File list (Check if you may need any files):
Calculator
..........\.idea
..........\.....\.name
..........\.....\codeStyleSettings.xml
..........\.....\compiler.xml
..........\.....\copyright
..........\.....\.........\profiles_settings.xml
..........\.....\encodings.xml
..........\.....\misc.xml
..........\.....\modules.xml
..........\.....\scopes
..........\.....\......\scope_settings.xml
..........\.....\uiDesigner.xml
..........\.....\vcs.xml
..........\.....\workspace.xml
..........\Calculator.iml
..........\calculator.jpg
..........\out
..........\...\production
..........\...\..........\Calculator
..........\...\..........\..........\Calculator$Police.class
..........\...\..........\..........\Calculator.class
..........\...\..........\..........\MyButton.class
..........\...\..........\..........\Run.class
..........\src
..........\...\Calculator.java
..........\...\MyButton.java
..........\...\Run.java