Design a screen in Java to handle the Mouse Events such as MOUSE_MOVED and MOUSE_CLICK and display the position of the Mouse_Click in a TextField.

 Slip 2Q2

Save as     "Slip2q2"

CODE:

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;


public class Slip2q2 {
    public static void main(String[] args) {
        new MyFrame("Mouse Events");
    }
}

class MyFrame extends JFrame {
    TextField click_text_field, mouse_move_field;
    Label click_text_label, mouse_move_label;
    int x,y;
    Panel panel;
    MyFrame(String title) {
        super(title);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLayout(new FlowLayout());

        panel =new Panel();
        panel.setLayout(new GridLayout(2,2,5,5));
        click_text_label = new Label("Co-ordinates of clicking");
        mouse_move_label = new Label("Co-ordinates of movement");
        click_text_field=new TextField(20);
        mouse_move_field =new TextField(20);
        panel.add(click_text_label);
        panel.add(click_text_field);
        panel.add(mouse_move_label);
        panel.add(mouse_move_field);
        add(panel);
        addMouseListener(new MyClick());
        addMouseMotionListener(new MyMove());
        setSize(500,500);
        setVisible(true);
    }
    class MyClick extends MouseAdapter {
        public void mouseClicked(MouseEvent me) {
            x=me.getX();
            y=me.getY();
            click_text_field.setText("X="+x+" Y="+y);
        }
    }
    class MyMove extends MouseMotionAdapter
    {
        public void mouseMoved(MouseEvent me)
        {
            x=me.getX();
            y=me.getY();
            mouse_move_field.setText("X="+ x +" Y="+y);
        }
    }
}

OUTPUT :

Write a ‘java’ program to copy only non-numeric data from one file to another file

 Slip 1 Q 2

Save as         "Slip1q2.java"

 

import java.io.*;

public class Slip1q2 {
    public static void main(String[] args) throws IOException {
        System.out.println("reading file...");
        FileReader fileReader = new FileReader("Slip1/src/sourcefile1q2.txt");
        // enter your source file location
        FileWriter fileWriter = new FileWriter("Slip1/src/destinationfile1Q2.txt");
        // enter your destination file location
        int data = fileReader.read();
        System.out.println("writing file...");
        while (data != -1){
            String content = String.valueOf((char)data);
            if(Character.isAlphabetic(data)) {
                fileWriter.append(content);
            }else if(content.equals(" ")){
                fileWriter.append(" ");
            }
            data = fileReader.read();
        }
        System.out.println("\nCOPY FINISHED SUCCESSFULLY...");
        fileWriter.close();
        fileReader.close();
    }
}

OUTPUT:

Source file content :

Code :

Destination File after code :

A) Write a java program to accept a number from a user, if it is zero then throw user defined Exception “Number is Zero”. If it is non-numeric then generate an error “Number is Invalid” otherwise check whether it is palindrome or not

 Slip 30 Q 1

Save code as         "palindromexception"

import java.util.*;

class ZeroException extends Exception{

    ZeroException(){

        super("Number is 0");

    }

}

class palindromexception{

    public static void main(String[] args) {

        int r,sum=0,temp;

        try{

            Scanner sc=new Scanner(System.in);

            int n=sc.nextInt();

            sc.close();

            if(n==0){

                throw new ZeroException();

            }

            else{

                temp=n;

                while(n>0){

                    r=n%10;

                    sum=(sum*10)+r;

                    n=n/10;

                }

                if(temp==sum)

                System.out.println("palindrome number "+temp);

                else

                System.out.println("not palindrome number");

            }

               

        }catch (Exception e){

            System.out.println(e);

        }

    }

}

OUTPUT:

B) Write a java program to display transpose of a given matrix.

