number.

In the above program, we have first declared and initialized a set variables required in the program.

no = take given number by user.
numb= to copy original no.
temp= for holding remainder
armno= for result.

Here we created a program in which we find a three digit number is a Armstrong number or not. First we copy the original no to numb variable and then with the help of while loop iterate loop until we reach the last value or given no.

And in loop we break the number’s last digit and multiply this number three time itself and store in armno variable and after that we break numb to two digit no with (/) operator and copy the new two digit number in our armno variable and repeat this process to last number

then we compare the given number and armno is equal it to the given no if they are equal

then the number is Armstrong number else the given number is not a Armstrong number.

Java Program to Check Whether a Number is Prime or Not

In this tutorial, we will learn to create a Java program that will Check Whether a Number is Prime or not using Java programming.

Prerequisites

Before starting with this tutorial we assume that you are best aware of the following Java programming topics:

Java Operators.
Basic Input and Output
Class and Object.
Basic Java programming.
If-else Statements.
Loop in Java.

What Is Prime number?

Any positive Number which is bigger than 1 and it can only divisible by itself and by 1 and it has maximum of factors is two is called as Prime number.Rather we can say that a prime number is a number which only divided by him or 1.

Example:->

primeno

Note : 2 is the only positive(even) number and smallest integer prime number.

Java Program to Check Whether a Number is Prime or Not

In our program we will find that given number by user is Prime number or not using while loop.
Firstly we declare required header file and variable and also initiates required values in variable. Next we take value from user at run time and then after we will find that the given value is prime number or not.

import java.util.Scanner;
public class Prime {

  public static void main(String[] args) 
  {

    int number, i = 2; // Declaring variables
    boolean Count = false;
    Scanner s = new Scanner(System.in);
    System.out.print("Enter any number ");
    number = s.nextInt(); // taking value form user..
    
    while (i <= number / 2)  // Checking condition for Prime
    {
      // condition for Prime number
      if (number % i == 0) {
        Count = true;
        break;
      }

      ++i;
    }

    if (!Count) // Printing Prime  or not
      System.out.println(number + " is a prime number.");
    else
      System.out.println(number + " is not a prime number.");
  }
}

import java.util.Scanner;

public class Prime {

public static void main(String[] args)

{

int number, i = 2; // Declaring variables

boolean Count = false;

Scanner s = new Scanner(System.in);

System.out.print("Enter any number ");

number = s.nextInt(); // taking value form user..

while (i <= number / 2) // Checking condition for Prime

{

// condition for Prime number

if (number % i == 0) {

Count = true;

break;

}

++i;

}

if (!Count) // Printing Prime or not

System.out.println(number + " is a prime number.");

else

System.out.println(number + " is not a prime number.");

}

Output

Prime Number

Not a Prime Number

In the above program, we have first declared and initialized a set variables required in the program.

number = number to hold given value.
count = count for number divisibility occurrence.
i= for iteration of a loop.

In the next statement user will prompted to enter a number which will be assigned to variable ‘number’. Now loop start from 2 to a given number.

In ever while condition we will check ‘number’ is completely divisible by ‘i’ or not.

Then we check if number that divides completely we set Count Value to ‘true’.

or else the value of the value of count default is set to False

So , if given number is Prime after the end of loop the value of count=true

however if given number is not the value of count is false

So , we will check that if number is a prime number then the value of count must be true.

Java Program to Calculate the Sum of Natural Numbers

In this tutorial, we will learn to create a Java program that will Calculate the sum of Natural Number using Java programming.

Prerequisites

Before starting with this tutorial we assume that you are best aware of the following Java programming topics:

Java Operators.
Basic Input and Output
Class and Object.
Basic Java programming.
Loop in Java
While loop For loops.

What Is Natural Number?

Simply all the counting numbers {1, 2,3.4…} are commonly called Natural numbers.Natural numbers include all the positive integers from 1 to infinity.

