I need to do lot of refactoring (actually need to change field names) in eclipse. It is changing all occurrences, references of fields. But one thing is it is not changing getter/setter names which have been generated based on previous name.
Do we have any plugin to do this or any configuration change needed to be done?
Yes, in Galileo the "rename" dialog has an option for changing the setters and getters of a field - see here. (Alternatively, you can use CTRL + SHIFT + R, and open the context menu from the down arrow that appears after pointing the selection.)
Before Galileo, you'd have to do 3 actions instead of one (not that bad)
ALT+SHIFT+R is the default keyboard shortcut for renaming ... it's awesome!
There is no real necessity for 'getters' and 'setters' to have the same name as the internal field. In fact many would argue that linking the two together is a violation of the data hiding principles of object oriented programming. Part of the point of having getters and setters is to protect the rest of the code from changes that are internal to the class, like renaming.
Having said that, if you absolutely decide that you need to rename the methods as well as the fields, then Eclipse will do it for you. You have to do them separately, but the same 'rename' that you are using for renaming fields works for methods. Just select the method and do what you did before.