Why there is the need of getters and setters in java

Question

Why use getters and setters instead of public fields variables?

Answer 1

In Java getters and setters are completely ordinary functions.

The reason for using getters and setters instead of making your members public is that it makes it possible to change the implementation without changing the interface. Also, many tools and toolkits that use reflection to examine objects only accept objects that have getters and setters. JavaBeans, for example, must have getters and setters as well as some other requirements.