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In a Java program, I have multiple subclasses inheriting from a parent (which is abstract). I wanted to express that every child should have a member that is set once only (which I was planning to do from the constructor). My plan was to code s.th. like this: public abstract class Parent { protected final String birthmark; } public class Child extends Parent { public Child(String s) { this.birthmark = s; } } However, this seems to not please the Java gods. In the parent class, I get the message that birthmark "might not have been initialized", in the child class I get "The final field birthmark cannot be accessed". So what's the Java way for this? What am I missing?
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