Write a program to concatenate string using for Loop

Write a program to concatenate string using for Loop

By Unknown   16:05   No comments:

/*Example
:
Input - 5

Output - 1 2 3 4 5 */
class Join {

    public static void main(String args[]) {
        int num = Integer.parseInt(args[0]);
        String result = " ";
        for (int i = 1; i <= num; i++) {
            result = result + i + " ";
        }
        System.out.println(result);
    }
}

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Write a program to find SUM AND PRODUCT of a given Digit.

Write a program to find SUM AND PRODUCT of a given Digit.

By Unknown   12:28   No comments:

class Sum_Product_ofDigit {

    public static void main(String args[]) {
        int num = Integer.parseInt(args[0]);
//taking value as command line argument.
        int temp = num, result = 0;
//Logic for sum of digit
        while (temp > 0) {
            result = result + temp;
            temp--;
        }
        System.out.println("Sum of Digit for " + num + " is : " + result);
//Logic for product of digit
        temp = num;

        result = 1;
        while (temp > 0) {
            result = result * temp;
            temp--;
        }
        System.out.println("Product of Digit for " + num + " is : " + result);
    }
}

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Write a program to display a greet message according to Marks obtained by student

Write a program to display a greet message according to Marks obtained by student

By Unknown   17:10   No comments:

class SwitchDemo {

    public static void main(String args[]) {
        int marks = Integer.parseInt(args[0]); //take marks  as command line argument

        switch (marks / 10) {
            case 10:
            case 9:
            case 8:
                System.out.println("Excellent");
                break;
            case 7:
                System.out.println("Very Good");
                break;
            case 6:
                System.out.println("Good");
                break;
            case 5:
                System.out.println("Work Hard");
                break;
            case 4:
                System.out.println("Poor");
                break;
            case 3:
            case 2:
            case 1:
            case 0:
                System.out.println("Very Poor");
                break;
            default:
                System.out.println("Invalid value Entered");
        }
    }
}

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To Find Minimum of Two Numbers using conditional operator

To Find Minimum of Two Numbers using conditional operator

By Unknown   15:14   No comments:

/*
 To find minimum of 2 Numbers using ternary operator
 */

class Minoftwo {

    public static void main(String args[]) {
//taking value as command line argument.
//Converting String format to Integer value
        int i = Integer.parseInt(args[0]);
        int j = Integer.parseInt(args[1]);
        int result = (i < j) ? i : j;
        System.out.println(result + " is a minimum value");
    }
}

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To Find Maximum of Two Numbers.

To Find Maximum of Two Numbers.

By Unknown   15:12   No comments:

/*
 To Find Maximum of 2 Numbers using if else
 */

class Maxoftwo {

    public static void main(String args[]) {
//taking value as command line argument.
//Converting String format to Integer value
        int i = Integer.parseInt(args[0]);
        int j = Integer.parseInt(args[1]);
        if (i > j) {
            System.out.println(i + " is greater than " + j);
        } else {
            System.out.println(j + " is greater than " + i);
        }
    }
}

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pyramid of numbers using for loops

pyramid of numbers using for loops

By Unknown   14:27   No comments:

/*
 Generate Pyramid For a Given Number Example
 This Java example shows how to generate a pyramid of numbers for given
 number using for loop example.
 */

import java.io.BufferedReader;
import java.io.InputStreamReader;

public class GeneratePyramidExample {

    public static void main(String[] args) throws Exception {
        BufferedReader keyboard = new BufferedReader(new InputStreamReader(System.in));
        System.out.println("Enter Number:");
        int as = Integer.parseInt(keyboard.readLine());
        System.out.println("Enter X:");
        int x = Integer.parseInt(keyboard.readLine());
        int y = 0;
        for (int i = 0; i <= as; i++) {

            for (int j = 1; j <= i; j++) {
                System.out.print(y + "\t");
                y = y + x;
            }
            System.out.println("");
        }
    }
}
/*
 Output of this example would be
 Enter Number:
 5
 Enter X:
 1
 0
 1 2
 3 4 5
 6 7 8 9
 10 11 12 13 14
 ----------------------------------------------
 17
 Enter Number:
 5
 Enter X:
 2
 0
 2 4
 6 8 10
 12 14 16 18
 20 22 24 26 28
 ----------------------------------------------
 Enter Number:
 5
 Enter X:
 3
 0
 3 6
 9 12 15
 18 21 24 27
 30 33 36 39 42
 */

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Factorial of a number using recursion

Factorial of a number using recursion

By Unknown   14:25   No comments:

/*
 This program shows how to calculate
 Factorial of a number using recursion function.
 */

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class JavaFactorialUsingRecursion {

    public static void main(String args[]) throws NumberFormatException,
            IOException {
        System.out.println("Enter the number: ");
//get input from the user
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int a = Integer.parseInt(br.readLine());
//call the recursive function to generate factorial
        int result = fact(a);
        System.out.println("Factorial of the number is: " + result);
    }

    static int fact(int b) {
        if (b <= 1) //if the number is 1 then return 1
        {
            return 1;
        } else //else call the same function with the value - 1
        {
            return b * fact(b - 1);
        }
    }
}
/*
Output of this Java example would be
Enter the number:
5
Factorial of the number is: 120
*/

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Calculate Circle Area using radius

Calculate Circle Area using radius

By Unknown   12:29   No comments:

/*
 This program shows how to calculate
 area of circle using it's radius.
 */

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class CalculateCircleAreaExample {

    public static void main(String[] args) {
        int radius = 0;
        System.out.println("Please enter radius of a circle");
        try {
//get the radius from console
            BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
            radius = Integer.parseInt(br.readLine());
        } //if invalid value was entered
        catch (NumberFormatException ne) {
            System.out.println("Invalid radius value" + ne);
            System.exit(0);
        } catch (IOException ioe) {
            System.out.println("IO Error :" + ioe);
            System.exit(0);
        }
        /*
         * Area of a circle is
         * pi * r * r
         * where r is a radius of a circle.
         */
//NOTE : use Math.PI constant to get value of pi
        double area = Math.PI * radius * radius;
        System.out.println("Area of a circle is " + area);
    }
}
/*
Output of Calculate Circle Area using Java Example would be

Please enter radius of a circle
19
Area of a circle is 1134.1149479459152
*/

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Nested Switch

Nested Switch

By Unknown   10:07   No comments:

/*
Statements Example
This example shows how to use nested switch statements in a
java program.
*/

public class NestedSwitchExample {

    public static void main(String[] args) {
        /*
         * Like any other Java statements, switch statements
         * can also be nested in each other as given in
         * below example.
         */
        int i = 0;
        int j = 1;
        switch (i) {
            case 0:
                switch (j) {
                    case 0:
                        System.out.println("i is 0, j is 0");
                        break;
                    case 1:
                        System.out.println("i is 0, j is 1");
                        break;

                    default:
                        System.out.println("nested default case ! ");
                }
                break;
            default:
                System.out.println("No matching case found!!");
        }
    }
}
/*
Output would be,
i is 0, j is 1
*/

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Reversed pyramid using for loops & decrement operator.

Reversed pyramid using for loops & decrement operator.

By Unknown   09:53   No comments:

/*
Pyramid 5 Example
This Java Pyramid example shows how to generate pyramid or triangle
like given below using for loop.
12345
1234
123
12
1
*/
public class JavaPyramid5 {

    public static void main(String[] args) {
        for (int i = 5; i > 0; i--) {
            for (int j = 0; j < i; j++) {
                System.out.print(j + 1);
            }
            System.out.println("");
        }
    }
}
/*
Output of the example would be
12345
1234
123
12
1
*/

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