Finally the 0.2 release

src/main/java/pers/towdium/justEnoughCalculation/event/PlayerEventHandler.java

@@ -1,19 +1,32 @@
 package pers.towdium.justEnoughCalculation.event;
 
+import net.minecraftforge.event.entity.player.ItemTooltipEvent;
 import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
 import pers.towdium.justEnoughCalculation.JustEnoughCalculation;
+import net.minecraftforge.event.entity.player.PlayerEvent.*;
+import pers.towdium.justEnoughCalculation.gui.guis.calculator.ContainerCalculator;
 
 /**
  * @author Towdium
  */
 public class PlayerEventHandler {
     @SubscribeEvent
-    public void onLogin(net.minecraftforge.event.entity.player.PlayerEvent.LoadFromFile event){
+    public void onLogin(LoadFromFile event){
         JustEnoughCalculation.proxy.getPlayerHandler().handleLogin(event);
     }
 
     @SubscribeEvent
-    public void onSave(net.minecraftforge.event.entity.player.PlayerEvent.SaveToFile event){
+    public void onSave(SaveToFile event){
         JustEnoughCalculation.proxy.getPlayerHandler().handleSave(event);
     }
+
+    @SubscribeEvent
+    public void onTooltip(ItemTooltipEvent event){
+        if(event.entityPlayer.openContainer instanceof ContainerCalculator){
+            long l = event.itemStack.hasTagCompound() ? (event.itemStack.getTagCompound().getLong("amount")+99)/100 : 0;
+            if(l > 999){
+                event.toolTip.add("Amount: " + l);
+            }
+        }
+    }
 }