Created
November 24, 2011 04:33
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Phantom Type Java
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class Book<P> { | |
String title; | |
public Book(String s) { | |
title = s; | |
} | |
} | |
interface Biography {} | |
interface Comic {} | |
public class Test { | |
public static Book<Biography> isaacsonWrite(String name) { | |
return new Book<Biography>(name); | |
} | |
public static Book<Comic> stanLeeWrite(String name) { | |
return new Book<Comic>(name); | |
} | |
public static void marvelPublish(Book<Comic> c) { | |
System.out.println("Marvel publish " + c.title); | |
} | |
public static void main(String [] args) { | |
// marvelPublish(isaacsonWrite("Steve Jobs")); // compile error! | |
marvelPublish(stanLeeWrite("Ironman")); | |
} | |
} |
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