package java.util.regex;public class PatternSyntaxException extends IllegalArgumentException {    protected String description;    protected String pattern;    protected int index;    public PatternSyntaxException(String description, String pattern, int index) {	this.description = description;	this.pattern = pattern;	this.index = index;    }    public String getDescription() {	return description;    }    public String getPattern() {	return pattern;    }    public int getIndex() {	return index;    }    public String getMessage() {	return description; // XXX    }}