Java Highlighter继续亮相
我有以下代码用于突出显示，并且无法弄清楚为什么它会继续突出超出指定的范围。
class DocListener implements DocumentListener {
Color Valid_COLOR = Color.GREEN;
Color Error_COLOR = Color.PINK;
HostCollectionTextField field;
Pattern p;
Matcher m;
private String valid = "(\\d{1,3}(?:\\.\\d{1,3}){2}\\.(\\d{1,3}))(?:(?:-|\\s+to\\s+)(\\d{1,3}(?![\\d\\.]))|(?:-|\\s*to\\s+)(\\d{1,3}(?:\\.\\d{1,3}){3})|\\s+(25\\d(?:\\.\\d{1,3}){3})|\\s*\\/(\\d{1,3}))?";
public DocListener(Component field) {
this.field = (HostCollectionTextField) field;
p = Pattern.compile(valid);
}
@Override
public void insertUpdate(DocumentEvent e) {
// System.out.println("insert:" + field.getText());
m = p.matcher(this.field.getText());
while (m.find()) {
try {
String b = m.group();
System.out.println(b);
int index = field.getText().indexOf(b);
System.out.println("index=" + index);
int end = index + b.length();
System.out.println("end=" + end);
Highlighter.HighlightPainter painter = new DefaultHighlighter.DefaultHighlightPainter(Valid_COLOR);
this.field.getHighlighter().addHighlight(index, end, painter);
System.out.println(">> " + b.substring(2, b.length() - 2));
} catch (BadLocationException ex) {
System.out.println(ex);
}
}
}
@Override
public void removeUpdate(DocumentEvent e) {
System.out.println("removing text");
}
@Override
public void changedUpdate(DocumentEvent e) {
System.out.println("Change:" + field.getText());
}
}
}
您可以在下面的图片中看到问题。
只应突出显示有效匹配，但荧光笔永远不会停止突出显示。
这是我的SSCCE
public class SSCCE extends javax.swing.JFrame {
/**
* Creates new form SSCCE
*/
public SSCCE() {
initComponents();
this.textField.getDocument().addDocumentListener(new DocListener(this.textField));
}
class DocListener implements DocumentListener {
Color Valid_COLOR = Color.GREEN;
Color Error_COLOR = Color.PINK;
JTextField field;
Pattern p;
Matcher m;
Highlighter.HighlightPainter painter;
private String valid = "(\\d{1,3}(?:\\.\\d{1,3}){2}\\.(\\d{1,3}))(?:(?:-|\\s+to\\s+)(\\d{1,3}(?![\\d\\.]))|(?:-|\\s*to\\s+)(\\d{1,3}(?:\\.\\d{1,3}){3})|\\s+(25\\d(?:\\.\\d{1,3}){3})|\\s*\\/(\\d{1,3}))?";
public DocListener(Component field) {
this.field = (JTextField) field;
p = Pattern.compile(valid);
}
@Override
public void insertUpdate(DocumentEvent e) {
System.out.println("insert:" + field.getText());
m = p.matcher(this.field.getText());
ArrayList<String> matches = new ArrayList();
while (m.find()) {
try {
String b = m.group();
matches.add(b);
int index = m.start();
int end = m.end();
System.out.println("start:" + index + " end:" + end);
painter = new DefaultHighlighter.DefaultHighlightPainter(Valid_COLOR);
this.field.getHighlighter().addHighlight(index, end, painter);
} catch (BadLocationException ex) {
System.out.println(ex);
}
}
}
@Override
public void removeUpdate(DocumentEvent e) {
System.out.println("removing text");
}
@Override
public void changedUpdate(DocumentEvent e) {
System.out.println("Change:" + field.getText());
}
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
textField = new javax.swing.JTextField();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
textField.setText("jTextField1");
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(textField, javax.swing.GroupLayout.PREFERRED_SIZE, 408, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(0, 0, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(110, 110, 110)
.addComponent(textField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(170, Short.MAX_VALUE))
);
pack();
}// </editor-fold>
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(SSCCE.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(SSCCE.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(SSCCE.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(SSCCE.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new SSCCE().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JTextField textField;
// End of variables declaration
}
1 个答案:
答案 0 :(得分：0)
我刚刚使用Matcher中的值来设置荧光笔的开始/结束值：
int start = matcher.start(i);
int end = matcher.end(i);
inputArea.getHighlighter().addHighlight( start, end, DefaultHighlighter.DefaultPainter );
以下是演示此功能的完整代码：
