38 lines
984 B
Java
38 lines
984 B
Java
// references/HorrorFlick.java
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// (c)2016 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://mindviewinc.com/Books/OnJava/ for more book information.
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// You can insert Cloneability
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// at any level of inheritance.
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class Person {}
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class Hero extends Person {}
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class Scientist extends Person
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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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// Should never happen; it's Cloneable:
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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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