Java开发网 - 请帮我看一看这段代码! (cannot resolve symbol 大家可以不理)

Topic: 请帮我看一看这段代码! (cannot resolve symbol 大家可以不理)

1.请帮我看一看这段代码! (cannot resolve symbol 大家可以不理)

Posted by: q_yuan
Posted on: 2004-11-09 19:51

请各位高手帮我看一看这段代码，并给出正确的!谢谢!
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class StyleChooser extends JPanel{
static JFrame frame;
static String metal="Metal";
static String metalClassName="javax.swing.plaf.metal.MetalLookAnedFeel";
static String motif= "Motif";
static String motifClassName="sun.java.swing.plaf.motif.MotifLookAnedFeel";
static String windows= "Windows";
static String windowsClassName="sun.java.swing.plaf.windows.WindowsLookAnedFeel";
JRadioButton metalButton,motifButton,windowsButton;
public StyleChooser(){
JLabel label= new JLabel("Try the style Swing has");
metalButton = new JRadioButton(metal);
metalButton.setMnemonic('o');
metalButton.setActionCommand(metalClassName);
motifButton = new JRadioButton(motif);
motifButton.setMnemonic('m');
motifButton.setActionCommand(motifClassName);
windowsButton = new JRadioButton(windows);
windowsButton.setMnemonic('w');
windowsButton.setActionCommand(windowsClassName);
ButtonGroup group = new ButtonGroup();
group.add(metalButton);
group.add(motifButton);
group.add(windowsButton);
RadioListener myListener = new RadioListener();
metalButton.addActionListener(myListener);
motifButton.addActionListener(myListener);
windowsButton.addActionListener(myListener);
add(label);
add(metalButton);
add(motifButton);
add(windowsButton);
  }
class RadioListener implements ActionListener{
public void actionPerformed(ActionEvent e){
String lnfName = e.getActionCommand();
try{
IManager.setLookAndFeel(lnfName);
wingUtilities.updateComponentTreeUI(frame);
frame.pack();
  }catch(Exception e){
JRadioButton button =(JRadioButton)e.getSource();
button.setEnabled(false);
updateState();
System.err.println("Could not load LookAndFeel:" + lnfName);
}
}
}
public void updateState(){
String lnfName = UIManager.getLookAndFeel().getClass().getName();
if(lnfName.indexOf(metal)>=0){metalButton.setSelected(true);}
else if (lnfName.indexOf(motif)>=0){motifButton.setSelected(true);}
else if (lnfName.indexOf(windows)>=0){windowsButton.setSelected(true);}
else{System.err.println("StyleChooser is Using an Unkown L&F:" + lnfName);}
}
public static void main(String[] arg){
StyleChooser panel = new StyleChooser();
frame=new JFrame("StyleChooser");
frame.addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e){
System.exit(0);
}
});
frame.getContentPane().add("Center",panel);
frame.pack();
frame.setVisible(true);
panel.updateState();
}
}

我编译的时候出现了错误提示为：
D:\Program Files\Xinox Software\JCreator Pro\MyProjects\FramPanel\StyleChooser.java:41: cannot resolve symbol
symbol : variable IManager
location: class StyleChooser.RadioListener
          IManager.setLookAndFeel(lnfName);
^
D:\Program Files\Xinox Software\JCreator Pro\MyProjects\FramPanel\StyleChooser.java:42: cannot resolve symbol
symbol : variable WingUtilities
location: class StyleChooser.RadioListener
          WingUtilities.updateComponentTreeUI(frame);
^
D:\Program Files\Xinox Software\JCreator Pro\MyProjects\FramPanel\StyleChooser.java:44: e is already defined in actionPerformed(java.awt.event.ActionEvent)
          }catch(Exception e){
^
D:\Program Files\Xinox Software\JCreator Pro\MyProjects\FramPanel\StyleChooser.java:45: cannot resolve symbol
symbol : method getSource ()
location: class java.lang.Exception
            JRadioButton button =(JRadioButton)e.getSource();
^

2.Re:请帮我看一看这段代码! (cannot resolve symbol) [Re: q_yuan]

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Posted by: why
Posted on: 2004-11-09 23:32

try{
UIManager.setLookAndFeel(lnfName);
SwingUtilities.updateComponentTreeUI(frame);
frame.pack();
}catch(Exception ex){

又是毫无意义的标题！
没有格式化、难看死的源码！

而且都是cannot resolve symbol的问题，应该自己解决！
(再懒也可以用Google搜 IManager.setLookAndFeel 和 wingUtilities.updateComponentTreeUI 吧)

自己不肯用心一点，只顾求人，就不要学GUI方面的东西吧！
下次这种问题，见即删！

3.Re:请帮我看一看这段代码! (cannot resolve symbol 大家可以不理) [Re: q_yuan]

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Posted by: why
Posted on: 2004-11-10 08:43

抄 chengbd 版主的话﹕
不应该先把自己首先放在一个”新手“的位置上，而不亲自想办法解决问题，请您在群里看看，真的高手都是自己解决问题的，要问也是请教”方向“性的问题！如果遇到问题时总是问别人，我想这样永远也是新手。

http://www.cjsdn.net/post/view?bid=51&id=122324