 Slip 6 Q 2

Save code as             "Transposematrix.java"

import java.util.Scanner;

public class Transposematrix {

    public static void main(String[] args) {

        Scanner sc= new Scanner(System.in);

        System.out.print("Enter rows of matrix : ");

        int row=sc.nextInt();

        System.out.print("Enter column of matrix : ");

        int col=sc.nextInt();

       

        int[][] matrix = new int[row][col];

        //create and insert value

        for (int i=0;i<row;i++){

            for(int j=0;j<col;j++){

                System.out.print("element at index ["+i+"]["+j+"] :");

                matrix[i][j]=sc.nextInt();

            }

        }

        sc.close();

        //print value of matrix

        System.out.println("\nReal matrix :-\n");

        for (int i=0;i<row;i++){

            for(int j=0;j<col;j++){

                System.out.print(matrix[i][j]+" ");

            }

            System.out.println();

        }

        System.out.println("\nTranspose of matrix :-\n");

        for (int i=0;i<row;i++){

            for(int j=0;j<col;j++){

                System.out.print(matrix[j][i]+" ");

            }

            System.out.println();

        }

    }    

}

OUTPUT:

A) Define an Interface Shape with abstract method area(). Write a java program to calculate an area of Circle and Sphere.(use final keyword)

 Slip 8 Q 1

Save code as             "InterfaceCircleSphere.java"

import java.util.Scanner;

interface Shape{

    void area();

}

class Circle implements Shape{

    final float PI=3.14f;

    float areacircle,radius;

    Scanner s=new Scanner(System.in);

    void accept(){

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

        radius=s.nextFloat();

    }

    public void area(){

    areacircle=PI*radius*radius;

    }

    public void show()

    {

    System.out.println("Area of circle is : "+areacircle);

    }

}

class Sphere implements Shape{

    final float PI=3.14f;

    float areasphere,radius;

    Scanner s=new Scanner(System.in);

    void accept(){

        System.out.print("Enter the Radius of sphere : ");

        radius=s.nextFloat();

    }

    public void area(){

        areasphere=4*PI*radius*radius;

    }

    public void show(){

        System.out.println("Area of Sphere is : "+areasphere);

    }

}

class InterfaceCircleSphere

{

    public static void main(String args[]){

        Circle s1=new Circle();

        s1.accept();

        s1.area();

        s1.show();

        Sphere s2=new Sphere();

        s2.accept();

        s2.area();

        s2.show();

    }

}

OUTPUT:

A) Write a java Program to display following pattern:

Slip 9 Q 1

Save code as         "Pattern1.java"

            1 

            0 1 

            0 1 0 

            1 0 1 0

public class Pattern1 {

    public static void main(String[] args) {

        int num = 4;

        for (int i=0;i<num;i++){

            for(int j=0;j<=i;j++){

                if (i<2){

                    if ((i+j)%2==0){

                        System.out.print("1 ");

                    }else{

                        System.out.print("0 ");

                    }

                }else{

                    if ((i+j)%2==0){

                        System.out.print("0 ");

                    }else{

                        System.out.print("1 ");

                    }

                }

            }System.out.println();

        }

    }

}

OUTPUT:

A) Write a java program to count the frequency of each character in a given string.

 Slip 10 Q 1

save code as             "Frequencyofchar.java"

import java.util.Scanner;

public class Frequencyofchar {

    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);

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

        String str = sc.nextLine() ;  

        int[] freq = new int[str.length()];  

        int i, j;  

        char string[] = str.toCharArray();  

         

        for(i = 0; i <str.length(); i++) {  

            freq[i] = 1;  

            for(j = i+1; j <str.length(); j++) {  

                if(string[i] == string[j]) {  

                    freq[i]++;  

                     

                    //Set string[j] to 0 to avoid printing visited character  

                    string[j] = '0';  

                }  

            }  

        }  

         

        System.out.println("Characters and their corresponding frequencies");  

        for(i = 0; i <freq.length; i++) {  

            if(string[i] != ' ' && string[i] != '0')  

                System.out.println(string[i] + "-" + freq[i]);  

        }  

    }

}

OUTPUT:

A) Write a menu driven java program using command line arguments for the following:

