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That's what I was trying to get him to find for himself by stepping through it with a debugger or adding print statements. Ah well.

Ah, so it's a NullPointerException. Now your job is to figure out what's null in that line. It could either be jPanel1 or b[0], right? So what is the value of each? Are you sure? Step through it with...

You still haven't posted the actual error- what is the actual Exception? You also haven't used highlight tags, which makes your code pretty hard to read.

Hint: What is the value of each element of...

What line is the error on? What is happening on that line? Something must be null there- where do you initialize each of the variables you're dereferencing?