something wrong with null exception in I/O processing

[John Batista]

I have a code that should've worked, but didn't


What's the problem? thanks

[Stephan van Hulst]

c is null. System.console() doesn't return a console in your case.

John, next time please post actual code, instead of screenshots. It makes it easier for us to help you, and it reduces bandwidth needed.

[John Batista]

OK, so how do I make the console not null? thanks

[Stephan van Hulst]

By running your program from the command line, instead of from Eclipse.

[Rob Spoor]

Stephan is right. System.console() only returns a non-null value if it's actually run from the console. IDE's like Eclipse try to emulate a console but this is not the same, and therefore System.console() returns null.