ADITYA

Welcome to the world of copycats

Learning without practice is of no use. Brain has a nature of adapting solutions by experiencing them andnot just by Copy them.

Java Practicals

Select Practical :

Practical : 1

AIM :

Write a Program that displays Welcome to Java, Learning Java Now and Programming is fun.

public class PR_1{
	public static void main(String[] args) {
		System.out.println("Welcome To Java, Lerning Java Now and Progrmaing is fun");
		}
}

Practical : 2

AIM :

Write a program that solves the following equation and displays the value x and y:
1) 3.4x+50.2y=44.5
2) 2.1x+.55y=5.9
(Assume Cramer’s rule to solve equation ax+by=e x=ed-bf/ad-bc cx+dy=f y=af-ec/ad-bc )

public class PR_2 {

	public static void main(String[] args){
		double a=3.4,b=50.2,c=2.1,d=0.55,e=44.5,f=5.9;
		double x = (e*d-b*f)/(a*d-b*c);
		double y = (a*f-e*c)/(a*d-b*c);


		System.out.println("x = "+x+"y = "+y);

	}
}

Practical : 3

AIM :

Write a program that reads a number in meters, converts it to feet, and displays the result. 

import java.util.Scanner;
public class PR_3 {
	public static void main(String[] args){
		Scanner input = new Scanner(System.in);

		System.out.print("Enter Number in Meter: ");
		double m = input.nextDouble();
		double f=m*3.2808;
		System.out.println("Result in feet: "+f);

	}
}

Practical : 4

AIM :

Body Mass Index (BMI) is a measure of health on weight. It can be calculated by taking your weight in kilograms and dividing by the square of your height in meters. Write a program that prompts the user to enter a weight in pounds and height in inches and displays the BMI.
Note:- 1 pound=.45359237 Kg and 1 inch=.0254 meters. 

import java.util.Scanner;
public class PR_4 {

	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);

		System.out.print("Enter Your Weight in pound : ");
		float w = sc.nextFloat();

		System.out.print("Enter Your Height in Inch : ");
		float h = sc.nextFloat();

		double BMI = (w*0.4535) / ((h*0.0254)*(h*0.0254));

		System.out.println("Your BMI is: "+BMI);

	}
}

Practical : 5

AIM :

Write a program that prompts the user to enter three integers and display the integers in decreasing order.

import java.util.Scanner;
public class PR_5 {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);

		System.out.println("Enter three Number: ");
		int x = sc.nextInt();
		int y = sc.nextInt();
		int z = sc.nextInt();
		int temp;


		if(x<y){
			temp = x;
			x = y;
			y = temp;
		}
		if(z>y){
			if(z>x){
				temp = z;
				z = y;
				y = x;
				x = temp;
			}
			else{
				temp = z;
				z = y;
				y = temp;
			}
		}
		System.out.println("Number in Desending Order: \n"+x+"\n"+y+"\n"+z);

	}
}

Practical : 6

AIM :

Write a program that prompts the user to enter a letter and check whether a letter is a vowel or constant.

import java.util.Scanner;
public class PR_6 {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);

		System.out.println("Enter a char to check vowel : ");
		char c = sc.next().charAt(0);

		switch(Character.toLowerCase(c)){
			case 'a':
			case 'e':
			case 'i':
			case 'o':
			case 'u':
					System.out.println( c+ " is vowel char.");
					break;
			default:
					System.out.println( c+" is not a vowel char.");
		}

	}
}

Practical : 7

AIM :

Assume a vehicle plate number consists of three uppercase letters followed by four digits. Write a program to generate a plate number.

public class PR_7 {

	public static void main(String[] args){

		int a1 = 'A' + (int) (Math.random() * ('Z' - 'A'));
		int a2 = 'A' + (int) (Math.random() * ('Z' - 'A'));
		int a3 = 'A' + (int) (Math.random() * ('Z' - 'A'));

		int dig1 = (int) (Math.random() * 10);
		int dig2 = (int) (Math.random() * 10);
		int dig3 = (int) (Math.random() * 10);
		int dig4 = (int) (Math.random() * 10);

