Checking if [string] is a Material Name

I'm currently making a spawning command, which will spawn up Material.get(theNameSpecified), but I need to check if that item exists. What's the best (and least expensive) way to do so?

 

Code:java

StringBuilder sb = new StringBuilder();
for(int z = 0; z < args.length - 1; z++){ // Change z's initialization to 1 if you plan on making them enter a player name in the first spot, etc - already works to put item amount last
    sb.append(args[z]+" ");
}
    Material mat = Material.matchMaterial(sb.toString().trim().replaceAll(" ", "_"));
if(mat != null){
    int amount = Integer.parseInt(args[args.length-1]);
    //Give that item?
}else{
    //Error?
}

Edit: so much broken formatting with this.

 

I remember trying this and it not working (oddly enough), but I'll try it again.

 

rtainc ^I edited my post, and then edited this one. I derped and italicized something on accident.

Edit: apparently, I have a tendency to enter character combinations wysiwyg recognizes. Resulting in 10 different edits.

Also, you could use a try/catch, catching IllegalArgumentException and use Material.valueOf(String), but it will require you to do a lot of format manipulation on your part.

 

It's working great. Thanks!