New to java, need help with shaped recipes

I've looked at the javadoc for it, but I still don't understand how to define what items go in which rows in a recipe. If someone could help/provide example with little to no comment on my lack of programming skills I would be very grateful.

 

Here a bit of code

PHP:

// Recipe
        ShapedRecipe goldenApple = new ShapedRecipe( new ItemStack(Material.GOLDEN_APPLE, 1)).shape(new String[] { "ggg", "gag", "ggg" }).setIngredient('g', Material.GOLD_INGOT).setIngredient('a', Material.APPLE);
        plugin.getServer().addRecipe(goldenApple);

You can set a Material for a letter.

 

Thank you very much that was very helpful.

I'm now trying to set up a command so when you type in /recipe it'll say what recipes are loaded with this plugin, I have the code:

but when I load the plugin and type in "/recipe" it returns only:
/recipe

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

Did you add it to the plugin.yml?

 

yes

 

I want my players to be able to make sponge using 8 yellow wool and a bucket but how can I make ik so that they can only use yellow wool? Here is my code

Code:java

        ShapedRecipe sponge = new ShapedRecipe(new ItemStack(Material.SPONGE))
                .shape("***", "*%*", "***")
                .setIngredient('*', Material.WOOL)
                .setIngredient('%', Material.BUCKET);