Sub class of a previous java program

Sub class of a previous java program

Create a Faculty subclass of Employee which has the additional data of rank and expertise. Rank could be one of Assistant Professor, Associate Professor, or Professor. Expertise would be a String such as ?Computer Science?, ?Music?, ?History? etc. Create a Staff subclass of Employee which has the additional data of Category (Full or Part time). Provide suitable constructors for your classes. Each of these sub classes must have a changestatus() method that changes the rank or category respectively. For example, an Associate Professor could be promoted to Professor; a Full time classified could be demoted to part time. Add a changestatus() method to the Employee base class that simply outputs a message ?Cannot change this Employee?s status?.

Demonstrate dynamic binding in your main program. Declare an array of Employees (compile time type) but assign different subclasses to each array element (run time type). Show that getinfo() and changestatus() uses the methods determined by their run time types and displays all the relevant data.

The previous java program is this,

import java.util.*;

class EmployeeSalaries {
        static Scanner input = new Scanner(System.in);
        String name;
        static int amt,sal=0;

        EmployeeSalaries(String name, int sal) {
                this.name = name;
                this.sal = sal;
        }
        public void setName(String name){
            this.name=name;
        }

        public static void setSal(int sal){
            sal=sal;
        }


       static int increase() {
                System.out.print("Enter amount to increase:");
                amt = input.nextInt();
                if (amt < 0) {
                        System.out.println("Invalid Amount");
                        return 1;
                }
                sal = sal + amt;
                return 0;
        }


       static int decrease() {
                System.out.println("Your Balance=" + sal);
                System.out.print("Enter amount to decrease:");
                amt = input.nextInt();
                if (sal < amt) {
                        System.out.println("Not sufficient balance.");
                        return 1;
                }
                if (amt < 0) {
                        System.out.println("Invalid Amount");
                        return 1;
                }
                sal = sal - amt;
                return 0;
        }


        void getInfo() {
                System.out.println("Name:" + name);
                System.out.println("Balance:" + sal);

        }

        void quit() {
                EmployeeSalaries.setSal(0);
        }



        void salarychange(){
             int menu;
                System.out.println("1. Increase Salary Amount");
                System.out.println("2. Decrease Salary Amount");

                boolean quit = false;
                        System.out.print("Please enter your choice: ");
                        menu = input.nextInt();
                        switch (menu) {
                        case 1:
                                EmployeeSalaries.increase();
                                break;

                        case 2:
                                EmployeeSalaries.decrease();
                                break;

                        }
        }


        public static void main(String args[]) {
                System.out.println("Enter your Name: ");
                String nn = input.nextLine();
                System.out.println("Enter Initial Salary: ");
                int sal = input.nextInt();
                EmployeeSalaries b1 = new EmployeeSalaries(nn,sal);
                b1.salarychange();
                b1.getInfo();

