Add Some Entropy to Your JVM

public int nextInt() {
  return 14;
}

import java.lang.reflect.Field;
import java.util.Random;

public class Entropy {
  public static void main(String[] args) 
  throws Exception {

    // Extract the IntegerCache through reflection
    Class<?> clazz = Class.forName(
      "java.lang.Integer$IntegerCache");
    Field field = clazz.getDeclaredField("cache");
    field.setAccessible(true);
    Integer[] cache = (Integer[]) field.get(clazz);

    // Rewrite the Integer cache
    for (int i = 0; i < cache.length; i++) {
      cache[i] = new Integer(
        new Random().nextInt(cache.length));
    }

    // Prove randomness
    for (int i = 0; i < 10; i++) {
      System.out.println((Integer) i);
    }
  }
}