31 lines
838 B
Java
31 lines
838 B
Java
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//: references/HorrorFlick.java
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// You can insert Cloneability at any level of inheritance.
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import java.util.*;
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class Person {}
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class Hero extends Person {}
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class Scientist extends Person implements Cloneable {
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public Object clone() {
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try {
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return super.clone();
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} catch(CloneNotSupportedException e) {
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// This should never happen: It's Cloneable already!
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throw new RuntimeException(e);
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}
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}
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}
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class MadScientist extends Scientist {}
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public class HorrorFlick {
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public static void main(String[] args) {
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Person p = new Person();
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Hero h = new Hero();
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Scientist s = new Scientist();
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MadScientist m = new MadScientist();
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//! p = (Person)p.clone(); // Compile error
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//! h = (Hero)h.clone(); // Compile error
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s = (Scientist)s.clone();
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m = (MadScientist)m.clone();
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}
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} ///:~
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