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Change private static final field using java reflection

/ Published in: Java
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  1. import java.lang.reflect.*;
  2.  
  3. public class EverythingIsTrue {
  4.    static void setFinalStatic(Field field, Object newValue) throws Exception {
  5.       field.setAccessible(true);
  6.  
  7.       Field modifiersField = Field.class.getDeclaredField("modifiers");
  8.       modifiersField.setAccessible(true);
  9.       modifiersField.setInt(field, field.getModifiers() & ~Modifier.FINAL);
  10.  
  11.       field.set(null, newValue);
  12.    }
  13.    public static void main(String args[]) throws Exception {      
  14.       setFinalStatic(Boolean.class.getField("FALSE"), true);
  15.  
  16.       System.out.format("Everything is %s", false); // "Everything is true"
  17.    }
  18. }

URL: http://stackoverflow.com/questions/3301635/change-private-static-final-field-using-java-reflection

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