Java if/else behaving strangely

Question

I\'m a real newbie to java, so please excuse me if this is a hopelessly straightforward problem.

I have the following from my java game server:

// Get in         


        

Answer 1

There are a number of problems with your code

• in.readLine().trim() readLine do returns null and calling null.trim() will result in ... NullPointerException
• Is there a reason to append EOF to every response you send.
• calling substring without making sure it has at least that much elements will throw StringIndexOutOfBoundsException if it is shorter.

Are you testing with "P" for example?