1 files changed, 12 insertions, 10 deletions
diff --git a/src/main/java/gregtech/loaders/misc/GT_Achievements.java b/src/main/java/gregtech/loaders/misc/GT_Achievements.java
index c02743270c..ed02167284 100644
--- a/src/main/java/gregtech/loaders/misc/GT_Achievements.java
+++ b/src/main/java/gregtech/loaders/misc/GT_Achievements.java
@@ -1,9 +1,5 @@
 package gregtech.loaders.misc;
 
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-
 import cpw.mods.fml.common.FMLCommonHandler;
 import cpw.mods.fml.common.Loader;
 import cpw.mods.fml.common.eventhandler.SubscribeEvent;
@@ -33,20 +29,25 @@ import net.minecraftforge.event.entity.player.EntityItemPickupEvent;
 import net.minecraftforge.fluids.FluidStack;
 import thaumcraft.api.ThaumcraftApiHelper;
 
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.ConcurrentHashMap;
+
 public class GT_Achievements {
 
     public static List<Materials> oreList = new ArrayList<Materials>();
     public static List<Integer[]> oreStats = new ArrayList<Integer[]>();
     public static int oreReg = -1;
-    public HashMap<String, Achievement> achievementList;
-    public HashMap<String, Boolean> issuedAchievements;
+    public ConcurrentHashMap<String, Achievement> achievementList;
+    public ConcurrentHashMap<String, Boolean> issuedAchievements;
     public int adjX = 5;
     public int adjY = 9;
 
     public GT_Achievements() {
-        this.achievementList = new HashMap();
-        this.issuedAchievements = new HashMap();
-        for (int i = 0; i < oreList.size(); i++) {
+        this.achievementList = new ConcurrentHashMap();
+        this.issuedAchievements = new ConcurrentHashMap();
+        int oreList_sS=oreList.size();
+        for (int i = 0; i < oreList_sS; i++) {
             if (GT_Values.D1 && this.achievementList.get(oreList.get(i).name()) == null) {
                 GT_Log.out.println("achievement." + oreList.get(i).name() + "=Find " + oreList.get(i).name() + " Ore");
 
@@ -497,7 +498,8 @@ public class GT_Achievements {
                 }
             } else if (data.mPrefix == OrePrefixes.ore || data.mPrefix == OrePrefixes.oreBlackgranite || data.mPrefix == OrePrefixes.oreEndstone
                     || data.mPrefix == OrePrefixes.oreNetherrack || data.mPrefix == OrePrefixes.oreRedgranite) {
-                for (int i = 0; i < data.getAllMaterialStacks().size(); i++) {
+                int data_getAllMaterialStacks_sS=data.getAllMaterialStacks().size();
+                for (int i = 0; i < data_getAllMaterialStacks_sS; i++) {
                     issueAchievement(player, data.getAllMaterialStacks().get(i).mMaterial.name());
                     if (data.getAllMaterialStacks().get(i).mMaterial == Materials.AnyIron) {
                         issueAchievement(player, "iron");