正则表达式返回匹配的字符串

[code="java"]
public static String getSensitive(String globWords){
String keywords = regex.toString();
String sensitive = "";
Pattern pattern = Pattern.compile("快乐|高兴|伤心|");

Matcher matcher = pattern.matcher(globWords);

if (matcher.find()) {

System.out.println(matcher.replaceAll(""));
}

    return sensitive;
}

public static void main(String [] args){
    Sensitive.getSensitive("今天你高兴吗？");
}

[/code]
上面的例子代码中，“今天你高兴吗？”可以匹配上面“快乐|高兴|伤心|”正则表达式的高兴，现在我想把所匹配的“高兴”这个词取出来，保存到sensitive当中，我该怎么做呢？

[code="java"]public static String getSensitive(String globWords){
String keywords = regex.toString();
String sensitive = "";
Pattern pattern = Pattern.compile("((快乐)|(高兴)|(伤心))");

Matcher matcher = pattern.matcher(globWords);

if (matcher.find()) {

sensitive = matcher.group(1);
}

    return sensitive;
}[/code]