Java tutorial
package me.totalfreedom.totalfreedommod.util; import java.io.File; import java.io.FileFilter; import java.lang.reflect.Field; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Arrays; import java.util.Calendar; import java.util.Date; import java.util.GregorianCalendar; import java.util.HashMap; import java.util.List; import java.util.Locale; import java.util.Map; import java.util.Random; import java.util.Set; import java.util.regex.Matcher; import java.util.regex.Pattern; import me.totalfreedom.totalfreedommod.config.ConfigEntry; import org.apache.commons.io.FileUtils; import org.apache.commons.lang3.StringUtils; import org.bukkit.Bukkit; import org.bukkit.ChatColor; import org.bukkit.Location; import org.bukkit.OfflinePlayer; import org.bukkit.command.CommandSender; import org.bukkit.entity.Player; import org.bukkit.scheduler.BukkitTask; public class FUtil { private static final Random RANDOM = new Random(); // public static final String SAVED_FLAGS_FILENAME = "savedflags.dat"; // See https://github.com/TotalFreedom/License - None of the listed names may be removed. public static final List<String> DEVELOPERS = Arrays.asList("Madgeek1450", "Prozza", "Wild1145", "WickedGamingUK"); public static String DATE_STORAGE_FORMAT = "EEE, d MMM yyyy HH:mm:ss Z"; public static final Map<String, ChatColor> CHAT_COLOR_NAMES = new HashMap<>(); public static final List<ChatColor> CHAT_COLOR_POOL = Arrays.asList(ChatColor.DARK_BLUE, ChatColor.DARK_GREEN, ChatColor.DARK_AQUA, ChatColor.DARK_RED, ChatColor.DARK_PURPLE, ChatColor.GOLD, ChatColor.BLUE, ChatColor.GREEN, ChatColor.AQUA, ChatColor.RED, ChatColor.LIGHT_PURPLE, ChatColor.YELLOW); static { for (ChatColor chatColor : CHAT_COLOR_POOL) { CHAT_COLOR_NAMES.put(chatColor.name().toLowerCase().replace("_", ""), chatColor); } } private FUtil() { } public static void cancel(BukkitTask task) { if (task == null) { return; } try { task.cancel(); } catch (Exception ex) { } } public static void bcastMsg(String message, ChatColor color) { FLog.info(message, true); for (Player player : Bukkit.getOnlinePlayers()) { player.sendMessage((color == null ? "" : color) + message); } } public static void bcastMsg(String message) { FUtil.bcastMsg(message, null); } // Still in use by listeners public static void playerMsg(CommandSender sender, String message, ChatColor color) { sender.sendMessage(color + message); } // Still in use by listeners public static void playerMsg(CommandSender sender, String message) { FUtil.playerMsg(sender, message, ChatColor.GRAY); } public static void setFlying(Player player, boolean flying) { player.setAllowFlight(true); player.setFlying(flying); } public static void adminAction(String adminName, String action, boolean isRed) { FUtil.bcastMsg(adminName + " - " + action, (isRed ? ChatColor.RED : ChatColor.AQUA)); } public static String formatLocation(Location location) { return String.format("%s: (%d, %d, %d)", location.getWorld().getName(), Math.round(location.getX()), Math.round(location.getY()), Math.round(location.getZ())); } public static boolean deleteFolder(final File file) { if (file.exists() && file.isDirectory()) { return FileUtils.deleteQuietly(file); } return false; } public static void deleteCoreDumps() { final File[] coreDumps = new File(".").listFiles(new FileFilter() { @Override public boolean accept(File file) { return file.getName().startsWith("java.core"); } }); for (File dump : coreDumps) { FLog.info("Removing core dump file: " + dump.getName()); dump.delete(); } } public static Date parseDateOffset(String time) { Pattern timePattern = Pattern.compile("(?:([0-9]+)\\s*y[a-z]*[,\\s]*)?" + "(?:([0-9]+)\\s*mo[a-z]*[,\\s]*)?" + "(?:([0-9]+)\\s*w[a-z]*[,\\s]*)?" + "(?:([0-9]+)\\s*d[a-z]*[,\\s]*)?" + "(?:([0-9]+)\\s*h[a-z]*[,\\s]*)?" + "(?:([0-9]+)\\s*m[a-z]*[,\\s]*)?" + "(?:([0-9]+)\\s*(?:s[a-z]*)?)