|
import java.awt.Color;
import javax.swing.JTextArea;
import javax.swing.text.BadLocationException;
import javax.swing.text.DefaultHighlighter;
import javax.swing.text.Document;
import javax.swing.text.Highlighter;
import javax.swing.text.JTextComponent;
public class Main {
public static void main(String[] argv) throws Exception {
JTextArea textComp = new JTextArea();
Highlighter hilite = textComp.getHighlighter();
Highlighter.Highlight[] hilites = hilite.getHighlights();
for (int i = 0; i < hilites.length; i++) {
if (hilites[i].getPainter() instanceof MyHighlightPainter) {
hilite.removeHighlight(hilites[i]);
}
}
highlight(textComp);
}
public static void highlight(JTextComponent textComp) {
try {
Highlighter hilite = textComp.getHighlighter();
Document doc = textComp.getDocument();
hilite.addHighlight(3, 5, new MyHighlightPainter(Color.red));
} catch (BadLocationException e) {
e.printStackTrace();
}
}
}
class MyHighlightPainter extends DefaultHighlighter.DefaultHighlightPainter {
public MyHighlightPainter(Color color) {
super(color);
}
}
|
