I have downloaded source code from the internet and i have the .java files and the jar files. Im using Blue J and when i try copying the .java files into Blue J and compiling it says im trying to change the package statement to a package that does not exist in this project. Where do i find the package, is it inside the jar files and what do i do with the package. Thanks.
The simplest answer is not to use BlueJ. It is not at all good at using packages.
Copying the files to BlueJ with the package statements (always at the beginning of the file) left out.
Copying and pasting the class files to a proper IDE (eg NetBeans, Eclipse), but you will have to set up packages with the same names as your package statements.
Using a text editor or JCreator, with the package statements left in.
You may need to compile the classes individually, using javac -d . MyClass.java then to run them use java packagename.ClassName for the class with the main method in. See whether any of those is helpful CR