What are the three types of Java?

Java Platform, Standard Edition (Java SE) Java Platform, Enterprise Edition (Java EE) Java Platform, Micro Edition (Java ME)

A main() method in java is an entry point to start the execution of a program . Every Java application has at least one class and at least one main method. Normally, an application consists of many classes and only one of the class needs to have a main method.

Static methods : A static method is a method that can be called and executed without creating an object. … Instance methods: These methods act upon the instance variables of a class. … Factory methods: A factory method is a method that returns an object to the class to which it belongs.