java what is static
In the Java programming language, the keyword static indicates that the particular member belongs to a type itself,
rather than to an instance of that type.
This means that only one instance of that static member is created which is shared across all instances of the class.static class java
// Java program to Demonstrate How to
// Implement Static and Non-static Classes
// Class 1
// Helepr class
class OuterClass {
// Input string
private static String msg = "GeeksForGeeks";
// Static nested class
public static class NestedStaticClass {
// Only static members of Outer class
// is directly accessible in nested
// static class
public void printMessage()
{
// Try making 'message' a non-static
// variable, there will be compiler error
System.out.println(
"Message from nested static class: " + msg);
}
}
// Non-static nested class -
// also called Inner class
public class InnerClass {
// Both static and non-static members
// of Outer class are accessible in
// this Inner class
public void display()
{
// Print statement whenever this method is
// called
System.out.println(
"Message from non-static nested class: "
+ msg);
}
}
}
// Class 2
// Main class
class GFG {
// Main driver method
public static void main(String args[])
{
// Creating instance of nested Static class
// inside main() method
OuterClass.NestedStaticClass printer
= new OuterClass.NestedStaticClass();
// Calling non-static method of nested
// static class
printer.printMessage();
// Note: In order to create instance of Inner class
// we need an Outer class instance
// Creating Outer class instance for creating
// non-static nested class
OuterClass outer = new OuterClass();
OuterClass.InnerClass inner
= outer.new InnerClass();
// Calling non-static method of Inner class
inner.display();
// We can also combine above steps in one
// step to create instance of Inner class
OuterClass.InnerClass innerObject
= new OuterClass().new InnerClass();
// Similarly calling inner class defined method
innerObject.display();
}
}Copyright © 2021 Codeinu
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