?", Pattern.CASE_INSENSITIVE); Matcher m = timePattern.matcher(time); int years = 0; int months = 0; int weeks = 0; int days = 0; int hours = 0; int minutes = 0; int seconds = 0; boolean found = false; while (m.find()) { if (m.group() == null || m.group().isEmpty()) { continue; } for (int i = 0; i < m.groupCount(); i++) { if (m.group(i) != null && !m.group(i).isEmpty()) { found = true; break; } } if (found) { if (m.group(1) != null && !m.group(1).isEmpty()) { years = Integer.parseInt(m.group(1)); } if (m.group(2) != null && !m.group(2).isEmpty()) { months = Integer.parseInt(m.group(2)); } if (m.group(3) != null && !m.group(3).isEmpty()) { weeks = Integer.parseInt(m.group(3)); } if (m.group(4) != null && !m.group(4).isEmpty()) { days = Integer.parseInt(m.group(4)); } if (m.group(5) != null && !m.group(5).isEmpty()) { hours = Integer.parseInt(m.group(5)); } if (m.group(6) != null && !m.group(6).isEmpty()) { minutes = Integer.parseInt(m.group(6)); } if (m.group(7) != null && !m.group(7).isEmpty()) { seconds = Integer.parseInt(m.group(7)); } break; } } if (!found) { return null; } Calendar c = new GregorianCalendar(); if (years > 0) { c.add(Calendar.YEAR, years); } if (months > 0) { c.add(Calendar.MONTH, months); } if (weeks > 0) { c.add(Calendar.WEEK_OF_YEAR, weeks); } if (days > 0) { c.add(Calendar.DAY_OF_MONTH, days); } if (hours > 0) { c.add(Calendar.HOUR_OF_DAY, hours); } if (minutes > 0) { c.add(Calendar.MINUTE, minutes); } if (seconds > 0) { c.add(Calendar.SECOND, seconds); } return c.getTime(); } public static String playerListToNames(Set<OfflinePlayer> players) { List<String> names = new ArrayList<>(); for (OfflinePlayer player : players) { names.add(player.getName()); } return StringUtils.join(names, ", "); } public static String dateToString(Date date) { return new SimpleDateFormat(DATE_STORAGE_FORMAT, Locale.ENGLISH).format(date); } public static Date stringToDate(String dateString) { try { return new SimpleDateFormat(DATE_STORAGE_FORMAT, Locale.ENGLISH).parse(dateString); } catch (ParseException pex) { return new Date(0L); } } public static boolean isFromHostConsole(String senderName) { return ConfigEntry.HOST_SENDER_NAMES.getList().contains(senderName.toLowerCase()); } public static boolean fuzzyIpMatch(String a, String b, int octets) { boolean match = true; String[] aParts = a.split("\\."); String[] bParts = b.split("\\."); if (aParts.length != 4 || bParts.length != 4) { return false; } if (octets > 4) { octets = 4; } else if (octets < 1) { octets = 1; } for (int i = 0; i < octets && i < 4; i++) { if (aParts[i].equals("*") || bParts[i].equals("*")) { continue; } if (!aParts[i].equals(bParts[i])) { match = false; break; } } return match; } public static String getFuzzyIp(String ip) { final String[] ipParts = ip.split("\\."); if (ipParts.length == 4) { return String.format("%s.%s.*.*", ipParts[0], ipParts[1]); } return ip; } //getField: Borrowed from WorldEdit @SuppressWarnings("unchecked") public static <T> T getField(Object from, String name) { Class<?> checkClass = from.getClass(); do { try { Field field = checkClass.getDeclaredField(name); field.setAccessible(true); return (T) field.get(from); } catch (NoSuchFieldException | IllegalAccessException ex) { } } while (checkClass.getSuperclass() != Object.class && ((checkClass = checkClass.getSuperclass()) != null)); return null; } public static ChatColor randomChatColor() { return CHAT_COLOR_POOL.get(RANDOM.nextInt(CHAT_COLOR_POOL.size())); } public static String colorize(String string) { return ChatColor.translateAlternateColorCodes('&', string); } public static Date getUnixDate(long unix) { return new Date(unix * 1000); } public static long getUnixTime() { return System.currentTimeMillis() / 1000L; } public static long getUnixTime(Date date) { if (date == null) { return 0; } return date.getTime() / 1000L; } public static String getNmsVersion() { String packageName = Bukkit.getServer().getClass().getPackage().getName(); return packageName.substring(packageName.lastIndexOf('.') + 1); } }