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Update CalculatorFrame.java #1

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Update CalculatorFrame.java #1

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5 changes: 5 additions & 0 deletions Lesson01/src/lesson01/exam01/CalculatorFrame.java
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package lesson01.exam01;

#A generic Abstract Window Toolkit(AWT) container object is a component that can contain other AWT components.
import java.awt.Container;
#Dimension class encapsulates the width and height of a component
import java.awt.Dimension;
#A semantic event which indicates that a component-defined action occurred.
import java.awt.event.ActionEvent;
#listener interface for receiving action events.
import java.awt.event.ActionListener;

#swing components
import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.JButton;
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