Ajuda

package shc;

import javax.swing.*;
import javax.swing.text.*;
import javax.swing.event.*;
import java.awt.*;

public class Main extends JFrame implements DocumentListener {

	JTextPane jp;
	Segment seg = new Segment();
	Document pd;
	
	boolean DELIMITER_START;
	boolean STAR_START;
	boolean DELIMITER_END;
	boolean STAR_END;
	boolean isSL_COMMENT;
	boolean isML_COMMENT;
		
	public Main(){
		initJTextPane();
		init();
	}
	
	private void initJTextPane(){
		jp = new JTextPane();
		jp.setPreferredSize(new Dimension(400,500));
		jp.setFont(new Font("Courier New",Font.PLAIN,13));
		pd = jp.getDocument();
		pd.addDocumentListener(this);
	}
	
	private void init(){
		add(jp);
		setDefaultCloseOperation(EXIT_ON_CLOSE);
		pack();
		setVisible(true);
	}
	
	private void is(Element context) throws BadLocationException {
		int offset = context.getStartOffset();
		int end = context.getEndOffset();
		pd.getText(offset, end, seg);
		for(int i=0; i < seg.length(); i++){
			char indexed = charAt(i);
			if((!DELIMITER_START && !STAR_START && !isSL_COMMENT && !isML_COMMENT && indexed == '/') || 
				!DELIMITER_START && !STAR_START && DELIMITER_END && STAR_END && !isSL_COMMENT && !isML_COMMENT && indexed == '/'){
				DELIMITER_START = true;
			}
			else if(DELIMITER_START && !STAR_START && !isSL_COMMENT && !isML_COMMENT && indexed == '/'){
				isSL_COMMENT = true;
				match("SingleLine Comment");
			}
			else if(DELIMITER_START && !STAR_START && !isSL_COMMENT && !isML_COMMENT && indexed == '*'){
				STAR_START = true;
			}
			else if(DELIMITER_START && STAR_START && !isSL_COMMENT && !isML_COMMENT){
				isML_COMMENT = true;
				match("MultiLine Comment");
			}
			else if(DELIMITER_START && !STAR_START && isSL_COMMENT && !isML_COMMENT && indexed == '\n'){
				match("SingleLine Comment End");
			}
			else if(DELIMITER_START && STAR_START && !DELIMITER_END && !STAR_END && !isSL_COMMENT && isML_COMMENT && indexed == '*'){
				STAR_END = true;
			}
			else if(DELIMITER_START && STAR_START && !DELIMITER_END && STAR_END && !isSL_COMMENT && isML_COMMENT && indexed == '/'){
				DELIMITER_END = true;
				match("MultiLine Comment End");
			}
			else {
				DELIMITER_START = false;
				STAR_START = false;
				DELIMITER_END = false;
				STAR_END = false;
			}
		}
	}
	
	private void match(String b){
		System.out.println(b);
	}
	
	private char charAt(int index){
		return seg.array[seg.offset+index];
	}
	
	private void start(){
		Runnable run = new Runnable(){
			public void run(){
				try {
					is(pd.getDefaultRootElement());
				} catch (BadLocationException e) {
					e.printStackTrace();
				}
			}
		};
		SwingUtilities.invokeLater(run);
	}
	
	public static void main(String[] string){
		new Main();
	}

	public void changedUpdate(DocumentEvent arg0) {}

	public void insertUpdate(DocumentEvent arg0) {
		start();		
	}

	public void removeUpdate(DocumentEvent arg0) {
		start();
	}
	
}