        }
}
View Answers









Related Tutorials/Questions & Answers:
Sub class of a previous java program
Sub class of a previous java program  Create a Faculty subclass... java program is this, import java.util.*; class EmployeeSalaries...). Provide suitable constructors for your classes. Each of these sub classes must have
Sub-class in java
Sub-class in java      ... class and subclass. -- Inheritance allows a new class known as the sub-class... promotes the concept of code reusability and saves a lot of time. -- Sub class
Advertisements
How to access sub class member using super class object
How to access sub class member using super class object  class A{ } class B extends A{ int b=1; } class Test{ public static void main(String args[]) { what to do here to access sub class variable b using super class object
Class Average Program
Class Average Program       This is a simple program of Java class. In this tutorial we will learn how to use java program for displaying average value. The java instances
how to sort the result of this 2 class program in java.....????
how to sort the result of this 2 class program in java.....????  package setget1_method; import java.util.Scanner; public class Main... setget1_method; class LBook { private String title; private String author; private int
Simple Java class program - Java Beginners
Simple Java class program  Hello, Please help me, Write a simple class that iterates through all the arguments passed in on the command line... java.util.Iterator; public class SimpleIterator{ public static void main(String args
Simple Java class program - Java Beginners
Simple Java class program  Hi sir, Please help me Write a simple class that iterates through all the arguments passed in on the command line...; Hi import java.util.*; import java.util.Iterator; public class
for writting java program why we are taking more than one class
for writting java program why we are taking more than one class  for writting java program only one class is enough but why we are taking more than one class
ARRAY SUB - Java Interview Questions
ARRAY SUB  What Is A Sub Array ?I Want defination ?How To Declare Sub Array
source code in java for a program using class - Java Beginners
source code in java for a program using class  Dear sir/madam i want source code in java for following program: WAP which creates a class accountthat stores customer name,account number and type of account.From this derive
J2ME Sub Menu - Java Beginners
J2ME Sub Menu  I am creating a J2ME midlet in which I have created a menu by adding different commands in it. Now for example my command list is as follows 1. A 2. B 3. C 4. D 5. Exit Now my question is I want to add
Sub-Editor for Java Magazine
Sub-Editor for Java Magazine   ... Description: Sub Editor for a Java Magazine,: Sub-Editor who will work for our...; Reference: Sub Editor Java Magazine Please write back with detailed resume
write a program to demonstrate wrapper class and its methods......
write a program to demonstrate wrapper class and its methods......  write a program to demonstrate wrapper class and its methods
Some additions for my previous question - Java Beginners
, then use the Primes class to perform the calculation. The program should also...Some additions for my previous question  This is the question I posted several hours ago: "I'm trying to write a program that has a text field
Using Super class Variables With Sub-classed Objects
Using Super class Variables With Sub-classed Objects  ... features of java is that it is follows a OOPs concept, and one of the feature of OOP in java is that, we can assign a subclass object or variable to the variable
Addition to my previous post - Java Beginners
Addition to my previous post  Addition to my previous question about the address book program. I need to have separate classes: CmdLineAddressBook.java AddressBook.java Contact.java Address.java Name.java
java class
java class  write a java program to display a msg "window closing" when the user attempts to close the window.(a) create a window class (b) create frame within the window class (c) extends window adapter class to display the msg
Date Next and Previous - Java Interview Questions
java.util.*;import java.text.*; public class StringToDate{ public static void main
java class
java class  please send me the answer of the question which i have send according of java class assoon as possible . Write a java program to display.... a. Create a window class. b. Create frame within the window class. c. Extend
Java class
Java class  What is the purpose of the Runtime class
Java httpservlet
Java httpservlet       HttpServlet class is an abstract class defined in "javax.servlet.http" package and is sub class of GenericServlet class defined in "javax.servlet
Java Previous Iterator
Java previous Iterator function is present in the listIterator Interface... direction. Java Previous Iterate Example import java.util.ArrayList; import java.util.ListIterator; public class previous { public static void
Java - Class, Object and Methods in Java
Java - Class, Object and Methods in Java   ... will see how to use the class, object and it's methods. This program uses.... In this program there are two classes has been used except the main class in which
java program - Java Beginners
java program  m postin a program...hv 2 create a class,wid 6 data membr havin name,no,grade,n marks n 3 sub..........dere vil b 3 membr function.d... sub)....n vil display it.....how 2 solve it?????plz reply.m a beginner..so facin
Java Abstract Class
Java Abstract Class      ...;  --or--ADS_TO_REPLACE_1 Java provides a special type of class called... class contains abstract methods. Program can't instantiate an abstract class
ModuleNotFoundError: No module named 'sub'
ModuleNotFoundError: No module named 'sub'  Hi, My Python program is throwing following error: ModuleNotFoundError: No module named 'sub' How to remove the ModuleNotFoundError: No module named 'sub' error
Java program to get class name without package
Java program to get class name without package ... example which describes you that how you can get the class name without package. For this purpose we have to fetch first the full class name with package
java program
java program  java program to implement the reflection of a particular class details like constructor,methods and fields with its modifiers
java program
java program  write a java program which shows how to declare and use STATIC member variable inside a java class.   The static variable are the class variables that can be used without any reference of class. class
JAVA PROGRAM
JAVA PROGRAM  To write a java prograam to create a employee class, full time employee class, part time employee class using inheritance
Java Program
Java Program  I want to Write a program in JAVA to display to create a class called MATRIX using a two-dimensional array of integers. Perform the addition and subtraction of two matrices. Help me
java program
java program   You need to keep record of under- graduate, PhD students, faculty and staffs of your institute. Write an abstract class Person...: String 3. Method Get_info() returns information of the person Extend class
java program
java program  wap to show concept of class in java
How to eliminate error," Could not find the main class: filecopy.FileCopy. Program will exit." ?
class: filecopy.FileCopy. Program will exit. Exception in thread "main" Java...How to eliminate error," Could not find the main class: filecopy.FileCopy. Program will exit." ?  run: java.lang.NoClassDefFoundError: filecopy
Java Bytebuffer
Java Bytebuffer       ByteBuffer is one of the sub class of abstract class Buffer in the "nio" package.  Buffer class has subclasses for each non-boolean primitive
java program
java program  write a java program to add or substract days in current date and time value using JAVA calender class.   Add Days import java.util.*; public class AddDaysToDate { public static void main(String
abstact class - Java Beginners
abstact class  write a java program to implement an animal abstact class
How to Read file line by line in Java program
in Java using Scanner Class: Besides the Buffer reader, using Scanner class... by line in Java. But there are various ways that can help read a larger file... having less amount of memory. In the example of Java Read line by line below
java program
java program  write a program showing two threads working... "show the tikect")   import java.io.*; class Theater{ public static...); t1.start(); t2.start(); } } class MyClass implements Runnable
java program
java program  write a java program to read a file content into a string object using available and read methods of java bufferedinputstream.   Please visit the following link: http://www.roseindia.net/java/example/java
java program
java program  Create a washing machine class with methods as switchOn, acceptClothes, acceptDetergent, switchOff. acceptClothes accepts the noofClothes as argument & returns the noofClothes
Java inner class and static nested class
Java inner class and static nested class  Java inner class and static nested class
Java program
Java program  Write a Java program that demonstaress multiple inheritance.   Java does not support Multiple Inheritance but you can show... IntefaceA,InterfaceB { void method3(); } class InterfaceExample implements
Java program
Java program  Write a Java program that takes 3 integer numbers from...;Java display maximum number using conditional operator: import java.util.*; class Greatest { public static void main(String[] args) { Scanner
JAva program
JAva program  Write a JAva program that takes various string from command line and display them in sorted order.   Java display strings in sorted order: import java.util.*; class ArraySort{ public static void main
abstract class and overriding - Java Beginners
abstract class and overriding? Interface? Give some example program?   Hi friend, Abstract class : In java programming language, abstract classes... methods, which has to be implemented by sub classes. *)Abstract class is a Class
java program
java program  my array size is 10, then how can i identify class A object from array. Q) how jvm know a particular object is serialize
Java program
Java program  Write a Java program that tales filename or directo;ry... of files in that directory.   Java Check File import java.io.*; import java.util.*; class CheckFile { public static void main(String[] args
Java program
Java program  Write a java program which reads in a file, whose name is given by the user ,and o perform the following tasks:- ââ?¬Â¢ To read data... for all persons in an array of objects using Tokenizer class to separate data
java program
java program  (1) WAP in java to take input of int,string,float and print them (use scanner class)? Sample output- Enter an int : 10 Enter a string... of a circle and calculate area? formula=pirr (use math class) sample output

Ads