/**
 * Example Derived class
 * @author Brad Rippe
 */
public class DerivedClass extends BaseClass {

    public int derivedInt = 0;

    /**
     * Indicates whether some other object is "equal to" this one.
     * @param obj  the object to check for equality
     * @return  true if the the obj is equal to this DerivedClass, otherwise false
     */
    public boolean equals(Object obj) {
        System.out.println("DerivedClass Equals");
		if(obj == null)
            return false;
        if(obj == this)
            return true;
		// instance of this type?
        if(!(obj instanceof BaseClass))
            return false;

        if(!(obj instanceof DerivedClass))
            return false;
		// compare primitive types

        DerivedClass dc = (DerivedClass) obj;

        if(this.derivedInt != dc.derivedInt)
            return false;

        // if DerivedClass composition
        // compare their objects with the
        // .equals()

        return true;
    }
}