Sometimes, when a player logs onto a server, the scoreboard is not properly sent. This can result in a client-side NullPointerException when the Scoreboard display slot is set for an objective already in that exact same slot. Here is an example stacktrace:
java.lang.NullPointerException
at arj.k(SourceFile:133)
at bdl.a(SourceFile:1086)
at fc.a(SourceFile:43)
at ci.b(SourceFile:350)
at bdl.d(SourceFile:95)
| @echo off | |
| color 0a | |
| SETLOCAL ENABLEEXTENSIONS | |
| if errorlevel 1 echo this shouldnt happen | |
| SETLOCAL ENABLEDELAYEDEXPANSION | |
| if errorlevel 1 echo this shouldnt happen | |
| set execdir=%0 | |
| ::you have to change more than the two numbers below to change number of mod slots | |
| set modmin=1 | |
| set modmax=9 |
| package test; | |
| import org.bukkit.plugin.java.JavaPlugin; | |
| import org.bukkit.event.Listener; | |
| import org.bukkit.event.EventHandler; | |
| import org.bukkit.event.player.PlayerKickEvent; | |
| import org.bukkit.event.player.PlayerQuitEvent; | |
| public class TestPlugin extends JavaPlugin implements Listener { | |
| public void onEnable() { |
| package test; | |
| import org.bukkit.plugin.java.JavaPlugin; | |
| import org.bukkit.event.Listener; | |
| import org.bukkit.event.EventHandler; | |
| import org.bukkit.event.inventory.InventoryPaintEvent; | |
| public class TestPlugin extends JavaPlugin implements Listener { | |
| public void onEnable() { | |
| getServer().getPluginManager().registerEvents((Listener)this, (JavaPlugin)this); |
| Add events for new inventory features in 1.5 | |
| This commit brings the InventoryClickEvent in line with the new Minecraft changes in 1.5. | |
| InventoryDragEvent (thanks to @YLivay for his PR) is added to represent the new "dragging" or "painting" | |
| functionality, where if you hold an itemstack and click-drag over several slots, the items will be split | |
| evenly (left click) or 1 each (right click). The InventoryAction enum is used for all the other new | |
| actions. | |
| Additionally, handling of creative inventory editing is improved with InventoryCreativeEvent, and | |
| handling of numberkey presses is also improved within InventoryClickEvent and CraftItemEvent. |
| public enum InventoryAction { | |
| /** | |
| * left / right: cursor / current are different | |
| */ | |
| SWAP, | |
| /** | |
| * right: cursor not empty, current is same material or empty and not full | |
| * rightdrag: only one slot | |
| */ | |
| PLACE_ONE, |
| if (clickedItem.doMaterialsMatch(cursor) && ItemStack.equals(clickedItem, cursor)) { | |
| int toPlace = packet102windowclick.button == 0 ? clickedItem.count : 1; | |
| toPlace = Math.min(toPlace, clickedItem.count - cursor.count); | |
| toPlace = Math.min(toPlace, clickedItem.getMaxStackSize() - cursor.count); | |
| toPlace = Math.min(toPlace, slot.inventory.getMaxStackSize() - cursor.count); | |
| if (toPlace == 1) { | |
| action = InventoryAction.PLACE_ONE; | |
| } else if (toPlace == cursor.count) { | |
| action = InventoryAction.PLACE_ALL; | |
| } else if (toPlace <= 0) { |
| 1. Server sends public key to client | |
| - Call this EB | |
| 2. Client generates random number | |
| - Call this random number RA | |
| - Call client's name IA | |
| 3. Client computes EB(IA, RA) and sends to server | |
| 4. Server uses IA to look up EA | |
| 5. Server generates random number | |
| - Call this random number RB | |
| 6. Server computes session key |
| public void checkSession() throws ExceptionWorldConflict { // CraftBukkit - throws ExceptionWorldConflict | |
| try { | |
| File file1 = new File(this.baseDir, "session.lock"); | |
| DataInputStream datainputstream = new DataInputStream(new FileInputStream(file1)); | |
| try { | |
| if (datainputstream.readLong() != this.sessionId) { | |
| throw new ExceptionWorldConflict("The save is being accessed from another location, aborting"); | |
| } | |
| } finally { |