在最近的项目中，需要用颜色区分变量和名称等属性，我上网查阅了一下，只是实现了键盘输入关键字高亮显示，代码如下：
package com.suntray.test;
import java.awt.*;
import java.awt.event.*;
import java.util.StringTokenizer;
import javax.swing.*;
import javax.swing.text.*;
import javax.swing.event.*;
import javax.swing.text.rtf.RTFEditorKit;
public class TestPane extends JTextPane {
private static final long serialVersionUID = 8663329106959287304L;
protected StyleContext m_context;
protected DefaultStyledDocument m_doc;
private MutableAttributeSet keyAttr, normalAttr;
private MutableAttributeSet inputAttributes = new RTFEditorKit()
.getInputAttributes();
private String[] keyWord = { "int", "float" };
public TestPane() {
super();
m_context = new StyleContext();
m_doc = new DefaultStyledDocument(m_context);
this.setDocument(m_doc);
//键盘监听事件
this.addKeyListener(new KeyAdapter() {
public void keyReleased(KeyEvent ke) {
// syntaxParse();
}
});
keyAttr = new SimpleAttributeSet();
StyleConstants.setForeground(keyAttr, Color.magenta);
normalAttr = new SimpleAttributeSet();
StyleConstants.setForeground(normalAttr, Color.blue);
}
public void syntaxParse() {
try {
String s = null;
Element root = m_doc.getDefaultRootElement();
int cursorPos = this.getCaretPosition();
int line = root.getElementIndex(cursorPos);
Element para = root.getElement(line);
int start = para.getStartOffset();
int end = para.getEndOffset() - 1;
s = m_doc.getText(start, end - start);
int i = 0;
int xStart = 0;
m_doc.setCharacterAttributes(start, s.length(), normalAttr, false);
MyStringTokenizer st = new MyStringTokenizer(s);
while (st.hasMoreTokens()) {
s = st.nextToken();
if (s == null)
return;
for (i = 0; i < keyWord.length; i++) {
if (s.equals(keyWord[i]))
break;
}
if (i >= keyWord.length)
continue;
xStart = st.getCurrPosition();
m_doc.setCharacterAttributes(start + xStart, s.length(),
keyAttr, false);
}
inputAttributes.addAttributes(normalAttr);
} catch (Exception ex) {
ex.printStackTrace();
}
}
public static void main(String[] args) {
JFrame frame = new JFrame("test text pane");
frame.getContentPane().add(new TestPane());
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
final int inset = 50;
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
frame.setBounds(inset, inset, screenSize.width - inset * 2,
screenSize.height - inset * 2);
frame.show();
}
}
class MyStringTokenizer extends StringTokenizer {
String sval = " ";
String oldStr, str;
int m_currPosition = 0, m_beginPosition = 0;
MyStringTokenizer(String str) {
super(str, " ");
this.oldStr = str;
this.str = str;
}
public String nextToken() {
try {
String s = super.nextToken();
int pos = -1;
if (oldStr.equals(s)) {
return s;
}
pos = str.indexOf(s + sval);
if (pos == -1) {
pos = str.indexOf(sval + s);
if (pos == -1)
return null;
else
pos += 1;
}
int xBegin = pos + s.length();
str = str.substring(xBegin);
m_currPosition = m_beginPosition + pos;
m_beginPosition = m_beginPosition + xBegin;
return s;
} catch (java.util.NoSuchElementException ex) {
ex.printStackTrace();
return null;
}
}
public int getCurrPosition() {
return m_currPosition;
}
}
而我需要打开文件和点击按钮的方式，也高亮显示，这个还没有实现，希望大家有明白的，指点一下,谢啦