Java Program to Calculate the Sum of Natural Numbers

In this program we will Create a Java program that will Calculate the sum of Natural Number.Firstly we declare required header file and variable and also initiates required values in variable. Next we take value from user at run time and then after we will find the sum of all natural number to given number.

import java.util.Scanner;

 public class Natural_Numb
 {
    public static void main(String[] args) 
    {

    int number, i,sum = 0; //declaring avriables
    
    Scanner s = new Scanner(System.in);
    System.out.print("Enter any number ");
    number = s.nextInt(); // taking vallue from user..

        for(i = 1; i <= number; ++i) // Calculating sum
        {
            // sum = sum + i;
            sum += i;
        }

        System.out.println("Sum = " + sum); //printing sum..
    }
}

import java.util.Scanner;

public class Natural_Numb

{

public static void main(String[] args)

{

int number, i,sum = 0; //declaring avriables

Scanner s = new Scanner(System.in);

System.out.print("Enter any number ");

number = s.nextInt(); // taking vallue from user..

for(i = 1; i <= number; ++i) // Calculating sum

{

// sum = sum + i;

sum += i;

}

System.out.println("Sum = " + sum); //printing sum..

}

Output

Our program loops from 1 to the given (10) and adds all numbers to the variable Sum
sum=sum+i. and after calculating value we will print sum or all natural number.

In the above program, we have first declared and initialized a set variables required in the program.

number=to take value from user.
i =For iteration.
sum = for counting sum of numbers.

In the above program, we have first declared and initialized a set variables required in the program. In our program first we will take a value from user.After that we will start loop from 1 to given number.

Within the loop, we add all values in variable Sum .After calculating values of all natural number between the given numbers natural number.

At last we will Print sum of the all Natural number between 1 to given number.

Java Program to Check Leap Year

In this tutorial, we will learn to create a Java program that will Check Leap Year using Java programming.

Prerequisites

Before starting with this tutorial we assume that you are best aware of the following Java programming topics:

Java Operators.
Basic Input and Output
Class and Object.
Basic Java programming.
If Else statements
Loops.

What is Leap Year?

Logic behind to check whether a year is leap or not is:
Logic of Leap Year:
If the given value is completely divisible by 4, 100 and 400 then it is a leap year.
If the given value is divisible by 4 but not by 100 then it is a leap year.

Logic for not a Leap Year:
If the given value is not divisible by 4 then it is not a leap year
If the given value is divisible by 4 and 100 but not divisible by 400 then it is not a leap year.

For example,

1221 is not a leap year.
2000 is a leap year.
1890 is not a leap year.

Java Program to Check Leap Year

In this program we will check condition for Leap year or not. We would first declared and initialized the required variables. Next, we would prompt user to input the value for Year. Later we will find entered year is leap year or not.

import java.util.Scanner;
public class LeapYear 
{
 public static void main(String[] args) 
 {
    int year ;
    boolean flag = false;  // declaring avriables
    Scanner s = new Scanner(System.in);
    System.out.print("Enter any Year ");
    year = s.nextInt(); // taking value form user

    // if year is divided by 4
    if (year % 4 == 0) {
      
      if (year % 100 == 0) 
     {
        // if year is divided by 400
        // then it is a leap year
        if (year % 400 == 0)
          flag = true;
        else
          flag = false;
      }
      // if the year is not century year
      else
        flag = true;
    }
    else
      flag = false;
    if (flag)
      System.out.println(year + " is a leap year.");
    else
      System.out.println(year + " is not a leap year.");
  }
}

import java.util.Scanner;

public class LeapYear

{

public static void main(String[] args)

{

int year ;

boolean flag = false; // declaring avriables

Scanner s = new Scanner(System.in);

System.out.print("Enter any Year ");

year = s.nextInt(); // taking value form user

// if year is divided by 4

if (year % 4 == 0) {

if (year % 100 == 0)

{

// if year is divided by 400

// then it is a leap year

if (year % 400 == 0)

flag = true;

else

flag = false;

}

// if the year is not century year

else

flag = true;

}

else

flag = false;

if (flag)

System.out.println(year + " is a leap year.");

else

System.out.println(year + " is not a leap year.");

}

Output

Leap Year.

Not a Leap Year.

In our program, we have first declared and initialized a set variables required in the program.

year =taking year value from user.
Flag= for holding true false value.

First of all we declare variable and take a value from user to check whether a year is leap or not is

then we check if the given value is completely divisible by 4, 100 and 400 then it is a leap year.

If the given value is divisible by 4 but not by 100 then it is a leap year. As shown in above .So this the logic behind of finding given year is a leap year or not.if value of flag is true then year is leap year

and is false than the given year is not.

