import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Example {
public static void main(String[] args) {
final String regex = "^(?:[1-9]?\\d|1\\d\\d|2[0-4]\\d|25[0-5])$";
final String string = "1\n"
+ "2\n"
+ "3\n"
+ "4\n"
+ "5\n"
+ "6\n"
+ "7\n"
+ "8\n"
+ "9\n"
+ "10\n"
+ "11\n"
+ "12\n"
+ "13\n"
+ "14\n"
+ "15\n"
+ "16\n"
+ "17\n"
+ "18\n"
+ "19\n"
+ "20\n"
+ "21\n"
+ "22\n"
+ "23\n"
+ "24\n"
+ "25\n"
+ "26\n"
+ "27\n"
+ "28\n"
+ "29\n"
+ "30\n"
+ "31\n"
+ "32\n"
+ "33\n"
+ "34\n"
+ "35\n"
+ "36\n"
+ "37\n"
+ "38\n"
+ "39\n"
+ "40\n"
+ "41\n"
+ "42\n"
+ "43\n"
+ "44\n"
+ "45\n"
+ "46\n"
+ "47\n"
+ "48\n"
+ "49\n"
+ "50\n"
+ "51\n"
+ "52\n"
+ "53\n"
+ "54\n"
+ "55\n"
+ "56\n"
+ "57\n"
+ "58\n"
+ "59\n"
+ "60\n"
+ "61\n"
+ "62\n"
+ "63\n"
+ "64\n"
+ "65\n"
+ "66\n"
+ "67\n"
+ "68\n"
+ "69\n"
+ "70\n"
+ "71\n"
+ "72\n"
+ "73\n"
+ "74\n"
+ "75\n"
+ "76\n"
+ "77\n"
+ "78\n"
+ "79\n"
+ "80\n"
+ "81\n"
+ "82\n"
+ "83\n"
+ "84\n"
+ "85\n"
+ "86\n"
+ "87\n"
+ "88\n"
+ "89\n"
+ "90\n"
+ "91\n"
+ "92\n"
+ "93\n"
+ "94\n"
+ "95\n"
+ "96\n"
+ "97\n"
+ "98\n"
+ "99\n"
+ "100\n"
+ "101\n"
+ "102\n"
+ "103\n"
+ "104\n"
+ "105\n"
+ "106\n"
+ "107\n"
+ "108\n"
+ "109\n"
+ "110\n"
+ "111\n"
+ "112\n"
+ "113\n"
+ "114\n"
+ "115\n"
+ "116\n"
+ "117\n"
+ "118\n"
+ "119\n"
+ "120\n"
+ "121\n"
+ "122\n"
+ "123\n"
+ "124\n"
+ "125\n"
+ "126\n"
+ "127\n"
+ "128\n"
+ "129\n"
+ "130\n"
+ "131\n"
+ "132\n"
+ "133\n"
+ "134\n"
+ "135\n"
+ "136\n"
+ "137\n"
+ "138\n"
+ "139\n"
+ "140\n"
+ "141\n"
+ "142\n"
+ "143\n"
+ "144\n"
+ "145\n"
+ "146\n"
+ "147\n"
+ "148\n"
+ "149\n"
+ "150\n"
+ "151\n"
+ "152\n"
+ "153\n"
+ "154\n"
+ "155\n"
+ "156\n"
+ "157\n"
+ "158\n"
+ "159\n"
+ "160\n"
+ "161\n"
+ "162\n"
+ "163\n"
+ "164\n"
+ "165\n"
+ "166\n"
+ "167\n"
+ "168\n"
+ "169\n"
+ "170\n"
+ "171\n"
+ "172\n"
+ "173\n"
+ "174\n"
+ "175\n"
+ "176\n"
+ "177\n"
+ "178\n"
+ "179\n"
+ "180\n"
+ "181\n"
+ "182\n"
+ "183\n"
+ "184\n"
+ "185\n"
+ "186\n"
+ "187\n"
+ "188\n"
+ "189\n"
+ "190\n"
+ "191\n"
+ "192\n"
+ "193\n"
+ "194\n"
+ "195\n"
+ "196\n"
+ "197\n"
+ "198\n"
+ "199\n"
+ "200\n"
+ "201\n"
+ "202\n"
+ "203\n"
+ "204\n"
+ "205\n"
+ "206\n"
+ "207\n"
+ "208\n"
+ "209\n"
+ "210\n"
+ "211\n"
+ "212\n"
+ "213\n"
+ "214\n"
+ "215\n"
+ "216\n"
+ "217\n"
+ "218\n"
+ "219\n"
+ "220\n"
+ "221\n"
+ "222\n"
+ "223\n"
+ "224\n"
+ "225\n"
+ "226\n"
+ "227\n"
+ "228\n"
+ "229\n"
+ "230\n"
+ "231\n"
+ "232\n"
+ "233\n"
+ "234\n"
+ "235\n"
+ "236\n"
+ "237\n"
+ "238\n"
+ "239\n"
+ "240\n"
+ "241\n"
+ "242\n"
+ "243\n"
+ "244\n"
+ "245\n"
+ "246\n"
+ "247\n"
+ "248\n"
+ "249\n"
+ "250\n"
+ "251\n"
+ "252\n"
+ "253\n"
+ "254\n"
+ "255\n"
+ "256\n"
+ "299\n"
+ "300\n"
+ "1000";
final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE);
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