		System.out.println("" + (char) (a1) + ((char) (a2)) + ((char) (a3)) + dig1 + dig2 + dig3 + dig4);
	}
}

Practical : 8

AIM :

Write a program that reads an integer and displays all its smallest factors in increasing order. For example if input number is 120, the output should be as follows:2,2,2,3,5.

import java.util.Scanner;
public class PR_8 {

	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);

		int div = 2;

		System.out.println("Enter a Number : ");
		int number = sc.nextInt();

		while(number > 1){
			if(number % div == 0){
				System.out.print(div+",");
				number = number / div;
			}else{
				div++;
			}
		}
	}
}

Practical : 9

AIM :

Write a method with following method header. public static int gcd(int num1, int num2) Write a program that prompts the user to enter two integers and compute the gcd of two integers.

import java.util.Scanner;

public class PR_9 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		System.out.println("Enter First Number: ");
		int num1 = sc.nextInt();

		System.out.println("Enter Second Number: ");
		int num2 = sc.nextInt();

		System.out.println("GCD of "+num1+" and "+num2+" is "+gcd(num1,num2));
	}
	public static int gcd(int num1,int num2){
		while(num1 != num2){
			if(num1>num2){
				num1 = num1 - num2;
			}
			else{
				num2 = num2 - num1;
			}
		}
		return num1;
	}
}

Practical : 10

AIM :

Write a test program that prompts the user to enter ten numbers, invoke a method to reverse the numbers, display the numbers.

import java.util.Scanner;

public class PR_10 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		int i=0;
		int num_arr[] = new int[10];
		for(i=0;i<10;i++){
			System.out.print("Number at Position "+(i+1)+" :");
			num_arr[i]=sc.nextInt();
		}
		reversenum(num_arr);
		for(i=0;i<10;i++){
			System.out.println("Value at Position "+(i+1)+":"+num_arr[i]);

		}
	}
	public static void reversenum(int arr[]) {
		int j=0,temp;
		while(j<=arr.length/2){
			temp = arr[j];
			arr[j] = arr[arr.length-1-j];
			arr[arr.length-1-j] = temp;
			j++;
		}

	}
}

Practical : 12_1

AIM :

Write a program that creates a Random object with seed 1000 and displays the first 100 random integers between 1 and 49 using the NextInt (49) method.

import java.util.Random;
public class PR_12_A {
    public static void main(String[] args) {
        Random random = new Random(1000);

        for(int i = 0; i<100; i++){
            System.out.format("%3s",random.nextInt(49));
            if((i+1)%20==0){
                System.out.println();
            }

        }
    }
}

Practical : 12_2

AIM :

Write a program to create circle class with area function to find area of circle.

public class PR_12_B {
    public static void main(String[] args) {
        double r=2;
        System.out.println(area(r));

    }
    public static double area(Double r){
        double pi = 3.14;
        return pi*r*r;

    }
}

Practical : 12_3

AIM :

Write a Program using Constructor overloading in JAVA

public class PR_12_C {
    public static void main(String[] args) {

       // this parameter for circle area
        double r=2;
        System.out.println(area(r));

        // this parameter fot ractengle area
        double l=10,b=32.4;
        System.out.println(area(l,b));
    }

    public static double area(double l,double b){
        return l*b;
    }

    public static double area(Double r){
        double pi = 3.14;
        return pi*r*r;

    }
}

Practical : 13

AIM :

Write a program for calculator to accept an expression as a string in which the operands and operator are separated by zero or more spaces. For ex: 3+4 and 3 + 4 are acceptable expressions.

import java.util.Scanner;

public class PR_13 {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);

        System.out.println("Enter any String");
        String s = sc.nextLine();
        String p = s.replaceAll(" ", "");

