Why class can''t extend more than one class, Why is an Interface be able to...

Why is an Interface be able to extend more than one Interface but a Class can't extend more than one Class? Basically Java doesn't permit multiple inheritances, so a Class is r

1. Create a text file (you can name it sales.txt) that conta, 1. Create a t...

1. Create a text file (you can name it sales.txt) that contains in each line the daily sales of a company for a whole month. Then write a Java application that: a. asks the user fo

What does it mean that a method or field is static, What does it mean that ...

What does it mean that a method or field is "static"? Static variables and methods are instantiated only once per class. In other words they are class variables, not example va

Define enumeration, Define enumeration? Enumeration is explained as val...

Define enumeration? Enumeration is explained as values type that having of a set of named values. These values are constants and are called enumerators. An enumeration type is

Explain the importance of abstract classes in java, Question: (a) Expl...

Question: (a) Explain the importance of abstract classes in Java with an appropriate example. (b) Explain what is meant by an interface in Java? Use a simple example to il

Package in java? , It helps to resolve naming conflicts when different pack...

It helps to resolve naming conflicts when different packages have classes with the same names. This also helps you prepare files within your project. As define : java.io package

Functions of specific codes, Please can you write some codes and their func...

Please can you write some codes and their functions too. At least 10! Please

How to write exception subclasses, How to Write Exception Subclasses ? ...

How to Write Exception Subclasses ? Most exception subclasses inherit all their functionality from the superclass. Each subclass majorly serves as a marker for a various types

Difference between other regular methods and constructors,

Define object-to-relational (o/r) mapping, Object-to-Relational (O/R) mappi...

Object-to-Relational (O/R) mapping : There are various ways to persist data and the persistence layer is one of the most important layers in any application development. O/R ma