大家好,我正在尝试将Main类中的变量用于Event Listener类。这是我正在使用的Minecraft Java Bukkit代码。我正在尝试从MainClass接收“CanRestart”静态布尔变量,并尝试在Event Listeners类中使用它。程序中没有弹出错误,但控制台中有错误,插件无法工作。
我知道问题是Event Listeners类中的这行代码(我创建该类是为了尝试从Main类中获取变量):
MainProgram MainCode = new MainProgram();
我对Java的OOP没有太多的知识,但我真的想知道是否可以得到帮助。
我想得到这样一个代码:
MainProgram MainCode = new MainProgram();
if(MainCode.CanRestart == true){
//We received a variable from the main class!
}
这是我的主要课程:
package me.Shadowsych;
import org.bukkit.Bukkit;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.plugin.java.JavaPlugin;
public class MainProgram extends JavaPlugin{
public static boolean CanRestart = true;
public int CDNumber = 5;
public int DetermineCounter;
@Override
public void onEnable(){ //Essential, when your plugin is enabled.
getLogger().info("Shadowsych's Command Plugin is working!"); //CMD will print this out.
new EventListeners(this); //Inherits the EventListeners class
}
@Override
public void onDisable(){//Essential, when your plugin is disabled.
}
@SuppressWarnings("deprecation")
public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args) { //Creates command function.
Player player = (Player) sender;
if(cmd.getName().equalsIgnoreCase("timer")){
if(CanRestart == true){ //Checks to see if the Timer is still running
CanRestart = false; //The timer has ran.
CDNumber = 5;
DetermineCounter = Bukkit.getServer().getScheduler().scheduleAsyncRepeatingTask(this, new Runnable(){
public void run(){
if(CDNumber > -1){ //This can be a 0 integer
if(!(CDNumber == 0)){ //If once it is 0.
player.sendMessage("" + CDNumber); //The "" is used to make number a String.
}
CDNumber --; //Makes the number -1 if it's already a 0.
}
if(CDNumber == -1){ //Now catches that the number is -1.
player.sendMessage("Count down finished");
Bukkit.getServer().getScheduler().cancelTask(DetermineCounter); //Disables counter.
CanRestart = true; //You can restart your timer now.
return;
}
}
}, 0L, 20L);
}
}
return false; //Is essential in a boolean function.
}
}
这是我的Event Listener类:
package me.Shadowsych;
import me.Shadowsych.MainProgram;
import org.bukkit.ChatColor;
import org.bukkit.GameMode;
import org.bukkit.Material;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.PlayerMoveEvent;
import org.bukkit.event.player.PlayerToggleFlightEvent;
public class EventListeners implements Listener {
MainProgram MainCode = new MainProgram();
public EventListeners(MainProgram plugin) {
plugin.getServer().getPluginManager().registerEvents(this, plugin); //Registers Event Main
}
@EventHandler
public void PlayerToggleFlight(PlayerToggleFlightEvent EventFloat){
Player player = EventFloat.getPlayer();
if(player.getGameMode() == GameMode.CREATIVE)
return; //If the player is creative then don't do this Event.
EventFloat.setCancelled(true);
player.setAllowFlight(false);
player.setVelocity(player.getLocation().getDirection().multiply(0).setY(1));
player.sendMessage(ChatColor.AQUA + "You have double jumped!");
}
@EventHandler
public void PlayerJump(PlayerMoveEvent EventJumped){
Player player = EventJumped.getPlayer();
if((player.getGameMode() != GameMode.CREATIVE) //Player is not creative
&& (player.getLocation().subtract(0, 1, 0).getBlock().getType() != Material.AIR) //Block beneath them is not air
&& (!player.isFlying())) //Player is not flying
{
player.setAllowFlight(true); //Allow the player to fly
}
}
}
下面是控制台的内容:
http://prntscr.com/9ki7a5