Fanatah Java Academy

*Today's lesson*

JAVA IDENTIFIERS

BY FANATAH | UNDER JAVA BASICS.

NB* This is a certification topic*

All Java components require names. Names used for classes, variables, and methods are
called identifiers.

E.g.
class Hallo{ }

class is a keyword.
Hallo is an identifier.

int x = 12;

int is a keyword.

x is an identifier.

In Java, there are several points to remember about identifiers.

They are as follows:
1. All identifiers should begin with a letter (A to Z or a to z), currency character ($)
or an underscore (_).

2. After the first character, identifiers can have any combination of characters.
1.A key word cannot be used as an identifier.

2.Most importantly, identifiers are case sensitive.
3.Examples of legal identifiers: age, $salary, _value, __1_value.
4.Examples of illegal identifiers: 123abc, -salary.

Java Modifiers:

Like other languages, it is possible to modify classes, methods, to provide or deny access to a thing., by using modifiers.

There are two categories of modifiers:

1. Access Modifiers: default, public , protected, private

2. Non-access Modifiers: final, abstract, strictfp.

NB* can someone tell us what strictfp means and where it can be applied..??

Java Variables:

Following are the types of variables in Java:

1. Local Variables

2. Class Variables (Static Variables)

3.Instance Variables (Non-static Variables)