GUI example won't work

[dlorde]

Error message reads like this:

Exception in thread "main" java.lang.NoClassDefFoundError: TextDemo (wrong name:
components/TextDemo)
...
Could not find the main class: TextDemo. Program will exit.

OK, you didn't answer my question about how you ran it, which isn't very helpful, but I'll take a guess anyway...

The TextDemo class is in package directory 'components', so its fully qualified name is 'components.TextDemo', but I'm guessing you told it to run just 'TextDemo' instead, from inside the 'components' directory. The runtime read the TextDemo class, saw the 'components' package declaration and realised the name was wrong. When you run classes, you should run them from the directory that contains the root package directory, and specify the fully qualified name (i.e. include the package or packages in the name).

This is very basic stuff - I recommend you learn about packages and how to run a Java program with java.exe.

Unless in communicating with it [a computer] one says exactly what one means, trouble is bound to result...
A. Turing