When should I use “this” in a class?

Question

I know that this refers to a current object. But I do not know when I really need to use it. For example, will be there any difference if I use x i

Answer 1

Following are the ways to use ‘this’ keyword in java :

1. Using this keyword to refer current class instance variables
2. Using this() to invoke current class constructor
3. Using this keyword to return the current class instance
4. Using this keyword as method parameter

https://docs.oracle.com/javase/tutorial/java/javaOO/thiskey.html