CODEWITHSUNDEEP
java
Steve Haley
Steve Haley

Reputation: 55714

Inheritance - warning when shadowing superclass variable with same name

When using Java, is there a way to get a compiler warning (using Eclipse, if it matters) when a child class shadows a super class's instance variables by declaring another one of the same name? For example:

class A {
    String variable;

    A() {
        variable = "A";
    }
}

class B extends A {
    int variable;

    B() {
        variable = 1;
    }
}

B b = new B();
System.out.println("Variable value: " + b.variable + ", " + ((A) b).variable);
// prints out: "Variable value: 1, A"

I'd like to be warned in B that variable already exists.

Upvotes: 3

Views: 515

Answers (1)

Robin
Robin

Reputation: 24262

Yes. In Eclipse go to 

Preferences->Java->Compiler->Errors/Warnings

In that pane there is a subsection on Name shadowing and conflicts that contains the options you are looking for.

Upvotes: 6

Related Questions