import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.Stroke;
import java.awt.event.ActionEvent;
<BUG>import java.awt.event.ActionListener;
import java.net.URI;</BUG>
import java.text.DecimalFormat;
import java.text.NumberFormat;
<BUG>import java.util.ArrayList;
import java.util.regex.Pattern;</BUG>
import javax.swing.JButton;

import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.Stroke;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.net.URI;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Pattern;
import javax.swing.JButton;
