Break OO privacy: Difference between revisions

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All classes are vulnerable to this, including <code>String</code> (and therefore, string literals). How long is the word "cat"?

<lang Java>import java.lang.reflect.*;

public class BreakString{

public static void main(String... args) throws Exception{

Field f = String.class.getDeclaredField("value");

f.setAccessible(true);

f.set("cat",new char[]{'t','i','g','e','r'});

System.out.println("cat");

System.out.println("cat".length());

}

}

</lang>

{{out}}

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tiger

5