public class Test {
    public static void main(String[] args) {
        JObject j = new JObject("j");
        JObject k = new JObject("k", 19);

        System.out.println("");
        System.out.println("Test 1:   ");     

        System.out.println("[ JObject j = new JObject('j'); JObject k = new JObject('k', 19); ]");

        System.out.println("[ KObject a = new KObject ('farming', 100); KObject n = new KObject ('farming', 100); ]");
        KObject a = new KObject ("farming", 100);
        KObject b = new KObject ("fishing", 30);
        
        System.out.println ("a.equals (b) : " + a.equals (b));
        System.out.println ("b.equals (a) : " + b.equals (a));

        System.out.println("");
        System.out.println("Test 2:   ");
        
        System.out.println("[JObject x = a; JObject y = b]");
        JObject x = a;
        JObject y = b;
        
        System.out.println ("a.equals (y): " + a.equals (y));
        System.out.println ("a.equals (x): " + a.equals (x));
        System.out.println ("b.equals (y): " + b.equals (y));
        System.out.println ("b.equals (x): " + b.equals (x));
        
        System.out.println ("Test 2, reversed:");
        System.out.println ("y.equals (b): " + y.equals (b));
        System.out.println ("y.equals (a): " + y.equals (a));
        System.out.println ("x.equals (b): " + x.equals (b));
        System.out.println ("x.equals (a): " + x.equals (a));
        
        System.out.println ("Test 3:");
        System.out.println ("x.equals (y): " + x.equals (y));
        System.out.println ("y.equals (x): " + y.equals (x));
        
    }
}

class JObject {
    private String name; 
    private int age;

    public JObject() {
        this("Unknown", 0);
    }

    public JObject(String name) {
        this(name, 0);
    }

    public JObject(String name, int age) {
        this.name = name;
        this.age = age;
    }

    public String getName() {
        return this.name;
    }

    public int getAge() {
        return this.age;
    }

    public void setName(String name) {
        this.name = name;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public boolean equals(JObject obj) {
        return (this.compareTo(obj) == 0);
    }

    public int compareTo(JObject obj) {
        int comparison = 0;

        if(this.age == obj.age) {
            // Could just as equally be case sensative... doesn't matter.
            comparison = this.name.compareToIgnoreCase(obj.name);
        } else {
            if(this.age < obj.age) {
                comparison = -1;
            } else {
                comparison = 1;
            }
        }

        return comparison;
    }

    public int hashCode() {
        return Integer.parseInt(this.name.hashCode() + "" + this.age);
    }

    public String toString() {
        return ("JObject( name = '" + this.name + "', age = " + this.age + " )");
    }
}

class KObject extends JObject {
    private String skill;
    private int speed;

    public KObject(String skill, int speed) {
        this(skill, speed, "Unknown");
    }

    public KObject(String skill, int speed, String name) {
        this(skill, speed, name, 0);
    }

    public KObject(String skill, int speed, String name, int age) {
        this.skill = skill;
        this.speed = speed;
        this.setName(name);
        this.setAge(age);
    }

    public String getSkill() {
        return this.skill;
    }

    public int getSpeed() {
        return this.speed;
    }

    public void setSkill(String name) {
        this.skill = name;
    }

    public void setSpeed(int age) {
        this.speed = age;
    }

    public boolean equals(KObject obj) {
        return (this.compareTo(obj) == 0);
    }

    public int compareTo(KObject obj) {
        int comparison = 0;

        if(super.equals(obj)) {
            if(this.skill.equalsIgnoreCase(obj.skill)) {
                // Could just as equally be case sensative... doesn't matter.
                comparison = this.speed - obj.speed;
            } else {
                comparison = this.skill.compareToIgnoreCase(obj.skill);
            }
        } else {
            comparison = super.compareTo(obj);
        }

        return comparison;
    }

    public int hashCode() {
        return Integer.parseInt(super.hashCode() + "" + this.skill.hashCode() + this.speed);
    }

    public String toString() {
        return ("KObject( name = '" + this.getName() + "', age = " + this.getAge() + ", skill = " + this.skill + ", speed = " + this.speed + " )");
    }
}