Add SlotFurnaceResult for diff visibility

src/main/java/net/minecraft/server/SlotFurnaceResult.java

@@ -0,0 +1,69 @@
+package net.minecraft.server;
+
+public class SlotFurnaceResult extends Slot {
+
+    private EntityHuman a;
+    private int b;
+
+    public SlotFurnaceResult(EntityHuman entityhuman, IInventory iinventory, int i, int j, int k) {
+        super(iinventory, i, j, k);
+        this.a = entityhuman;
+    }
+
+    public boolean isAllowed(ItemStack itemstack) {
+        return false;
+    }
+
+    public ItemStack a(int i) {
+        if (this.d()) {
+            this.b += Math.min(i, this.getItem().count);
+        }
+
+        return super.a(i);
+    }
+
+    public void a(EntityHuman entityhuman, ItemStack itemstack) {
+        this.b(itemstack);
+        super.a(entityhuman, itemstack);
+    }
+
+    protected void a(ItemStack itemstack, int i) {
+        this.b += i;
+        this.b(itemstack);
+    }
+
+    protected void b(ItemStack itemstack) {
+        itemstack.a(this.a.world, this.a, this.b);
+        if (!this.a.world.isStatic) {
+            int i = this.b;
+            float f = RecipesFurnace.getInstance().c(itemstack.id);
+            int j;
+
+            if (f == 0.0F) {
+                i = 0;
+            } else if (f < 1.0F) {
+                j = MathHelper.d((float) i * f);
+                if (j < MathHelper.f((float) i * f) && (float) Math.random() < (float) i * f - (float) j) {
+                    ++j;
+                }
+
+                i = j;
+            }
+
+            while (i > 0) {
+                j = EntityExperienceOrb.getOrbValue(i);
+                i -= j;
+                this.a.world.addEntity(new EntityExperienceOrb(this.a.world, this.a.locX, this.a.locY + 0.5D, this.a.locZ + 0.5D, j));
+            }
+        }
+
+        this.b = 0;
+        if (itemstack.id == Item.IRON_INGOT.id) {
+            this.a.a((Statistic) AchievementList.k, 1);
+        }
+
+        if (itemstack.id == Item.COOKED_FISH.id) {
+            this.a.a((Statistic) AchievementList.p, 1);
+        }
+    }
+}