JavaScript 用法

<script language="javascript">
    var s=prompt("輸入高亮顯示詞：","奮發");
    var reg=new RegExp("("+s+")","g");
    var str="黯然奮發，奮發技術線上";
    var newstr=str.replace(reg,"<font color=red>$1</font>");
    document.write(newstr);
</script>

C# 用法

using System.Text.RegularExpressions;

htmlString = Regex.Replace(htmlString, @"<script[^>]*?>.*?</script>", "", RegexOptions.IgnoreCase);

注：詳細說明請參見MSDN

Java 用法

import java.util.regex.Matcher;
import java.util.regex.Pattern;

String regEx="a+";
Pattern p=Pattern.compile(regEx);
Matcher m=p.matcher("aaabbced a ccdeaa");
String s=m.replaceAll("A");