Some performance or memory optimizations

Replaced String concat in loops with StringBuilder (performance)
Replaced for with keySet + Map.get() through for with entrySet (perf)
Changed inner classes to static classes, mostly struct like (memory)

src/main/java/appeng/recipes/game/ShapedRecipe.java

@@ -31,10 +31,11 @@ public class ShapedRecipe implements IRecipe, IRecipeBakeable
 		return !disable;
 	}
 
-	public ShapedRecipe(ItemStack result, Object... recipe) {
+	public ShapedRecipe(ItemStack result, Object... recipe)
+	{
 		output = result.copy();
 
-		String shape = "";
+		StringBuilder shape = new StringBuilder();
 		int idx = 0;
 
 		if ( recipe[idx] instanceof Boolean )
@@ -57,7 +58,7 @@ public class ShapedRecipe implements IRecipe, IRecipeBakeable
 			for (String s : parts)
 			{
 				width = s.length();
-				shape += s;
+				shape.append( s );
 			}
 
 			height = parts.length;
@@ -67,7 +68,7 @@ public class ShapedRecipe implements IRecipe, IRecipeBakeable
 			while (recipe[idx] instanceof String)
 			{
 				String s = (String) recipe[idx++];
-				shape += s;
+				shape.append( s );
 				width = s.length();
 				height++;
 			}
@@ -75,13 +76,13 @@ public class ShapedRecipe implements IRecipe, IRecipeBakeable
 
 		if ( width * height != shape.length() )
 		{
-			String ret = "Invalid shaped ore recipe: ";
+			StringBuilder ret = new StringBuilder( "Invalid shaped ore recipe: " );
 			for (Object tmp : recipe)
 			{
-				ret += tmp + ", ";
+				ret.append( tmp + ", " );
 			}
-			ret += output;
-			throw new RuntimeException( ret );
+			ret.append( output );
+			throw new RuntimeException( ret.toString() );
 		}
 
 		HashMap<Character, Object> itemMap = new HashMap<Character, Object>();
@@ -97,19 +98,19 @@ public class ShapedRecipe implements IRecipe, IRecipeBakeable
 			}
 			else
 			{
-				String ret = "Invalid shaped ore recipe: ";
+				StringBuilder ret = new StringBuilder( "Invalid shaped ore recipe: " );
 				for (Object tmp : recipe)
 				{
-					ret += tmp + ", ";
+					ret.append( tmp + ", " );
 				}
-				ret += output;
-				throw new RuntimeException( ret );
+				ret.append( output );
+				throw new RuntimeException( ret.toString() );
 			}
 		}
 
 		input = new Object[width * height];
 		int x = 0;
-		for (char chr : shape.toCharArray())
+		for (char chr : shape.toString().toCharArray())
 		{
 			input[x++] = itemMap.get( chr );
 		}

src/main/java/appeng/recipes/game/ShapelessRecipe.java

@@ -24,7 +24,8 @@ public class ShapelessRecipe implements IRecipe, IRecipeBakeable
 		return !disable;
 	}
 
-	public ShapelessRecipe(ItemStack result, Object... recipe) {
+	public ShapelessRecipe(ItemStack result, Object... recipe)
+	{
 		output = result.copy();
 		for (Object in : recipe)
 		{
@@ -34,13 +35,13 @@ public class ShapelessRecipe implements IRecipe, IRecipeBakeable
 			}
 			else
 			{
-				String ret = "Invalid shapeless ore recipe: ";
+				StringBuilder ret = new StringBuilder( "Invalid shapeless ore recipe: " );
 				for (Object tmp : recipe)
 				{
-					ret += tmp + ", ";
+					ret.append( tmp + ", " );
 				}
-				ret += output;
-				throw new RuntimeException( ret );
+				ret.append( output );
+				throw new RuntimeException( ret.toString() );
 			}
 		}
 	}

src/main/java/appeng/recipes/handlers/Shaped.java

@@ -64,21 +64,21 @@ public class Shaped implements ICraftHandler, IWebsiteSerializer
 
 		for (int y = 0; y < rows; y++)
 		{
-			String row = "";
+			StringBuilder row = new StringBuilder();
 			for (int x = 0; x < cols; x++)
 			{
 				if ( inputs.get( y ).get( x ).isAir() )
-					row = row + " ";
+					row.append( " " );
 				else
 				{
-					row = row + first;
+					row.append( first );
 					args.add( first );
 					args.add( inputs.get( y ).get( x ) );
 
 					first++;
 				}
 			}
-			args.add( y, row );
+			args.add( y, row.toString() );
 		}
 
 		ItemStack outIS = output.getItemStack();

src/main/java/appeng/recipes/handlers/Shapeless.java

@@ -57,9 +57,10 @@ public class Shapeless implements ICraftHandler, IWebsiteSerializer
 			throw new RegistrationError( "Error while adding shapeless recipe." );
 		}
 	}
-	
+
 	@Override
-	public boolean canCraft(ItemStack reqOutput) throws RegistrationError, MissingIngredientError {
+	public boolean canCraft(ItemStack reqOutput) throws RegistrationError, MissingIngredientError
+	{
 
 		for (IIngredient i : inputs)
 		{
@@ -74,26 +75,27 @@ public class Shapeless implements ICraftHandler, IWebsiteSerializer
 				}
 			}
 		}
-		
-		return Platform.isSameItemPrecise( output.getItemStack(),reqOutput );
+
+		return Platform.isSameItemPrecise( output.getItemStack(), reqOutput );
 	}
 
 	@Override
-	public String getPattern( RecipeHandler h) {
-		String o = "shapeless "+output.getQty()+"\n";
+	public String getPattern(RecipeHandler h)
+	{
+		StringBuilder o = new StringBuilder( "shapeless " + output.getQty() + "\n" );
 
-		o += h.getName(output)+"\n";
-		
-		for ( int y = 0; y < inputs.size(); y++ )
+		o.append( h.getName( output ) + "\n" );
+
+		for (int y = 0; y < inputs.size(); y++)
 		{
-			IIngredient i = inputs.get(y);
+			IIngredient i = inputs.get( y );
 			if ( i.isAir() )
-				o += "air"+( y +1 == inputs.size() ? "\n" : " " );
+				o.append( "air" + (y + 1 == inputs.size() ? "\n" : " ") );
 			else
-				o += h.getName(i)+( y +1 == inputs.size() ? "\n" : " " );
+				o.append( h.getName( i ) + (y + 1 == inputs.size() ? "\n" : " ") );
 		}
-		
-		return o.trim();
+
+		return o.toString().trim();
 	}
-	
+
 }