        System.out.println("After removing space:- "+p);
    }
}

Practical : 14

AIM :

Write a program that creates an Array List and adds a Loan object , a Date object , a string, and a Circle object to the list, and use a loop to display all elements in the list by invoking the object’s to String() method.

import java.util.ArrayList;
import java.util.Date;

public class PR_14 {
    public static void main(String[] args) {
      ArrayList<Object> arr = new ArrayList<Object>();
        arr.add(new Lone(120000));
        arr.add(new Date());
        arr.add(new Circle(7.5));
        arr.add(new String("My name is Aditya"));

        for (int i = 0; i < arr.size(); i++) {
            System.out.println((arr.get(i)).toString());
        }

    }
}

class Circle {
    double diameter;

    Circle(double r) {
        this.diameter = r * 2;
    }

    public String toString() {
        return "Circle Diameter is:- " + this.diameter;
    }
}

class Lone{
    double intrest = 6.4, t;

    Lone(double amount) {
        this.t = (amount * intrest * 12) / (100*12);
        this.t = t+amount;
    }

    public String toString() {
        return "Total amount you pay:- " + this.t;
    }
}

Practical : 11

AIM :

Write a program that generate 6*6 two-dimensional matrix, filled with 0’s and 1’s , display the matrix, check every raw and column have an odd number’s of 1’s.

import java.util.Scanner;
class PR_11
{
    public static int[][] create_fill_matrix()
    {
        int [][]matrix = new int[6][6];
        for(int i=0;i<6;i++)
        {
            for(int j=0;j<6;j++)
            {
                matrix[i][j]=(int)((Math.random()*5)%2);
            }
        }
        return matrix;
    }
    public static void displayMatrix(int [][]matrix)
    {
        System.out.print("\nMatrix Values \n");
        for(int i=0;i<6;i++)
        {
            for(int j=0;j<6;j++)
            {
                System.out.print(matrix[i][j]+ " ");
            }
            System.out.println();
        }
    }
    public static void main(String[] args)
    {
        int my_matrix[][];
        int i,j,cnt;
        my_matrix=create_fill_matrix();
        displayMatrix(my_matrix);
        System.out.println("\nRows Having ODD no of 1s");
        for(i=0;i<6;i++)
        {
            cnt=0;
            for(j=0;j<6;j++)
            {
                if(my_matrix[i][j]==1)
                {
                    cnt++;
                }
            }
            if(cnt%2!=0)
            {
                System.out.println("Row - "+(i+1)+" have ODD no of 1s");
            }
        }
        System.out.println("\nColumns Having ODD no of 1s");
        for(i=0;i<6;i++)
        {
            cnt=0;
            for(j=0;j<6;j++)
            {
                if(my_matrix[j][i]==1)
                {
                    cnt++;
                }
            }
            if(cnt%2!=0)
            {
                System.out.println("Column - "+(i+1)+" " +
                        "have ODD no of 1s");
            }
        }
    }
}

Practical : 21

AIM :

Write a program to create a file name 123.txt, if it does not exist. Append a new data to it if it already exist. write 150 integers created randomly into the file using Text I/O. Integers are separated by space.

import java.io.*;
import java.util.Scanner;

class PR_21
{
    public static void main(String[] args)
    {
        try (
                PrintWriter pw = new PrintWriter(new FileOutputStream(new File("123.txt"), true));
        )
        {
            for (int i = 0; i < 150; i++)
            {
                pw.print((int)(Math.random() * 150) + " ");
            }
        }
        catch (FileNotFoundException fnfe)
        {
            System.out.println("Cannot create the file.");
            fnfe.printStackTrace();
        }
    }
}

Practical : 19

AIM :

Write a program that displays the color of a circle as red when the mouse button is pressed and as blue when the mouse button is released.

package Practical;

