Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Restrictions applied to Java static methods
If the static keyword is applied to any method, it becomes a static method.
If a method is declared as static, it is a member of a class rather than belonging to the object of the class. It can be called without creating an object of the class. A static method also has the power to access static data members of the class.
There are a few restrictions imposed on a static method
The static method cannot use non-static data member or invoke non-static method directly.
The this and super cannot be used in static context.
The static method can access only static type data (static type instance variable).
There is no need to create an object of the class to invoke the static method.
A static method cannot be overridden in a subclass
Let us see what happens when we try to override a static method in a subclass
Example
class Parent {
static void display() {
System.out.println("Super class");
}
}
public class Example extends Parent {
void display() // trying to override display() {
System.out.println("Sub class");
}
public static void main(String[] args) {
Parent obj = new Example();
obj.display();
}
}This generates a compile time error. The output is as follows −
Example.java:10: error: display() in Example cannot override display() in Parent void display() // trying to override display() ^ overridden method is static 1 error
3K+ Views
