Question

I am using Eclipse v3.5.

In previous Eclipse versions i remember if i have defined a method with a parameter and didn’t use it internally a warning appears, like this :

public void myMethod( int x ) {
  // Didn't use x here so a warning appears at the x parameter.
}

But in v3.5 i do not see this warning. How can i enable it in Eclipse ?

Answer 1

See

Window / Preferences / Java / Compiler
/ ErrorsWarnings / Unnecessary Code /
Value of parameter is not used

In old versions (before Eclipse Juno?) the setting was called “Parameter is never read”.

Note:

If there is a valid reason for not using a parameter (e.g. it is used via reflection), you can suppress the warning by annotating the method with

@SuppressWarnings("unused")