下载了，好是好东西。但是我遇到一个问题：在21，22章里复制过来的好几个代码都有这个问题。比如下面这段
public class HTMLListenerTest extends JFrame {
private JEditorPane editorPane = new JEditorPane();
public HTMLListenerTest() {
Container contentPane = getContentPane();
String url = "file:" + System.getProperty("user.dir") +
System.getProperty("file.separator") +
"java.util.Hashtable.html";
try {
editorPane.setPage(url);
}
catch(IOException ex) { ex.printStackTrace(); }
contentPane.add(new JScrollPane(editorPane),
BorderLayout.CENTER);
editorPane.setEditable(false);
editorPane.addHyperlinkListener(new HyperlinkListener() {
public void hyperlinkUpdate(HyperlinkEvent e) {
try {
editorPane.setPage(e.getURL());
}
catch(IOException ex) { ex.printStackTrace(); }
}
});
}
public static void main(String args[]) {
GJApp.launch(new HTMLListenerTest(),
"JEditorPane",300,300,450,300);
}
}
class
GJApp extends WindowAdapter {
static private JPanel statusArea = new JPanel();
static private JLabel status = new JLabel(" ");
static private ResourceBundle resources;
public static void launch(final JFrame f, String title,
final int x, final int y,
final int w, int h) {
launch(f,title,x,y,w,h,null);
}
public static void launch(final JFrame f, String title,
final int x, final int y,
final int w, int h,
String propertiesFilename) {
f.setTitle(title);
f.setBounds(x,y,w,h);
f.setVisible(true);
statusArea.setBorder(BorderFactory.createEtchedBorder());
statusArea.setLayout(new FlowLayout(FlowLayout.LEFT,0,0));
statusArea.add(status);
status.setHorizontalAlignment(JLabel.LEFT);
f.setDefaultCloseOperation(
WindowConstants.DISPOSE_ON_CLOSE);
if(propertiesFilename != null) {
resources = ResourceBundle.getBundle(
propertiesFilename, Locale.getDefault());
}
f.addWindowListener(new WindowAdapter() {
public void windowClosed(WindowEvent e) {
System.exit(0);
}
});
}
static public JPanel getStatusArea() {
return statusArea;
}
static public void showStatus(String s) {
status.setText(s);
}
static Object getResource(String key) {
if(resources != null) {
return resources.getString(key);
}
return null;
}
}
在Eclipse3.2里编译的时候就会报错：已定义类型GJApp。
不知为什么？我看来看去觉得没错啊，但就是报错。LZ你能不能帮忙看看呢？
