Skip to main content

Define a class MyNumber having one private int data member. Write a default constructor to initialize it to 0 and another constructor to initialize it to a value (Use this). Write methods isNegative, isPositive, isZero, isOdd, isEven. Create an object in main. Use command line arguments to pass a value to the object (Hint : convert string argument to integer) and perform the above tests. Provide javadoc comments for all constructors and methods and generate the html help file.



import java.util.*;

public class MyNumber
{
    int x;
    public MyNumber()
    {
         x=0;
    }
    public MyNumber(int x)
    {
         this.x=x;
    }
    public boolean isNegative()
    {
         if (x<0)
            return true;
         else
            return false;
    }
    public boolean isPositive()
    {
         if (x>0)
            return true;
         else
            return false;
    }
    public boolean isZero()
    {
         if (x==0)
            return true;
         else
            return false;
    }
    public boolean isOdd()
    {
         if (x%2!=0)
            return true;
         else
            return false;
    }
    public boolean isEven()
    {
         if (x%2==0)
            return true;
         else
            return false;
    }
    public static void main(String [] args) throws ArrayIndexOutOfBoundsException
    {
         int x=Integer.parseInt(args[0]);
         MyNumber m=new MyNumber(x);
         if (m.isNegative())
            System.out.println("Number is negative");
         if (m.isPositive())
            System.out.println("Numer is positive");
         if (m.isEven())
            System.out.println("Number is even");
         if (m.isOdd())
            System.out.println("Number is odd");
         if (m.isZero())
            System.out.println("Number is zero");
     }
 }

Comments

Post a Comment

Popular posts from this blog

Write a program to read book information (bookid, bookname, bookprice, bookqty) in file “book.dat”. Write a menu driven program to perform the following operations using Random access file: i. Search for a specific book by name. ii. Display all book and total cost

  import java . io .*; import java . util .*; class Book {       String name , id ;       int qty ;       double price , total ;       Book ( String i , String n , String p , String q )      {               name = n ;               id = i ;               qty = Integer . parseInt ( q );               price = Double . parseDouble ( p );               total = qty * price ;      }       public String toString ()      {               System . out . println ( "name\t id\t qty\t price\t total" );               String s = name + "\t" + id + "\t" + qty + "\t" + price + "\t" + total ;           ...
Post a Comment
Read more

Write a Java program to design a screen using Awt that will take a user name and password. If the user name and password are not same, raise an Exception with appropriate message. User can have 3 login chances only. Use clear button to clear the TextFields.

  import java . awt .*; import java . awt . event .*; import javax . swing .*; class InvalidPasswordException extends Exception {       InvalidPasswordException ()       {             System . out . println ( "Username and password is not same" );       } } public class Password extends Frame implements ActionListener {       Label uname , upass ;       TextField nametext ;       TextField passtext , msg ;       Button login , Clear ;       Panel p ;       int attempt = 0 ;       char c = '*' ;             public void login ()       {             p = new Panel ();             uname = new Label ( "Username : " , Label . CENTER );             upass = n...
Post a Comment
Read more

Create an abstract class “order” having members id,description.Create two subclasses “Purchase Order” and “Sales Order” having members customer name and Vendor name respectively.Define methods accept and display in all cases. Create 3 objects each of Purchase Order and Sales Order and accept and display details.

  import java . io .*; abstract class Order {       String description ;       int id ; } class PurchaseOrder extends Order {       String customername , vendorname ;             public void accept () throws IOException      {             System . out . println ( "Enter description, customername and vendorname,id :" );             BufferedReader br = new BufferedReader ( new InputStreamReader ( System . in ));                         description = br . readLine ();             customername = br . readLine ();             vendorname = br . readLine ();             id = br . read ();      }             public void display () ...
Post a Comment
Read more