Baby Zombie Chicken Jockey Java Minecraft Mod

June 24, 2022

You can spawn a random amount of chicken jockeys with the third Minecraft mod from “Absolute Beginner’s Guide To Minecraft Mods Programming, second edition” by Rogers Cadenhead.

Demo of the /zombiepig command

Challenges

1. Can you create a “/zombiepig” command that generates pig-riding zombie-pigmen?

In the onCommand method add an if-else statement for if (label.equalsIgnoreCase("zombiepig")) then call a new method named executeZombiePigCommand(sender). You can copy/paste the executeCommand method and just change the title to executeZombiePigCommand. Next, update the line that says Chicken clucky = world.spawn(chickenSpot, Chicken.class); so that it will spawn an instance of the Pig class and save it a variable type Pig (you can still use the variable name clucky if you want). Finally, update the line that says Zombie rob = world.spawn(chickenSpot, Zombie.class); so that it spawns an instance of the PigZombie class and saves it in a variable type PigZombie.

2. Can you create a “/villagersheep” command that generates random-color sheep with villager jockeys?

In the onCommand method add an if-else statement for if (label.equalsIgnoreCase("villagersheep")) then call a new method named executeVillagerSheepCommand(sender). You can copy/paste the executeCommand method and just change the title to executeVillagerSheepCommand. First, make it spawn an instance of the Sheep class and save it a variable type Sheep (you can still use the variable name clucky if you want). Next, make it spawn an instance of the Villager class and saves it in a variable type Villager. Look at the Spigot API for the Villager class and find the setBaby method. Notice that unlike the setBaby method for the Zombie class, this method does NOT require any arguments. Finally, look at the Spigot API for the Sheep class and the DyeColor class in order to create an array of type DyeColor that contains several colors, randomly select a DyeColor from the list, and set the sheep’s wool color.

3. Can you generate a “normal distribution” of chicken jockeys?

A normal distribution (also known as a bell curve) will expect that median values are more likely and extreme values are less likely. Consider rolling two dice. You have about a 44% change of rolling a 6, 7, or 8, but you only have about a 3% chance of rolling a 12. We would simulate rolling two dice in Java like this (int) (Math.random() * 6 + 1) + (int) (Math.random() * 6 + 1) and we would get a bell curve of values ranging from 2 to 12. How can you change that code to generate a bell curve of values ranging from 8 to 16?

Demo of the /villagersheep command

ZombieChicken Starter Code

Source: https://javaminecraft.com/source/ZombieChicken/ZombieChicken.java

package com.javaminecraft;

import java.util.logging.Logger;
import org.bukkit.Location;
import org.bukkit.World;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Chicken;
import org.bukkit.entity.Player;
import org.bukkit.entity.Zombie;
import org.bukkit.plugin.java.JavaPlugin;
import org.bukkit.potion.PotionEffect;
import org.bukkit.potion.PotionEffectType;

public class ZombieChicken extends JavaPlugin {
    public static final Logger LOG = Logger.getLogger("Minecraft");

    @Override
    public boolean onCommand(CommandSender sender, Command command,
        String label, String[] arguments) {

        if (label.equalsIgnoreCase("zombiechicken")) {
            if (sender instanceof Player) {
                executeCommand(sender);
                return true;
            }            
        }
        return false;
    }

    public void executeCommand(CommandSender sender) {
        Player me = (Player) sender;
        Location spot = me.getLocation();
        World world = me.getWorld();

        // spawn 1-10 chicken-riding zombies
        int quantity = (int) (Math.random() * 10) + 1;
        for (int i = 0; i < quantity; i++) {
            // set chicken and zombie location
            Location chickenSpot = new Location(world,
                spot.getX() + (Math.random() * 15),
                spot.getY() + 5,
                spot.getZ() + (Math.random() * 15));
            // create the mobs
            Chicken clucky = world.spawn(chickenSpot, Chicken.class);
            Zombie rob = world.spawn(chickenSpot, Zombie.class);
            rob.setBaby(true);
            clucky.setPassenger(rob);
            // increase the chicken's speed
            int speed = (int) (Math.random() * 10);
            PotionEffect potion = new PotionEffect(
                PotionEffectType.SPEED,
                Integer.MAX_VALUE,
                speed);
            clucky.addPotionEffect(potion);
        }
        LOG.info("[ZombieChicken] Created " + quantity + " chicken-riding zombies");
    }
}




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