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.StackPane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.stage.Stage;

public class Practical_19  extends Application{

    @Override
    public void start(Stage primaryStage) {
        double width = 400;
        double height = 400;
        Circle c = new Circle(width / 2, height / 2, Math.min(width, height) / 10, Color.WHITE);

        c.setStroke(Color.BLACK);

        StackPane pane = new StackPane(c);

        primaryStage.setScene(new Scene(pane, width, height));
        pane.setOnMousePressed(e -> c.setFill(Color.RED));
        pane.setOnMouseReleased(e -> c.setFill(Color.BLUE));
        primaryStage.setTitle("Click circle..");
        primaryStage.show();
    }
    public static void main(String[] args) {
        Application.launch(args);

    }
}

Practical : 20

AIM :

Write a GUI program that use button to move the message to the left and right and use the radio button to change the color for the message displaye.

package Practical;

import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.control.Button;
import javafx.scene.control.CheckBox;
import javafx.scene.control.RadioButton;
import javafx.scene.control.ToggleGroup;
import javafx.scene.image.ImageView;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.Pane;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.scene.text.Font;
import javafx.scene.text.FontPosture;
import javafx.scene.text.FontWeight;

public class Practical_20 extends CheckBoxDemo {
  @Override // Override the getPane() method in the super class
  protected BorderPane getPane() {

	  BorderPane pane = super.getPane();

	  HBox paneForButtons = new HBox(20);
	    Button btLeft = new Button("Left",
	      new ImageView("left.png"));
	    Button btRight = new Button("Right",
	      new ImageView("right.png"));
	    paneForButtons.getChildren().addAll(btLeft, btRight);
	    paneForButtons.setAlignment(Pos.CENTER);
	    paneForButtons.setStyle("-fx-border-color: green");

	    BorderPane pane1 = new BorderPane();
	    pane.setBottom(paneForButtons);

	    Pane paneForText = new Pane();
	    paneForText.getChildren().add(text);
	    pane.setCenter(paneForText);

	    btLeft.setOnAction(e -> text.setX(text.getX() - 10));
	    btRight.setOnAction(e -> text.setX(text.getX() + 10));

	    Font fontBoldItalic = Font.font("Times New Roman",
	      FontWeight.BOLD, FontPosture.ITALIC, 20);
	    Font fontBold = Font.font("Times New Roman",
	      FontWeight.BOLD, FontPosture.REGULAR, 20);
	    Font fontItalic = Font.font("Times New Roman",
	      FontWeight.NORMAL, FontPosture.ITALIC, 20);
	    Font fontNormal = Font.font("Times New Roman",
	      FontWeight.NORMAL, FontPosture.REGULAR, 20);

	    text.setFont(fontNormal);

	    VBox paneForCheckBoxes = new VBox(20);
	    paneForCheckBoxes.setPadding(new Insets(5, 5, 5, 5));
	    paneForCheckBoxes.setStyle("-fx-border-color: green");
	    CheckBox chkBold = new CheckBox("Bold");
	    CheckBox chkItalic = new CheckBox("Italic");
	    paneForCheckBoxes.getChildren().addAll(chkBold, chkItalic);
	    pane.setRight(paneForCheckBoxes);

	    EventHandler handler = e -> {
	      if (chkBold.isSelected() && chkItalic.isSelected()) {
	        text.setFont(fontBoldItalic); // Both check boxes checked
	      }
	      else if (chkBold.isSelected()) {
	        text.setFont(fontBold); // The Bold check box checked
	      }
	      else if (chkItalic.isSelected()) {
	        text.setFont(fontItalic); // The Italic check box checked
	      }
	      else {
	        text.setFont(fontNormal); // Both check boxes unchecked
	      }
	    };

	    chkBold.setOnAction(handler);
	    chkItalic.setOnAction(handler);


    VBox paneForRadioButtons = new VBox(20);
    paneForRadioButtons.setPadding(new Insets(5, 5, 5, 5));
    paneForRadioButtons.setStyle
      ("-fx-border-width: 2px; -fx-border-color: green");

