static Java Keyword
The static is a keyword defined in the java programming
language. Keywords are basically reserved words which have specific meaning
relevant to a compiler in java programming language likewise the static
keyword indicates the following :
-- The static keyword is applicable to an inner class (a class defined
within another class), method or field.
-- In java language, a static keyword is used with a class (inner) needed to be instantiated, even this may be referenced by some other class indicating as if it - were a top−level class in the class hierarchy.
The example shown below shows how to use static keyword with a class:
|
public class Class1{ static class Class2; } |
-- A static keyword can
also be used with a field of a class, such a field exists across all
the instances of that particular class.
-- the syntax shown below is used to declare the class constants required to
be used from outside the class.
| public final static <type> varName = <value>; |
Example to use the static keyword with a variable and with a constant:
|
public class Class1 { public final static int MAX_OBJECTS = 100; static int x = 0; } |
-- A static method is invoked even from outside the
class without requiring to create the instants of that particular class. We
all aware of the use of the " public static void main method()" in
most of the console base programming environments.
Example to use the
static keyword with a method:
|
public class Class1{ static int getObjects(){ } ... |