how to write to java file in the best way?

How do I make my Java program write which line of the input file is invalid onto the error file?

• How do I make my Java program write which line of the input file is invalid onto the error file? For example if the first line doesn't satisfy requirements which are balance has to be at least 50 and account numbers have to be different. Here is my BankAccount class: http://pastebin.com/m67194483 And here is my CustomerReport class (what I need help with): http://pastebin.com/m70bd83ae My problem is that I want the error file to output this: http://pastebin.com/m3205061b and currently; I have the error file with the following contents: http://pastebin.com/m52385cd7

• Answer:

  If you want custom exceptions, you have to write them. If you want Objects with behaviors, you may have to re-engineer your hierarchy. I've done this student assignment so many different ways. I don't know what level of expertise you are allowed to demonstrate. //>========= abstract Account Savings extends Account Checking extends Account class Customer implements Transaction interface Transaction class Bank implements Transaction