Difference between this.methodName() call and methodName() call in class?

Question

Hi Friend,
Wish you all Happy New Year 2011.
When I am writing Struts2 Action class, within the Action class(Controller in respect of MVC),
what is the difference between calling a method by methodName() only and calling a method by this.methodName() ? Should I use this.methodName() or only methodName() when within same class?
Below are two fragment of code, please tell me which is better(Both code is running)
editService.savePerson(getPersonBean());
or
editService.savePerson(this.getPersonBean());
is better?
code fragment1>
public class EditAction extends ActionSupport {
......some more code here....
public Person getPersonBean() {          
          return personBean;
public String execute() throws Exception {
     editService.savePerson( getPersonBean() );
     return SUCCESS;
code fragment2>
public class EditAction extends ActionSupport {
......some more code here....
public Person getPersonBean() {          
          return personBean;
public String execute() throws Exception {
     editService.savePerson( this.getPersonBean() );
     return SUCCESS;
}

Answer 1

The "this" keyword refers to the current instance, when inside an instance method (or an instance initializer).
It's not usually required unless there's a chance of confusion (which can't really happen with methods, but can easily happen with variables if you keep similarly named variables in the local scope).
It's all quite basic Java stuff, so you might want to find yourself a tutorial which explains all the ways how "this" works.