Static Keyword in Java

Static Keyword in Java

• Static keyword is mainly used for memory management.
• Static keyword can be use in variables, methods, blocks and nested classes.
• Static variable values can not be change/modify at any case.
• The main method of a class is generally labelled static.
• To call a static method, we don’t want to create an object, it’s enough to mention the class name alone to access the static methods.
• Static variables/methods can also be called as class variables/class methods.

Example For static variable:

Example For static method:

Example For static block:

Example For static nested class:

class OuterClass{
static int data=30;
static class InnerClass{
void msg(){System.out.println("data is "+data);}
}
public static void main(String args[]){
OuterClass.InnerClass oi=new OuterClass.InnerClass();
oi.msg();
}
}