什麼是@SuppressWarnings（「deprecation」）以及如何修復它？

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我正在關注YouTube教程，並且遇到了此錯誤。什麼是@SuppressWarnings（「deprecation」）以及如何修復它？

在這一行，@SuppressWarnings("deprecation")出現。

Player targerPlayer = Bukkit.getServer().getPlayer(args[0]);

這是我的簡單癒合插件。

package me.roofer.youtube; 

import java.util.logging.Logger; 

import org.bukkit.Bukkit; 
import org.bukkit.ChatColor; 
import org.bukkit.command.Command; 
import org.bukkit.command.CommandSender; 
import org.bukkit.entity.Player; 
import org.bukkit.plugin.PluginDescriptionFile; 
import org.bukkit.plugin.java.JavaPlugin; 

public class youtube extends JavaPlugin { 
    public static Logger logger = Logger.getLogger("Minecraft"); 
    public static youtube plugin; 

    @Override 
    public void onDisable() { 
     PluginDescriptionFile pdfFile = this.getDescription(); 
     youtube.logger.info(pdfFile.getName() + " has been disabled!"); 
    } 
    @Override 
    public void onEnable() { 
     PluginDescriptionFile pdfFile = this.getDescription(); 
     youtube.logger.info(pdfFile.getName() + " Version" + pdfFile.getVersion() + " has been Enabled!"); 

    public boolean onCommand(CommandSender sender, Command cmd, String commandLabel, String[] args){ 
     @SuppressWarnings("unused") 
     Player player = (Player) sender; 
     if(commandLabel.equalsIgnoreCase("heal") || commandLabel.equalsIgnoreCase("h")) { 
      // heal >> 0 args | heal roofer777 >> 1 arg 
      if (args.length == 0){ 
       player.setHealth(20); 
       player.sendMessage(ChatColor.RED + "Healed!"); 
      }else if(args.length == 1){ 
       @SuppressWarnings({"unused", "deprecation"}) 
       Player targerPlayer = Bukkit.getServer().getPlayer(args[0]); 
       targetPlayer.setHealth(20); 
      } 
     } 
     return false; 
    } 
}

來源

2014-12-05 Marc Morton

這意味着您不應該使用不推薦使用的方法，並且IDE告訴您Java對於該程序有更好的選擇 – Jeeter 2014-12-06 15:22:25