This week's book giveaways are in the iOS and Features new in Java 8 forums. We're giving away four copies each of Barcodes with iOS: Bringing together the digital and physical worlds and Core Java for the Impatient and have the authors on-line! See this thread and this one for details.
I have posted this question on another site also since I am desperately looking for help in this issue. Im a beginner in Java and I have created the following program, where the operations is class which consists of different fields and acts like a struct in C. The code is as follows:
I get a nullpointexception error on the line for(operations o : obs.get(x)). Can anyone tell me what the problem is?