java demo tutorial
This java demo tutorial covers from Basics. A Beginner who want to learn programming can easily learn concepts, start coding and learn advanced topics to expertise.
All Android Apps are written in Java.
To learn data analytics/ Big data you need to strong in java
The Java Demo tutorial explained on reserve words and Identifiers. covered in detail with the syntax’s and explained by a programming where ever it is required.
Reserved words have specific meanings in Java and cannot be used in other ways:
An identifier is a sequence of one or more characters.
An identifier is a name given to a package, class, interface, method, or variable. It allows a programmer to refer to the item from other places in the program.
Three things to remember when choosing an identifier:
Reserved word cannot be used.
They cannot start with a digit but digits can be used after the first character (e.g., name1, n2ame are valid).
The only symbols you can use are the underscore (i.e., “_”) and dollar sign (i.e., “$”).
Class names should be nouns in Upper Camel Case, with the first letter of every word capitalized. Use whole words — avoid acronyms and abbreviations (unless the abbreviation is much more widely used than the long form, such as URL or HTML).
Methods should be verbs in lower CamelCase or a multi-word name that begins with a verb in lowercase. i.e with the first letter lowercase and the first letters of subsequent words in uppercase.
A variable is an identifier that represents a location in memory that holds a particular type of data
Identifiers are the names we give to variables.
Variables must be declared before they can be used
The syntax of a variable declaration:
There are three kinds of variables in Java:
Class / static variables