调试出错，这个例子该如何改？
//贴子太长了，前部分在回复里
public class DialogDemo implements ActionListener{
JFrame f=null;

public void actionPerformed(ActionEvent e){
String cmd=e.getActionCommand();
if (cmd.equals( "借用物品 ")){
new LendingSystem(f);
}else if (cmd.equals( "离开系统 ")){
System.exit(0);
}
}
public DialogDemo(){
f=new JFrame( "JDialog Example ");
Container contentPane=f.getContentPane();
JPanel buttonPanel=new JPanel();
JButton b=new JButton( "借用物品 ");
b.addActionListener(this);
buttonPanel.add(b);
b=new JButton( "离开系统 ");
b.addActionListener(this);
buttonPanel.add(b);

buttonPanel.setBorder(BorderFactory.createTitledBorder(BorderFactory.createLineBorder(Color.blue,2),
"借用物品系统 ",TitledBorder.CENTER,TitledBorder.TOP));
contentPane.add(buttonPanel,BorderLayout.CENTER);
f.pack();
f.setVisible(true);
f.addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e){
System.exit(0);
}
});
}
public static void main(String[] args){
SwingUtil.setLookAndFeel();
new DialogDemo();
}
}
class LendingSystem implements ActionListener{
JTextField staffField,objectField,borrowDateField,returnDateField,reasonField;
JDialog dialog;
public void actionPerformed(ActionEvent e){
String cmd=e.getActionCommand();
if (cmd.equals( "确定 ")){

}else if (cmd.equals( "取消 ")){
dialog.dispose();
}
}
LendingSystem(JFrame f){
dialog = new JDialog(f, "借用物品 ",true);

GridBagConstraints c;
int gridx,gridy,gridwidth,
gridheight,anchor,fill,ipadx,ipady;
double weightx,weighty;
Insets inset;

GridBagLayout gridbag = new GridBagLayout();
Container dialogPane = dialog.getContentPane();
dialogPane.setLayout(gridbag);

JLabel label = new JLabel( "员工编号 : ");
gridx=0; //第0列
gridy=0; //第0行
gridwidth = 1; //占一单位宽度
gridheight = 1; //占一单位高度
weightx = 0; //窗口增大时组件宽度增大比率0
weighty = 0; //窗口增大时组件高度增大比率0
anchor = GridBagConstraints.CENTER; //容器大于组件size时将组件置于容器中央
fill = GridBagConstraints.BOTH; //窗口拉大时会填满水平与垂直空间
inset = new Insets(0,0,0,0); //组件间间距
ipadx = 0; //组件内水平宽度
ipady = 0; //组件内垂直高度
c = new GridBagConstraints(gridx,gridy,gridwidth,gridheight,
weightx,weighty,anchor,fill,inset,ipadx,ipady);
gridbag.setConstraints(label,c);
dialogPane.add(label);

label = new JLabel( "借用器具 : ");
gridx=3;
gridy=0;
c = new GridBagConstraints(gridx,gridy,gridwidth,gridheight,
weightx,weighty,anchor,fill,inset,ipadx,ipady);
gridbag.setConstraints(label,c);
dialogPane.add(label);

label = new JLabel( "借用日期: ");
gridx=0;
gridy=1;
c = new GridBagConstraints(gridx,gridy,gridwidth,gridheight,
weightx,weighty,anchor,fill,inset,ipadx,ipady);
gridbag.setConstraints(label,c);
dialogPane.add(label);

label = new JLabel( "归还日期: ");
gridx=3;
gridy=1;
c = new GridBagConstraints(gridx,gridy,gridwidth,gridheight,
weightx,weighty,anchor,fill,inset,ipadx,ipady);
gridbag.setConstraints(label,c);
dialogPane.add(label);

label = new JLabel( "借用原因 : ");
gridx=0;
gridy=2;
c = new GridBagConstraints(gridx,gridy,gridwidth,gridheight,
weightx,weighty,anchor,fill,inset,ipadx,ipady);
gridbag.setConstraints(label,c);
dialogPane.add(label);

staffField = new JTextField();
gridx=1;
gridy=0;
gridwidth = 2;
gridheight = 1;
weightx = 1;

weighty = 0;
c = new GridBagConstraints(gridx,gridy,gridwidth,gridheight,
weightx,weighty,anchor,fill,inset,ipadx,ipady);
gridbag.setConstraints(staffField,c);
dialogPane.add(staffField);

objectField = new JTextField();
gridx=4;
gridy=0;
c = new GridBagConstraints(gridx,gridy,gridwidth,gridheight,
weightx,weighty,anchor,fill,inset,ipadx,ipady);
gridbag.setConstraints(objectField,c);
dialogPane.add(objectField);

borrowDateField = new JTextField();
gridx=1;
gridy=1;
c = new GridBagConstraints(gridx,gridy,gridwidth,gridheight,
weightx,weighty,anchor,fill,inset,ipadx,ipady);
gridbag.setConstraints(borrowDateField,c);
dialogPane.add(borrowDateField);

returnDateField = new JTextField();
gridx=4;
gridy=1;
c = new GridBagConstraints(gridx,gridy,gridwidth,gridheight,
weightx,weighty,anchor,fill,inset,ipadx,ipady);
gridbag.setConstraints(returnDateField,c);
dialogPane.add(returnDateField);

reasonField = new JTextField();
gridx=1;
gridy=2;
gridwidth = 5;
c = new GridBagConstraints(gridx,gridy,gridwidth,gridheight,
weightx,weighty,anchor,fill,inset,ipadx,ipady);
gridbag.setConstraints(reasonField,c);

dialogPane.add(reasonField);

JPanel panel = new JPanel();
panel.setLayout(new GridLayout(1,2));
JButton b = new JButton( "确定 ");
panel.add(b);
b = new JButton( "取消 ");
b.addActionListener(this);
panel.add(b);

gridx=0;
gridy=3;
gridwidth = 6;
weightx = 1;
weighty = 1;
c = new GridBagConstraints(gridx,gridy,gridwidth,gridheight,
weightx,weighty,anchor,fill,inset,ipadx,ipady);
gridbag.setConstraints(panel,c);
dialogPane.add(panel);

dialog.setBounds(200,150,400,130);
dialog.show();
}
}

class SwingUtil{
public static final void setLookAndFeel() {
try{
Font font = new Font( "JFrame ", Font.PLAIN, 12);
Enumeration keys = UIManager.getLookAndFeelDefaults().keys();

while (keys.hasMoreElements()) {
Object key = keys.nextElement();
if (UIManager.get(key) instanceof Font) {
UIManager.put(key, font);
}
}
AlloyLookAndFeel.setProperty( "alloy.isLookAndFeelFrameDecoration ", "true ");
//---------------------出错-------------------------------
AlloyTheme theme = new GlassTheme();

LookAndFeel alloyLnF = new AlloyLookAndFeel(theme);
UIManager.setLookAndFeel(alloyLnF);
//----------------------------------------------------
}catch(UnsupportedLookAndFeelException ex){
ex.printStackTrace();
}

}
}

[解决办法]
:)
[解决办法]
AlloyLookAndFeel
AlloyTheme
是啥？
帮你顶