    RadioButton rbRed = new RadioButton("Red");
    RadioButton rbGreen = new RadioButton("Green");
    RadioButton rbBlue = new RadioButton("Blue");
    paneForRadioButtons.getChildren().addAll(rbRed, rbGreen, rbBlue);
    pane.setLeft(paneForRadioButtons);

    ToggleGroup group = new ToggleGroup();
    rbRed.setToggleGroup(group);
    rbGreen.setToggleGroup(group);
    rbBlue.setToggleGroup(group);

    rbRed.setOnAction(e -> {
      if (rbRed.isSelected()) {
        text.setFill(Color.RED);
      }
    });

    rbGreen.setOnAction(e -> {
      if (rbGreen.isSelected()) {
        text.setFill(Color.GREEN);
      }
    });

    rbBlue.setOnAction(e -> {
      if (rbBlue.isSelected()) {
        text.setFill(Color.BLUE);
      }
    });

    return pane;
  }

  /**
   * The main method is only needed for the IDE with limited
   * JavaFX support. Not needed for running from the command line.
   */
  public static void main(String[] args) {
    launch(args);
  }
}

Practical : 22

AIM :

Write a recursive method that returns the smallest integer in an array. Write a test program that prompts the user to enter an integer and display its product.

package Practical;
//Recursive Java program to find minimum
import java.util.*;

class Practical_22{

	// function to return minimum element using recursion
	public static int findMinRec(int A[], int n)
	{
	// if size = 0 means whole array
	// has been traversed
	if(n == 1)
		return A[0];

		return Math.min(A[n-1], findMinRec(A, n-1));
	}

	// Driver code
	public static void main(String args[])
	{
		int A[] = {1, 4, 45, 6, -50, 10, 2};
		int n = A.length;

		// Function calling
		System.out.println(findMinRec(A, n));
	}
}

Practical : 14

AIM :

Write a program to create a file name 123.txt, if it does not exist. Append a new data to it if it already exist. write 150 integers created randomly into the file using Text I/O. Integers are separated by space.

Operating System Practicals

Select Practical :

Practical : 2

AIM :

Write a shell script to generate marksheet of a student. Take 3 subjects, calculate and display total marks, percentage and Class obtained by the student.

#!/bin/bash
echo "***********************"
echo "Marksheet for Student"
echo "***********************"
echo "Enter Marks of three subject"
echo "Physics"
read ph
echo "Chemistry"
read ch
echo "Maths"
read mt
sum1=`expr $ph + $ch + $mt`
echo "Sum of three subject is:"$sum1
per=`expr $sum1 / 3`
echo "Percentage:"$per
if [ $per -ge 60 ]
then
        echo "You get Distinction"
elif [ $per -ge 50 ]
then
        echo "You get First class"
elif [ $per -ge 40 ]
then
        echo "You get Second class"
else
        echo "You get Fail"
fi

Practical : 3

AIM :

Write a shell script to display multiplication table of given number 

clear
echo "which number to generate multiplication table"
read number
i=1
while [ $i -le 10 ]
do
echo " $number * $i =`expr $number \* $i ` "
i=`expr $i + 1`
done

Practical : 4

AIM :

Write a shell script to find factorial of given number n. 

#!/bin/bash
echo "Enter a number"
read num

fact=1

while [ $num -gt 1 ]
do
  fact=$((fact * num))  #fact = fact * num
  num=$((num - 1))      #num = num - 1
done

echo "Result:" $fact

Practical : 5

AIM :

Write a shell script which will accept a number b and display first n prime numbers as output. 

#!/bin/bash

echo "enter the Last Number"
read n
echo "the prime no are:"
m=2
while [ $m -le $n ]
do
i=2
flag=0
while [ $i -le `expr $m / 2` ]
do
if [ `expr $m % $i` -eq 0 ]
then
flag=1
break
fi
i=`expr $i + 1`
done
if [ $flag -eq 0 ]
then
echo $m
fi
m=`expr $m + 1`
done

Practical : 6

AIM :

Write a shell script which will generate first n fibonnacci numbers like: 1, 1, 2, 3, 5, 13, ... 