Java Program to Find all Roots of a Quadratic Equation

In this tutorial, we will learn to create a Java program that will Find all Roots of a Quadratic Equation using Java programming.

Prerequisites

Before starting with this tutorial, we assume that you are the best aware of the following Java programming topics:

Operators in java programming.
Basic input/output in java programming.
Basic in java programming.
Inbuilt library functions in java programming.

What is a Quadratic Equation?

In particular, it is a second-degree polynomial equation, since it has the greatest power is two.In algebra said a quadratic polynomial, a polynomial of degree 2.

Java Program to Find All Roots of a Quadratic Equation

In this program, we will Find All Roots of a Quadratic Equation. First of all we declare and initialize the required variables. Next, we would prompt the user to input the values of a,b, and c then with the help of sqrt() function we will calculate the first and second root or equations.

public class QuadRootPro {

  public static void main(String[] args) {

    // value a, b, and c
    double a = 2.3, b = 4, c = 5.6;
    double root1, root2;

    // calculate the determinant (b2 - 4ac)
    double determinant = b * b - 4 * a * c;

    // check if determinant is greater than 0
    if (determinant > 0) {

      // two real and distinct roots
      root1 = (-b + Math.sqrt(determinant)) / (2 * a);
      root2 = (-b - Math.sqrt(determinant)) / (2 * a);

      System.out.format("root1 = %.2f and root2 = %.2f", root1, root2);
    }

    // check if determinant is equal to 0
    else if (determinant == 0) {

      // two real and equal roots
      // determinant is equal to 0
      // so -b + 0 == -b
      root1 = root2 = -b / (2 * a);
      System.out.format("root1 = root2 = %.2f;", root1);
    }

    // if determinant is less than zero
    else {

      // roots are complex number and distinct
      double real = -b / (2 * a);
      double imaginary = Math.sqrt(-determinant) / (2 * a);
      System.out.format("root1 = %.2f+%.2fi", real, imaginary);
      System.out.format("\nroot2 = %.2f-%.2fi", real, imaginary);
    }
  }
}

public class QuadRootPro {

public static void main(String[] args) {

// value a, b, and c

double a = 2.3, b = 4, c = 5.6;

double root1, root2;

// calculate the determinant (b2 - 4ac)

double determinant = b * b - 4 * a * c;

// check if determinant is greater than 0

if (determinant > 0) {

// two real and distinct roots

root1 = (-b + Math.sqrt(determinant)) / (2 * a);

root2 = (-b - Math.sqrt(determinant)) / (2 * a);

System.out.format("root1 = %.2f and root2 = %.2f", root1, root2);

}

// check if determinant is equal to 0

else if (determinant == 0) {

// two real and equal roots

// determinant is equal to 0

// so -b + 0 == -b

root1 = root2 = -b / (2 * a);

System.out.format("root1 = root2 = %.2f;", root1);

}

// if determinant is less than zero

else {

// roots are complex number and distinct

double real = -b / (2 * a);

double imaginary = Math.sqrt(-determinant) / (2 * a);

System.out.format("root1 = %.2f+%.2fi", real, imaginary);

System.out.format("\nroot2 = %.2f-%.2fi", real, imaginary);

}

Output

In the above program, we have first declared and initialized a set variables required in the program.

a,b,c = for holding coordinates
root1= shows first root.
root2= shows the second root.

In this program first of we prompted user to input values of a,b and c

after getting the values of a,b and c and with the help of inbuilt function sqrt() and mathematical formula we know to calculate all Roots of a Quadratic Equation.

whose value define in math.h header file we going to find the Second Order Quadratic Equation.

As we know the formula of Quadratic Equation. we will use formula to get first and second root of given coordinates using Java program.

Java Program to Find the Largest Among Three Numbers

In this tutorial, we will learn to create a Java program that will find largest among three numbers using Java programming.

Prerequisites

Before starting with this tutorial we assume that you are best aware of the following Java programming topics:

Java Operators.
Basic Input and Output
Class and Object.
Basic Java programming.
If-else Statements.

In Our Program, we going to learn how to creating a program that find the largest element between three numbers. Using nested if-else Statement.

