How to select multiple substring in JTextarea at the same time?

Question

I want to select multiple substring in a jtextarea at the same time by select(start,end) method, turns out only the last substring is highlighted, how to implement my goal?

Answer 1

jamesybaby wrote:
What you got so far? A SCCEE would be nice?my aim is to search key words in jtextarea and highlight all matched result.
package frame;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class FrmSelect extends JFrame {
    public FrmSelect() throws HeadlessException {
        setSize(800, 600);
        final JTextField tfKey = new JTextField();
        tfKey.setPreferredSize(new Dimension(200, 20));
        final JTextArea taContent = new JTextArea();
        JScrollPane jsp = new JScrollPane(taContent);
        tfKey.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String key = tfKey.getText();
                String content = taContent.getText();
                String[] splited = content.split(key);
                Pattern ptn = Pattern.compile(key, Pattern.CASE_INSENSITIVE + Pattern.MULTILINE);
                Matcher matcher = ptn.matcher(content);
                taContent.requestFocusInWindow();
                while (matcher.find()) {
                    int start = matcher.start();
                    int end = matcher.end();
                    taContent.select(start, end);
        add(tfKey,BorderLayout.SOUTH);
        add(jsp,BorderLayout.CENTER);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setVisible(true);
    public static void main(String[] args) {
         new FrmSelect();
}please copy below into the jtextarea and type key 'prop' in the jtextfield, press return.
prop1adsfasfd
prop2adsfasdfadsf
prop3asdfasdfasdf