Character Sets
Java supports a wide range of characters as per Unicode, and these can be grouped into common character sets or character classes:
Features / Busswords
1. Simple: Java is easy to learn becuase most of the complex or confusing features of C and C++ like pointers, operator overloading etc are not provided in Java.
Keywords
Keywords are simple english words which are having predefined meaning in Java Programming Language.
Identifiers
Identifiers are the names those will be used to identify the programming elements like classes, methods, variables etc uniquely.
Data types
There are two types of data types.
Variables
Variable is the container which holds user data. Memory will be allocated for the variable while executing the program.
Constants
Constants is a special variable whose value can't be modified during the program execution.
Literals
A literal in programming is a fixed value written directly in the code. It represents the actual data that a program uses.
Summary
Boolean Literals