Question

public class Atribut {
int classid;

@Override public String toString() {
return Integer.toString(classid);


}

}

I have made this class which overrides method toString(). I plan on making many subclasses with different classid. The problem is I dont know how to set the variable classid to work in toString method.

public class cas extends Atribut{
int classid=2;


}

The problem is if I make an cas object and toString method it returns “0” not “2”.??

Answer 1

Much as @java_mouse recommended, just use the parent class’s variable.

public class Atribut {
    protected int classid;

    public Atribut() {
        classid = 0;
    }

    @Override
    public String toString() {
        return Integer.toString(classid);
    }    
}

public class Cas extends Atribut{
    public Cas() {
        classid = 2;
    }
}

Set classid‘s value in the constructor and then you can use the superclass’s toString() just fine.