/*
* file: HiddenFieldModification.java
* package: oreilly.hcj.reflection
*
* This software is granted under the terms of the Common Public License,
* CPL, which may be found at the following URL:
* http://www-124.ibm.com/developerworks/oss/CPLv1.0.htm
*
* Copyright(c) 2003-2005 by the authors indicated in the @author tags.
* All Rights are Reserved by the various authors.
*
########## DO NOT EDIT ABOVE THIS LINE ########## */
import java.lang.reflect.Field;
/**
* Demonstrates how to set public field objects.
*
* @author Robert Simmons jr. (kraythe)
* @version $Revision: 1.3 $
*/
public class HiddenFieldModification {
/**
* Sets all int fields in an object to 0.
*
* @param obj
* The object to operate on.
*
* @throws RuntimeException
* If there is a reflection problem.
*/
public static void initIntFields(final Object obj) {
try {
Field[] fields = obj.getClass().getDeclaredFields();
for (int idx = 0; idx < fields.length; idx++) {
if (fields[idx].getType() == int.class) {
fields[idx].setAccessible(true);
fields[idx].setInt(obj, 0);
}
}
} catch (final IllegalAccessException ex) {
throw new RuntimeException(ex);
}
}
/**
* Demo Method.
*
* @param args
* Command line arguments.
*/
public static final void main(final String[] args) {
Integer value = new Integer("123");
System.out.println("Before: " + value);
initIntFields(value);
System.out.println("After: " + value);
}
}
/* ########## End of File ########## */