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What you said makes sense. Thanks a lot for the help, copeg.

@copeg. So you think that the best solution would be to instantiate an object of Baby within Adult to get code re-use? I think your reasoning that there is a child inside us all is creative. IMO,...

Say you had these two classes:


public class Adult {
public void crawl() {...}
public void walk() {...}
public void run() {...}
}

public class Baby {