Java Program to Find the Largest Among Three Numbers

In this program we will find Largest among three .We would first declared and initialized the required variables. Next, we would prompt user to input three different values. Later we will find largest among them.

import java.util.Scanner;

public class Largest
{
    public static void main(String[] args) 
    {
        int a, b, c; // Decalring variables 

        Scanner sc = new Scanner(System.in);  // Taking value from user..  
        System.out.print("Enter the first number:");  
        a = sc.nextInt();  
        System.out.print("Enter the second number:");  
        b = sc.nextInt();  
        System.out.print("Enter the third number:");  
        c = sc.nextInt();    // taking values fr

        if( a >= b && a >= c) // Condition for grater
            System.out.println(a + " is the largest number.");
        else if (b >= a && b >= c)
            System.out.println(b + " is the largest number.");
        else if(c>a && c>b)
            System.out.println(c + " is the largest number.");
        else
            System.out.println("they either equal or zero.");
    }
}

import java.util.Scanner;

public class Largest

{

public static void main(String[] args)

{

int a, b, c; // Decalring variables

Scanner sc = new Scanner(System.in); // Taking value from user..

System.out.print("Enter the first number:");

a = sc.nextInt();

System.out.print("Enter the second number:");

b = sc.nextInt();

System.out.print("Enter the third number:");

c = sc.nextInt(); // taking values fr

if( a >= b && a >= c) // Condition for grater

System.out.println(a + " is the largest number.");

else if (b >= a && b >= c)

System.out.println(b + " is the largest number.");

else if(c>a && c>b)

System.out.println(c + " is the largest number.");

else

System.out.println("they either equal or zero.");

}

Output

In the above program, we have first declared and initialized a set variables required in the program.

a = it will hold First value.
b= it will hold second value.
c= it will hold third value.

And in the next statement user will be prompted to enter different values and which will be assigned to variables a,b and c respectively.

Now we will check condition for greatest among three ,

If the above condition returns true value than the value in first variable is greatest among all the values.if it returns false value we will check second condition for second variables

this statement give true means second has the greatest among all value them and if gives false value we will move to next statement where we check the reaming third variable to other two if it give true i.e the value in third is greatest

else provided values is either equal of false.

Java Program to Check Whether an Alphabet is Vowel or Consonant

In this tutorial, we will learn to create a Java program that check whether the entered alphabet by the user is a vowel or a consonant using Java programming.

Prerequisites

Before starting with this tutorial, we assume that you are the best aware of the following Java programming topics:

Operators in Java programming.
Condition statement in Java programming.
Logical operator in Java programming.
Basic input/output in Java programming.
Basic in Java programming.

What Is Vowel and consonant?

Vowel :=> Sound that allowing breath to flow out of mouth, without closing any part of the mouth is called as vowel.
Consonant:=> Sound made by blocking air from flowing out of the mouth with the teeth or throat is called as Consonant.

Example

As we know A E I O U are called vowels. And renaming alphabets except these 5 vowels are called consonants.

Program to Check the given value is Vowel or consonant.

So here we creating a program in which we will find the given character is vowel or consonant.
As we know a,e,i,o,u are only vowel and rest are consonant.So simply we will check these and if given character belongs to them then it is a vowel and if not its consonant simple isn’t it .let’s have a look at program.

import java.util.*;
class Char
{
    //Body of the main function of the program.
	public static void main(String[ ] arg)
	{
	//Declaring the required variables for the program.
	int i=0;
	char ch;
	//Creating the object of Scanner class
	Scanner sc=new Scanner(System.in);
	//Taking the input from the user for the program
	System.out.println("Enter a character : ");
	ch=sc.next( ).charAt(0);	
	//char ch=sc.nextChar();
	//Checking the character for the program 
	switch(ch)
	{
	 case  'a' :
	 case 'e'  :
	 case 'i'   :
	 case 'o'  :
	 case 'u'  :
	 case  'A' :
	 case 'E'  :
	 case 'I'   :
	 case 'O'  :
	 case 'U'  :i++;
	}
	//If i value == 1; Then its a Vowel.
	if(i==1)
	//Printiong the character is a vowel
	System.out.println("Entered character "+ch+" is  Vowel");
	else 
		if((ch>='a'&&ch<='z')||(ch>='A'&&ch<='Z'))
		//Printiong the character is a consonent.
		System.out.println("Entered character "+ch+" is Consonent");
		else
		//Its not a valid alphabet
		System.out.println("Not an alphabet");		
	}
}

import java.util.*;

class Char

{

//Body of the main function of the program.

