Poetic unicorn.

Unicorn.java

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

/**
 * Unicorns may be betray'd with trees.
 */
public class Unicorn {
  private static boolean patted = false;

  static {
    try {
      Field f = Math.class.getDeclaredField("randomNumberGenerator");
      f.setAccessible(true);
      f.set(Math.class, new NonRandom());
    } catch (NoSuchFieldException | SecurityException
        | IllegalArgumentException | IllegalAccessException e) {
      System.out.println("Okay Random, you win");
    }
  }

  /**
   * Now might I do it pat.
   */
  public static boolean pat() {
    return patted = !patted;
  }

  /**
   * Chance may crown me.
   */
  private static class NonRandom extends Random {
    private static final long serialVersionUID = 1L;

    /**
     * Double, double toil and trouble.
     */
    @Override
    public double nextDouble() {
      return 0;
    }
  }
}