 SLIP 11 Q 1

Save code as         "calculator.java"

import java.util.Scanner;

public class calculator {

    public static void main(String[] args){

        int num1=0,num2=0,option,ex=0;

        Scanner sc = new Scanner(System.in);

        do{

            System.out.println("Enter your choice from the following menu:");

            System.out.println("1.Addition \n2.Subtraction \n3.Multiplication \n4.Division \n5.Exit");

            option = sc.nextInt();

            if(option>4 || option<0){

                if (option==5){

                    System.out.println("You want to Exit.");

                }else

                System.out.println("Invalid choice");

            }

            else{

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

                num1=sc.nextInt();

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

                num2=sc.nextInt();

            }

            switch(option){

                case 1:System.out.println("Addition of "+num1+" and "+num2+" is "+(num1+num2));

                break;

                case 2:System.out.println("Subtraction of "+num1+" and "+num2+" is "+(num1-num2));

                break;

                case 3:System.out.println("Multiplication of "+num1+" and "+num2+" is "+(num1*num2));

                break;

                case 4: if(num2==0)

                System.out.println("Error!!! In Division denominator cannot be 0!");

                else{

                    System.out.println("In division of "+num1+" by "+num2+" is "+(num1/num2)+" and remainder is "+(num1%num2));

                }

                break;

                case 5: break;

            }

            if(option==5){

                break;

            }else{

            System.out.println("Do you want to continue? \n1.Yes \n2.No");

            ex=sc.nextInt();

            }

        }while(ex==1);

        sc.close();

    }

}

OUTPUT:

A) Write a java program to accept ‘n’ integers from the user & store them in an ArrayList collection. Display the elements of ArrayList collection in reverse order.

 SLIP 13 Q 1

SAVE CODE AS             "arrayList.java"

import java.util.ArrayList;

import java.util.Collections;

import java.util.Scanner;

public class arrayList {

    public static void main(String[] args) {

        Scanner sc= new Scanner(System.in);

        System.out.print("enter limit of array : ");

        int num=sc.nextInt();

        ArrayList<String> alist=new ArrayList<>(num);

       

        for(int i=0;i<num;i++){

            System.out.println("Enter "+i+" Element of ArrayList :");

            String elmt=sc.next();

            alist.add(elmt);

        }

        sc.close();

        System.out.println("Orignal list :"+alist);

        Collections.reverse(alist);

        System.out.println("Reverse of a ArrayList is :"+alist);

    }

}

OUTPUT:

Define an abstract class Shape with abstract methods area () and volume (). Derive abstract class Shape into two classes Cone and Cylinder. Write a java Program to calculate area and volume of Cone and Cylinder.(Use Super Keyword.)

 SLIP 3 Q 2

SAVE CODE AS         "AbstractShape.java"

import java.util.Scanner;

public class Slip3q2 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Shape shape;
        System.out.println("""
                ENTER YOUR CHOICE
                1. Cone
                2. Cylinder""");
        int choice = scanner.nextInt();
        if (choice==1){
            System.out.println("Enter radius");
            int radius = scanner.nextInt();
            System.out.println("Enter height");
            int height = scanner.nextInt();
            shape=new Cone(radius,height);
            shape.area();
            shape.volume();
        }else if (choice==2){
            System.out.println("Enter radius");
            int radius = scanner.nextInt();
            System.out.println("Enter height");
            int height = scanner.nextInt();
            shape=new Cylinder(radius,height);
            shape.area();
            shape.volume();
        }else {
            System.out.println("invalid input");
        }
    }
    abstract static class Shape{
        abstract void area();
        abstract void volume();
    }
    static class Cone extends Shape {
        int radius,height;
        Cone(int radius,int height){
            this.radius=radius;
            this.height=height;
        }
        void area(){
            float slant_height=(height*height)+(radius*radius);
            float area = (float)(Math.PI*radius*(radius+Math.sqrt(slant_height)));
            System.out.println("Area of Cone : "+area);
        }
        void volume(){
            float volume = (float)(Math.PI*radius*radius*(height/3));
            System.out.println("Volume of cone : "+volume);
        }
    }
    static class Cylinder extends Shape {
        int radius, height;
        Cylinder(int r,int h){
            radius =r;
            height =h;
        }
        public void area(){
            float area=(float)((2*Math.PI* radius * height)+(2*Math.PI* radius * radius));
            System.out.println("Area of Cylinder : "+area);
        }
        public void volume(){
            float volume=(float)(Math.PI* radius * radius * height);
            System.out.println("Volume of Cylinder : "+volume);
        }
    }
}