public static void main(String[ ] arg)

{

//Declaring the required variables for the program.

int i=0;

char ch;

//Creating the object of Scanner class

Scanner sc=new Scanner(System.in);

//Taking the input from the user for the program

System.out.println("Enter a character : ");

ch=sc.next( ).charAt(0);

//char ch=sc.nextChar();

//Checking the character for the program

switch(ch)

{

case 'a' :

case 'e' :

case 'i' :

case 'o' :

case 'u' :

case 'A' :

case 'E' :

case 'I' :

case 'O' :

case 'U' :i++;

}

//If i value == 1; Then its a Vowel.

if(i==1)

//Printiong the character is a vowel

System.out.println("Entered character "+ch+" is Vowel");

else

if((ch>='a'&&ch<='z')||(ch>='A'&&ch<='Z'))

//Printiong the character is a consonent.

System.out.println("Entered character "+ch+" is Consonent");

else

//Its not a valid alphabet

System.out.println("Not an alphabet");

}

Output

Note: Here we assumes that the user will enter an alphabet. If not so then non-alphabetic character, it displays the character is neither a vowel nor a consonant.

In the above program, we have first declared a variables required in the program.

ch= hold given character.

First of all user prompted to enter any character which will be assign in ch variable.

Then with the help of if-else statement we will check the inputted character is a vowel or consonant, using following logic

As user inputs any character we will check whether it’s a vowel both in lower-case and upper-case condition we check if belongs to in vowel or consonant. if it is vowel we will show following message.If a character doesn’t belong to this condition then it is consonant ,

and if doesn’t meet any of them vowel and consonant it might be a digit or a special symbol.

So in this tutorial we have learn to find given character is vowel or consonant.

Java Program to Generate Multiplication Table

In this tutorial, we will learn to create a Java program that will generate a Multiplication Table using Java programming.

Prerequisites

Before starting with this tutorial, we assume that you are the best aware of the following Java programming topics:

Operators in Java Programming.
Basic Input and Output function in Java Programming.
Basic Java programming.
Conditional Statements in Java programming.
Arithmetic operations in Java Programming.

Program that will generate the multiplication table:-

In today’s program, we will take input in number format. Secondly, we will generate a Multiplication Table with the help of a small program. The numbers are the most useful terminology in any programming language. For number/arithmetic manipulation in Java programming, there are many predefined functions available.

With the help of this program, we can take input and will Generate the Multiplication Table.

Algorithm:-

1. Declaring the variables for the program.

2. Taking the input numbers from the user in number format.

3. Generating the table and storing it in a variable.

4. End program.

1. Declaring the variables for the program.

2. Taking the input numbers from the user in number format.

3. Generating the table and storing it in a variable.

4. End program.

Program:-

import java.util.Scanner;  //Importing the scanner class through the package
public class TBL//Main class of the program.
{  
//Main function of the program.
public static void main(String args[])   
{ 
//Declaring the variables for the program.
int i,no;
//Taking the input number from the user.
Scanner sc = new Scanner(System.in);  
System.out.print("Enter number: ");       
//reading a number whose table is to be print  
 no =sc.nextInt();  
//loop start execution form and execute until the condition i<=10 becomes false  
//Generating the table from 1 to 10
for( i=1; i <= 10; i++)  
{  
//prints table of the entered number      
System.out.println(no +" * "+i+" = "+ no*i);  
}  
}  
}

import java.util.Scanner; //Importing the scanner class through the package

public class TBL//Main class of the program.

{

//Main function of the program.

public static void main(String args[])

{

//Declaring the variables for the program.

int i,no;

//Taking the input number from the user.

Scanner sc = new Scanner(System.in);

System.out.print("Enter number: ");

//reading a number whose table is to be print

no =sc.nextInt();

//loop start execution form and execute until the condition i<=10 becomes false

//Generating the table from 1 to 10

for( i=1; i <= 10; i++)

{

//prints table of the entered number

System.out.println(no +" * "+i+" = "+ no*i);

}

Output:-

In the above program, we have first initialized the required variable.

no = it will hold the input number value from the user.
i = it will hold the integer value.

Taking input numbers from the user.

Calculating the table of given numbers using a for loop.