1, under Eclipse, package, source folder, folder are folders. But they are distinguished as;
2. Package: When you build a package, it is automatically built into the source folder, it can only be built under this directory.
3. SOURCE folder: Folders that store Java source code, and of course include some package folders, and can also contain other files.
4. After the project is built, the Java in source folder is automatically compiled into a class file into the corresponding Bin folder, and the other files are moved to the corresponding directory.
5, folder: Can be placed in any file. Includes Java source files, jar files, other files (for example, pictures, sounds, etc.). Here I explain that if it contains Java source files, regardless of whether the program is correct, Eclipse will not error, Treat them as ordinary files. But if the project is to use the files in it, the situation will be different.
The difference between source Folder,package,folder in MyEclipse