JAVA Theory Part-3

DEFINITIONS(Part-3)

Stream: It is the flow of Characters maintained by the System. Characters flow from either input devices or processors to the Standard Output Device (VDU).

Exception: An Exception is an unexpected situation that occurs during the execution of the program. It may be due to improper use of input resources or overflow situation.

Error: An error is an improper situation, misuse of terms, undesired result giver, grammatical error in the program.

Exception Handling: Overcoming an exception is known as Exception handling. In Java Programming generally, it is done with Try-Catch keywords.

Wrapper Class: Wrapper class is used to create objects for the values of primitive data types. It wraps the primitive data type values into an object. It also provides conversion between character/string to other primitive types.

Data Member: The state or characteristics of an object are considered to be as a Data member.

Member method: The behavior and functions of an object are considered to be the Member methods.

Static Data member: It is an instance variable which is global in the class and used commonly by all the objects of that class.

Static member Method: It is a member method which uses only static data members or static instant variables.

Package: A Package is a set of classes. Which carry out a certain task. They are imported into the program.

User Defined Package: A User can create a package to use them in the program logic. A package may be defined by the users to be used in various program logic. These are known as user-defined packages.

Input Stream: An Input Stream contains functions related to input/output operations. It allows the user to enter the value from the console at the time of execution.

Buffer: It is a high-speed temporary memory storage which is applied between I/O devices and processor to synchronize their speeds.

Array:  An array is a structure created in the memory to represent a number of the same type of data using the only single variable.

Subscripted variable: When the elements of an array are specified by a single Subscript, the array is called the subscripted variable.

Subscript: Each Individual element of an array is termed as Subscript.

JDK: Java Development Kit contains various libraries that can be used in the program. It is needed to run or write a Java Program.

JRE: Java Runtime Environment.

Tokens: Each individual and functional unit of a Java Program is considered as Tokens.

Literals: Literals are the constants in the Java Program. Their Value remains fixed throughout the program.

Escape Sequences: These are the non-Graphic Characters which are used to control the cursor while printing. Ex: \n – new line, \t – horizontal tab.

Separators: These are the special characters in Java, used to separate or enclose different variables or characters. Ex: (.), (,) (), [], {}.