Regular Expressions 101

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An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression
No Match

/
/
g

Test String

Code Generator

Language

Generated Code

import java.util.regex.Matcher; import java.util.regex.Pattern; public class Example { public static void main(String[] args) { final String regex = "<td align=\\\"left\\\">\\s*(<a href=\\\"http:\\/\\/www.proxynova.com\\/proxy-server-list\\/port-\\d+|\\d+).*?\\s*<\\/td>"; final String string = "<table width=\"950\" class=\"table\" id=\"tbl_proxy_list\">\n" + "<thead>\n" + " <tr>\n" + " <th>Proxy IP</th>\n" + " <th>Proxy Port</th>\n" + " <th>Last Check</th>\n" + " <th nowrap=\"nowrap\"><span title=\"Proxy Speed in bytes per second\">Proxy Speed</span></th>\n" + " <th>Uptime</th>\n" + " <th><span title=\"The location of that particular proxy.\">Proxy Country</span></th>\n" + " <th>Anonymity </th>\n" + " </tr>\n" + "</thead>\n" + "<tbody>\n" + " <tr>\n" + " <td align=\"left\"> \n" + " <span class=\"row_proxy_ip\">220.225.87.129</span>\n" + " </td>\n\n" + " <td align=\"left\">\n" + " <a href=\"http://www.proxynova.com/proxy-server-list/port-8080\">8080</a>\n" + " </td>\n" + " <td align=\"left\">\n" + " <time class=\"icon icon-check timeago\" datetime=\"2016-03-14 12:58:53Z\"></time>\n" + " </td> \n" + " <td align=\"left\">\n" + " <div class=\"progress-bar\" data-value=\"7.7100404\" title=\"5855.0202\"></div>\n" + " </td>\n" + " <td style=\"text-align:center !important;\">\n" + " <span style=\"color:#009900;\">59%</span>\n" + " </td>\n" + " <td align=\"left\">\n" + " <img src=\"//www.proxynova.com/assets/images/blank.gif\" class=\"flag flag-in\" width=\"15\" height=\"11\" alt=\"IN\" />\n" + " <a href=\"/proxy-server-list/country-in/\">India \n" + " <span class=\"proxy-city\"> - Chandannagar </span> \n" + " </a>\n" + " </td>\n" + " <td align=\"left\">\n" + " <span class=\"proxy_transparent\" style=\"font-weight:bold; font-size:10px;\">Transparent</span>\n" + " </td>\n" + " </tr>\n" + " <tr>\n" + " <td align=\"left\"> \n" + " <span class=\"row_proxy_ip\">220.225.87.129</span>\n" + " </td>\n\n" + " <td align=\"left\">\n" + " <a href=\"http://www.proxynova.com/proxy-server-list/port-8080\">8080</a>\n" + " </td>\n" + " <td align=\"left\">\n" + " <time class=\"icon icon-check timeago\" datetime=\"2016-03-14 12:58:53Z\"></time>\n" + " </td> \n" + " <td align=\"left\">\n" + " <div class=\"progress-bar\" data-value=\"7.7100404\" title=\"5855.0202\"></div>\n" + " </td>\n" + " <td style=\"text-align:center !important;\">\n" + " <span style=\"color:#009900;\">59%</span>\n" + " </td>\n" + " <td align=\"left\">\n" + " <img src=\"//www.proxynova.com/assets/images/blank.gif\" class=\"flag flag-in\" width=\"15\" height=\"11\" alt=\"IN\" />\n" + " <a href=\"/proxy-server-list/country-in/\">India \n" + " <span class=\"proxy-city\"> - Chandannagar </span> \n" + " </a>\n" + " </td>\n" + " <td align=\"left\">\n" + " <span class=\"proxy_transparent\" style=\"font-weight:bold; font-size:10px;\">Transparent</span>\n" + " </td>\n" + " </tr>\n" + " <tr>\n" + " <td align=\"left\"> \n" + " <span class=\"row_proxy_ip\">220.225.87.129</span>\n" + " </td>\n\n" + " <td align=\"left\">\n" + " 80\n" + " </td>\n" + " <td align=\"left\">\n" + " <time class=\"icon icon-check timeago\" datetime=\"2016-03-14 12:58:53Z\"></time>\n" + " </td> \n" + " <td align=\"left\">\n" + " <div class=\"progress-bar\" data-value=\"7.7100404\" title=\"5855.0202\"></div>\n" + " </td>\n" + " <td style=\"text-align:center !important;\">\n" + " <span style=\"color:#009900;\">59%</span>\n" + " </td>\n" + " <td align=\"left\">\n" + " <img src=\"//www.proxynova.com/assets/images/blank.gif\" class=\"flag flag-in\" width=\"15\" height=\"11\" alt=\"IN\" />\n" + " <a href=\"/proxy-server-list/country-in/\">India \n" + " <span class=\"proxy-city\"> - Chandannagar </span> \n" + " </a>\n" + " </td>\n" + " <td align=\"left\">\n" + " <span class=\"proxy_transparent\" style=\"font-weight:bold; font-size:10px;\">Transparent</span>\n" + " </td>\n" + " </tr>\n" + "</tbody>\n" + "</table>"; final Pattern pattern = Pattern.compile(regex); final Matcher matcher = pattern.matcher(string); while (matcher.find()) { System.out.println("Full match: " + matcher.group(0)); for (int i = 1; i <= matcher.groupCount(); i++) { System.out.println("Group " + i + ": " + matcher.group(i)); } } } }

Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Java, please visit: https://docs.oracle.com/javase/7/docs/api/java/util/regex/Pattern.html