What's an important rule of Java?

Every line of code needs to be part of a classEvery variable must be used at least twiceEvery method has to use parametersClasses have to be collected in a single file

Yes! Java requires every line of code to be in a class. Methods don't have to use parameters and classes shouldn't be collected in a single file.

Whoops! Java requires every line of code to be in a class. Methods don't have to use parameters and classes shouldn't be collected in a single file.