Description Rémi Forax 2009-03-04 14:39:49 EST

Build ID: I20090202-1535

Steps To Reproduce:
1. try the example, the error message is weird

interface I1 {
  I1 hello();
}

interface J1 {
  J1 hello(); 
}

class C1 implements I1, J1 {
  
}

Error Message:
The return types are incompatible for the inherited methods J1.hello(), I1.hello()

The error message is misleading because this example
compiles:

class C1 implements I1, J1 {
  public C1 hello() { ... }
}

Since Java 1.5, covariant return type are allowed.

This message is valid if the compiler is configure to use version 1.4 or 
if the two return types doesn't have any subtype. 

More information: