Thread: declaring in my mutator

So this is a hw assignment and I'm having a little trouble with it. I am a beginner (first programming class EVER) but I'm a quick learner so bare with me lol :-)

The assignment is to make 2 classes (done that part) one called gorilla and the other called cat. In gorilla are as follows:
-instance variables weight and name
-accessors and mutators for both instance variables

The problem I'm having because my prof wants us to make sure the mutator for weight CAN'T be set to a negative number


So here's my mutator for weight for gorilla:

 
 public void setGweight(int x) {
        x != -0; //clearly Java DOES NOT agree with this statement
    }

Any ideas on how to fix this?

Thanks in advance! From one beginner to the pros and all...I can't wait to get better at this!

You know what...I totally forgot abt using an if statement! lol But she didn't say what the code is supposed to do if it detects a negative number, but to make sure that it CAN'T be a negative number (if that makes sense) after that part we are to use constructors to set the name and weight to default values... the full text of the error message says that

  public void setGweight(int x) {
        x != -0; //not a valid statement
    }

But when I type

  public void setGweight(int x) {
       if  (x != -0) {
return false; //error reads saying: cannot return a value from method whose result type is void--Unnecessary return statement
   }
 }

But I don't know how else to say that.