OUTPUT:

A) Write a java program to display following pattern:

Slip 5 Q 1

Save code as         "pattern.java"

        5

        4 5

        3 4 5

        2 3 4 5 

        1 2 3 4 5 

public class pattern {

    public static void main(String[] args) {

        int n=5;

        for (int i=n;i>0;i--){

            for (int j=i;j<=n;j++){

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

            }

            System.out.println();

        }

    }

}

OUTPUT :

A) Write a java program to display alternate character from a given string.

 SLIP 4 Q 1

SAVE CODE AS         "Alternatecharfromstr.java"

import java.util.Scanner;

public class Alternatecharfromstr {

    public static void main(String[] args) {

    Scanner sc = new Scanner(System.in);

    System.out.print

    ("Enter a string :");

    String str = sc.nextLine();

    sc.close();

    for (int i=0;i<str.length();i+=2){ //run only 2 mulriple index

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

    }

    }

}

OUTPUT :

A) Write a ‘java’ program to check whether given number is Armstrong or not. (Use static keyword)

 

 Slip 3 Q 1

SAVE CODE AS         "Armstrong.java"

import java.util.Scanner;

public class Slip3Q1 {
    static boolean is_armstrong(int n){
        int temp,last,digits=0,sum=0;
        temp = n;
        while (temp>0){
            temp=temp/10;
            digits++;
        }
        temp = n;
        while (temp>0){
            last = temp%10;
            sum+=Math.pow(last,digits);
            temp=temp/10;
        }
        return n == sum;
    }

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("Enter a number to check armstrong : ");
        int number = scanner.nextInt();
        scanner.close();
        if (is_armstrong(number)){
            System.out.println(number+" is a armstrong number.");
        }
        else {
            System.out.println(number+" is not a armstrong number.");
        }
    }
}

OUTPUT :

A) Write a ‘java’ program to display characters from ‘A’ to ‘Z’.

 SLIP 1 Q 1

SAVE CODE AS    "Slip1q1.java"

public class Slip1q1 {
    public static void main(String[] args) {
        for(char c='A';c<='Z';c++){
            System.out.print(c+" ");
        }
        System.out.println();
        for(char c='a';c<='z';c++){
            System.out.print(c+" ");
        }
    }
}

OUTPUT:

A) Write a java program to display all the vowels from a given string

 Slip 2 Q 1

SAVE CODE AS   "VowelsInString.java"

import java.util.Scanner;

public class Slip2q1 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.println("Enter a string to find vowels on it.");
        String user_string = scanner.nextLine();
        scanner.close();
        int vowel_count = 0;
        for(int i=0;i<user_string.length();i++){
            if(user_string.charAt(i)=='a' ||user_string.charAt(i)=='e'
                    ||user_string.charAt(i)=='i' ||user_string.charAt(i)=='o'
                    ||user_string.charAt(i)=='u' ||user_string.charAt(i)=='A'
                    ||user_string.charAt(i)=='E' ||user_string.charAt(i)=='I'
                    ||user_string.charAt(i)=='O' ||user_string.charAt(i)=='U'){
                vowel_count++;
                System.out.println("Vowel found ("+user_string.charAt(i)+") at index "+i);
            }
        }
        if (vowel_count == 0){
            System.out.println("Vowel not found in given string.");
        }
    }
}

OUTPUT :