Common Java Error Messages
Common Error Messages from the Compiler
While by no means exhaustive, we've listed a few error messages that
you might encounter early in the process and suggested some solutions.
The list is completely biased by what error messages we have seen in
our programming recently :-)
- Undefined variable
- You've referenced a variable that is not defined within the scope
that it is used. Check whether it is a typo or simply defined
- Wrong number of arguments in constructor
- In trying to create a new object, you've misused the
- Can't make a static reference to nonstatic variable
whatever in class yourclass
- You probably used a class name where you meant to use an object
- Variable whatever in class yourclass1 not accessible from class yourclass2
- Don't try to directly reference private instance variables.
- Undefined variable, class, or package name
- Check spelling and capitalization on the name being
used. Probably a typo.
Common Run-Time Errors
Again, we'll be keeping track of error messages that we've seen during
run-time with suggested solutions.
- Can't find class yourclass
- You've given java the wrong name for the class file; you're in the
wrong directory, or you haven't imported the classes needed by
yourclass to run.
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