File list (Check if you may need any files):
Calculator
..........\.classpath
..........\.project
..........\.settings
..........\.........\org.eclipse.jdt.core.prefs
..........\bin
..........\...\book
..........\...\....\gui
..........\...\....\...\Calculator.class
..........\...\....\...\JButton.class
..........\...\....\...\JFrame.class
..........\...\....\...\JTextField.class
..........\...\....\...\book.class
..........\src
..........\...\book
..........\...\....\gui
..........\...\....\...\Calculator.java
..........\...\....\...\JButton.java
..........\...\....\...\JFrame.java
..........\...\....\...\JTextField.java
..........\...\....\...\book.java
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