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.*;
import java.awt.*;
import java.awt.event.*;
import java.util.regex.Pattern;
import java.util.regex.Matcher;
public class RegexKing implements ActionListener, DocumentListener
{
public static void main(String[] args)
{
new RegexKing();
}
public RegexKing()
{
initGUI();
setupGUI();
displayFrame();
}
public void initGUI()
{
// init
frame = new JFrame("Regex King");
container = new JPanel();
inputArea = new JTextArea();
regexField =new JTextField();
outputArea = new JTextArea();
quickMatch = new JCheckBox("Attempt Match on Change");
matchButton = new JButton("Match");
inputScroll = new JScrollPane(inputArea);
outputScroll = new JScrollPane(outputArea);
// setup
outputArea.setEditable(false);
matchButton.addActionListener(this);
regexField.getDocument().addDocumentListener(this);
// key binding
KeyStroke key = KeyStroke.getKeyStroke(KeyEvent.VK_ENTER, Event.SHIFT_MASK, false);
Action keyact = new AbstractAction()
{
public void actionPerformed(ActionEvent e)
{
doMatch();
}
};
container.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(key, "DO_MATCH");
container.getActionMap().put("DO_MATCH", keyact);
}
public void setupGUI()
{
gbl = new GridBagLayout();
gbc = new GridBagConstraints();
container.setLayout(gbl);
setInsets(2, 2, 2, 2);
gbcf = GridBagConstraints.BOTH;
setComp(inputScroll, 10, 10, 20, 1, 1, 1);
setComp(quickMatch, 10, 20, 1, 1, 1, .1);
setComp(matchButton, 20, 20, 1, 1, 1, .1);
setComp(regexField, 10, 30, 20, 1, 1, .1);
setComp(outputScroll, 10, 40, 20, 1, 1, 1);
}
public void setComp(JComponent comp, int gx, int gy, int gw, int gh, double wx, double wy)
{
gbc.gridx = gx;
gbc.gridy = gy;
gbc.gridwidth = gw;
gbc.gridheight = gh;
gbc.weightx = wx;
gbc.weighty = wy;
gbc.fill = gbcf;
gbl.setConstraints(comp, gbc);
container.add(comp);
}
public void setInsets(int top, int bottom, int left, int right)
{
gbc.insets.top = top;
gbc.insets.bottom = bottom;
gbc.insets.left = left;
gbc.insets.right = right;
}
public void displayFrame()
{
frame.setContentPane(container);
frame.setSize(500, 500);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
public void insertUpdate(DocumentEvent e)
{
if(quickMatch.isSelected() == true)
{
doMatch();
}
}
public void removeUpdate(DocumentEvent e)
{
if(quickMatch.isSelected() == true)
{
doMatch();
}
}
public void changedUpdate(DocumentEvent e) {}
public void actionPerformed(ActionEvent evt)
{
if(evt.getSource() == matchButton)
{
doMatch();
}
}
public void doMatch()
{
outputArea.setText("\nAttempting Match...");
inputArea.getHighlighter().removeAllHighlights();
try
{
String inputText = inputArea.getText();
Pattern pattern = Pattern.compile(regexField.getText());
Matcher matcher = pattern.matcher(inputText);
int matchCount = 0;
while(matcher.find())
{
matchCount++;
outputArea.append("\n\nMatch #" + matchCount);
for (int i = 0; i < matcher.groupCount() + 1; i++)
{
outputArea.append("\nGroup #" + i + ": " + matcher.group(i));
outputArea.append(" , " + matcher.end(i));
int start = matcher.start(i);
int end = matcher.end(i);
inputArea.getHighlighter().addHighlight( start, end, DefaultHighlighter.DefaultPainter );
if (matchCount == 1) inputArea.setCaretPosition(start);
}
}
}
catch(Exception exc)
{
outputArea.append("\nEXCEPTION THROWN");
}
outputArea.append("\n\nFinished.\n");
}
GridBagLayout gbl;
GridBagConstraints gbc;
int gbcf;
JFrame frame;
JPanel container;
JTextArea inputArea;
JTextField regexField;
JTextArea outputArea;
JScrollPane inputScroll;
JScrollPane outputScroll;
JCheckBox quickMatch;
JButton matchButton;
}
在顶部文本区域输入一些文字。在文本字段中输入搜索字符串。如果选中该复选框，则在更改搜索字符串时将完成匹配。如果未选中该复选框，则需要单击“匹配”按钮。某些调试信息将出现在第二个文本区域中。
不要忘记实现removeUpdate（...）方法，因为从文档中删除字符可以更改突出显示。
相关问题
最新问题
- 我写了这段代码，但我无法理解我的错误
- 我无法从一个代码实例的列表中删除 None 值，但我可以在另一个实例中。为什么它适用于一个细分市场而不适用于另一个细分市场？
- 是否有可能使 loadstring 不可能等于打印？卢阿
- java中的random.expovariate()
- Appscript 通过会议在 Google 日历中发送电子邮件和创建活动
- 为什么我的 Onclick 箭头功能在 React 中不起作用？
- 在此代码中是否有使用“this”的替代方法？
- 在 SQL Server 和 PostgreSQL 上查询，我如何从第一个表获得第二个表的可视化
- 每千个数字得到
- 更新了城市边界 KML 文件的来源？