Java IO.pdf - Nguyen Dang Binh

Java I/O
numeric data. If they choose text, you'll need to use a reader to read the file instead of an input
stream. You'll also need to provide some means for the user to pick the encoding they want
text read in (e.g., MacRoman, ISO Latin-1, Unicode, etc). Since there are several dozen text
encodings, the best choice is a list box. All of this can be integrated into the mode panel.
Figure 15.1 shows the revised ModePanel2 class. The code is given in Example 15.9. Two
new public methods are added, isText() and getEncoding(). The rest of the changes are
fairly minor ones to set up the GUI.
Figure 15.1. A mode panel with a list box for encodings
Example 15.9. ModePanel2
import java.awt.*;
import javax.swing.*;
public class ModePanel2 extends JPanel {
JCheckBox bigEndian = new JCheckBox("Big Endian", true);
JCheckBox deflated = new JCheckBox("Deflated", false);
JCheckBox gzipped = new JCheckBox("GZipped", false);
ButtonGroup dataTypes = new ButtonGroup();
JRadioButton asciiRadio = new JRadioButton("Text");
JRadioButton decimalRadio = new JRadioButton("Decimal");
JRadioButton hexRadio = new JRadioButton("Hexadecimal");
JRadioButton shortRadio = new JRadioButton("Short");
JRadioButton intRadio = new JRadioButton("Int");
JRadioButton longRadio = new JRadioButton("Long");
JRadioButton floatRadio = new JRadioButton("Float");
JRadioButton doubleRadio = new JRadioButton("Double");
JTextField password = new JTextField();
final static String[] encodings = {"8859_1", "8859_2", "8859_3",
"8859_4",
"8859_5", "8859_6", "8859_7", "8859_8", "8859_9", "Big5", "CNS11643",
"Cp037", "Cp273", "Cp277", "Cp278", "Cp280", "Cp284", "Cp285", "Cp297",
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