#!/bin/bash

clear
echo "How many number of terms to be generated ?"
read n
x=0
y=1
i=2
echo "Fibonacci Series up to $n terms :"
echo "$x"
echo "$y"
while [ $i -lt $n ]
do
i=`expr $i + 1 `
z=`expr $x + $y `
echo "$z"
x=$y
y=$z
don

Practical : 7

AIM :

Write a menu driven shell script which will print the following menu and execute the given task.
a. Display calendar of current month
b. Display today’s date and time
c. Display usernames those are currently logged in the system
d. Display your name at given x, y position
e. Display your terminal numberbr 

#!/bin/bash

echo "1. Today date and time"
echo "2. Total login user"
echo "3. User Name"
echo "4. Terminal No."
echo "5. Exit"
echo "Enter your choice"
read i
case $i in
1)
cal ;;
2)
date ;;
3)
whoami ;;
4)
tput cup 10 10
echo ADITYA ;;
5)
tty ;;
6)
exit ;;
*) echo "Enter Valid Input" ;;
esac

Practical : 8

AIM :

Write a shell script to read n numbers as command arguments and sort them in descending order. 

#!/bin/bash
if [ $# -eq 0 ]
then
        echo "Enter valid Arguments"
        exit
fi

> temp_file

for i in $*
do
        echo "$i" >> temp_file
done

echo "Your sorted data:"
sort -nr temp_file

Practical : 9

AIM :

Write a shell script to display all executable files, directories and zero sized files from current directory. 

#!/bin/bash
                        for File in *
                        do
                        if [ -r $File -a -w $File -a -x $File ]
                        then
                        echo $File
                        fi
                        done

Practical : 10

AIM :

Write a shell script to check entered string is palindrome or not. 

#!/bin/bash
                        clear
                        if [ $# -eq 0 ]
                        then
                        echo "Enter the string:"
                        read a
                        else
                        a=$*
                        fi
                        b=`expr $a | wc -c`
                        b=`expr $b - 1`
                        echo number of letter=$b
                        while [ $b -gt 0 ]
                        do
                        	e=`expr $a | cut -c $b`
                            d=$d$e
                            b=`expr $b - 1`
                        done
                        echo "The reversed string is :"$d
if [ $a = $d ]
                        then
                        	echo "String is a palindrome"
                        else
                        	echo "String is not a palindrome"
                        fi

Practical : 11

AIM :

Shell programming using filters (including grep,egrep,fgrep). 

echo "Main Menu"
echo "Press 1 for using Grep Command"
echo "Press 2 for using Egrep Command"
echo "Press 3 for using Fgrep Command"
read a

case $a in
                1) echo "For single pattern search, Enter Pattern below :"
                   read b
                   grep "$b" City_names.txt
                   ;;
                2) echo "For double Pattern search, Enter b,c pattern :"
                   read b
                   read c
                   egrep "$b" City_names.txt
                   grep -E "$c" City_names.txt
                   ;;
                3) echo "For Pattern From a File, Enter Pattern :"
                   read b
                   grep -F "$b" City_names.txt
                   ;;

esac

Practical : 13

AIM :

Write a shell script to validate the entered date. (e.g. Date format is : dd-mm-yyyy).

echo "Enter Valid Date"
read date
echo "You have entered $date"
date -d $date

if [ $? -eq 0 ]
then
 						       echo "Enter Date is Valid"
else
 						       echo "Enter Date is Invalid"
fi

Practical : 14

AIM :

Write a awk program using function, which convert each word in a given text into capital. 

echo "Enter the String"
a=$(awk 'BEGIN{
	getline str;
	print toupper(str);
	}')
echo $a

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