中间下划线处提示错误，百思不得其解
package dodod;
import java.awt.*;
import java.awt.event.*;
import java.lang.reflect.*;
import java.net.*;
import java.text.*;
import java.util.*;
import javax.swing.*;
import javax.swing.text.*;
public class FormatTest {
public static void main(String[] args)
{
FormatTestFrame frame=new FormatTestFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}
class FormatTestFrame extends JFrame
{
public FormatTestFrame()
{
setTitle("FormatTest");
setSize(WIDTH,HEIGHT);
JPanel buttonPanel=new JPanel();
okButton=new JButton("ok");
buttonPanel.add(okButton);
add(buttonPanel,BorderLayout.SOUTH);
mainPanel=new JPanel();
mainPanel.setLayout(new GridLayout(0,3));
add(mainPanel,BorderLayout.CENTER);
JFormattedTextField intField=new JFormattedTextField(NumberFormat.getIntegerInstance());
intField.setValue(new Integer(100));
addRow("Number:",intField);
JFormattedTextField intField2=new JFormattedTextField(NumberFormat.getIntegerInstance());
intField2.setValue(new Integer(100));
intField2.setFocusLostBehavior(JFormattedTextField.COMMIT);
addRow("Number(Commit behavior):",intField2);
JFormattedTextField intField3=new JFormattedTextField(new InternationalFormatter(NumberFormat.getIntegerInstance()){
protected DocumentFilter getDocumentFilter()
{
return filter;
}
private DocumentFilter filter=new IntFilter();
});
intField3.setValue(new Integer(100));
addRow("Filtered Number",intField3);
JFormattedTextField intField4=new JFormattedTextField(NumberFormat.getIntegerInstance());
intField4.setValue(new Integer(100));
intField4.setInputVerifier(new FormattedTextFieldVerifier());
addRow("Verified Number:",intField4);
JFormattedTextField currencyField=new JFormattedTextField(NumberFormat.getIntegerInstance());
currencyField.setValue(new Double(10));
addRow("Currency:",currencyField);
JFormattedTextField dateField=new JFormattedTextField(DateFormat.getInstance());
dateField.setValue(new Date());
addRow("Date(default):",dateField);
DateFormat format=DateFormat.getDateInstance(DateFormat.SHORT);
format.setLenient(false);
JFormattedTextField dateField2=new JFormattedTextField(format);
dateField2.setValue(new Date());
addRow("Date(short,not lenient):",dateField2);
try
{
DefaultFormatter formatter=new DateFormatter();
formatter.setOverwriteMode(false);
JFormattedTextField urlField=new JFormattedTextField(formatter);
urlField.setValue(new URL("http://java.sun.com"));
addRow("URL:",urlField);
}
catch (MalformedURLException e){
e.printStackTrace();
}
try
{
MaskFormatter formatter=new MaskFormatter("###-##-####");
formatter.setPlaceholderCharacter('0');
JFormattedTextField ssnField=new JFormattedTextField(formatter);
ssnField.setValue("078-05-1120");
addRow("SSN MASK:",ssnField);
}
catch (ParseException exception){
exception.printStackTrace();
}
JFormattedTextField ipField=new JFormattedTextField(new IPAddressFormatter());
ipField.setValue(new byte[]{(byte) 130,65,86,66});
addRow("IP Address:",ipField);
}
public void addRow(String labelText,final JFormattedTextField field){
mainPanel.add(new JLabel(labelText));
mainPanel.add(field);
final JLabel valueLabel=new JLabel();
mainPanel.add(valueLabel);
okButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent event)
{
Object value=field.getValue();
if (value.getClass().isArray())
{
StringBuilder builder=new StringBuilder();
builder.append('{');
for (int i=0;i<Array.getLength(value);i++)
{
if (i>0)builder.append(',');
builder.append(Array.get(value,i).toString());
}
builder.append('}');
valueLabel.setText(builder.toString());
}
else
valueLabel.setText(value.toString());
}
});
}
public static final int WIDTH=500;
public static final int HEIGHT=250;
private JButton okButton;
private JPanel mainPanel;
}
class IntFilter extends DocumentFilter {
public void insertString(FilterBypass fb, int offset, String string, AttributeSet attr)
throws BadLocationException
{
StringBuilder builder = new StringBuilder(string);
for (int i = builder.length() - 1; i >= 0; i--)
{
int cp = builder.codePointAt(i);
if (!Character.isDigit(cp) && cp != '-')
{
i--;
builder.deleteCharAt(i);
}
}
}
super.insertString(fb,offset,builder.toString(),attr);
}
public void replace(FilterBypass fb,int offset,int length,String string,AttributeSet attr)
throws BadLocationException {
if (string != null) {
StringBuilder builder = new StringBuilder(string);
for (int i = builder.length() - 1; i >= 0; i--) {
int cp = builder.codePointAt(i);
if (!Character.isSupplementaryCodePoint(cp)) {
i--;
builder.deleteCharAt(i);
}
}
}
string=builder.toString();
}
super.replace(fb,offset,length,string,attr);
}
}
class FormattedTextFieldVerifier extends InputVerifier
{
public boolean verify(JComponent component)
{
JFormattedTextField field=(JFormattedTextField) component;
return field.isEditValid();
}
}
class IPAddressFormatter extends DefaultFormatter
{
public String valueToString(Object value)
throws ParseException
{
if (!(value instanceof byte[]))
throw new ParseException("Not a byte[]",0);
byte[]a=(byte[]) value;
if (a.length!=4)throw new ProtocolException ("length!=4",0);
StringBuilder builder=new StringBuilder();
for (int i=0;i<4;i++)
{
int b=a[i];
if (b<0)b+=256;
builder.append(String.valueOf(b));
if (i<3)builder.append('.');
}
return builder.toString();
}
public Object stringToValue(String text)throws ParseException
{
StringTokenizer tokenizer=new StringTokenizer(text,".");
byte[]a=new byte[4];
for (int i=0;i<4;i++)
{
int b=0;
if (!tokenizer.hasMoreTokens())
throw new ParseException("Too few bytes",0);
try {
b=Integer.parseInt(tokenizer.nextToken());
}
catch (NumberFormatException e)
{
throw new ParseException("Not an integer",0);
}
if (b<0||b>=256)throw new ParseException("Byte out of range",0);
a[i]=(byte) b;
}
if (tokenizer.hasMoreTokens())throw new ParseException("Too many bytes",0);
return a;
}
}
请提供信息，说明出现了什么错误，这样别人也能更好地帮助你。