import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Example {
public static void main(String[] args) {
final String regex = "^\\$?(?:\\d+|\\d*\\.\\d+|(?:\\d{1,3},)?(?:\\d{3},)*\\d{3}|(?:\\d{1,3},)?(?:\\d{3},)*\\d{3}\\.\\d+)$";
final String string = "1\n"
+ "123\n"
+ "1234567\n"
+ "1234567890\n"
+ "1,234\n"
+ "123,456\n"
+ "1,234,567\n"
+ "1,234,567,890\n"
+ "$1\n"
+ "$123\n"
+ "$1234567.890\n"
+ "$1234567890\n"
+ "$1,234\n"
+ "$123,456\n"
+ "$1,234,567\n"
+ "1.0\n"
+ "123.0\n"
+ "1234567.0\n"
+ "1,234.0\n"
+ "123,456.0\n"
+ "1,234,567.0\n"
+ "$1.0\n"
+ "$123.0\n"
+ "$123456.0\n"
+ "$1,234.0\n"
+ "$123,456.0\n"
+ "$1,234,567.987\n"
+ ".0\n"
+ "$.0\n"
+ ".01\n"
+ "$.02\n\n"
+ " 1 12\n"
+ "1,23\n"
+ "1,234567\n"
+ "$\n"
+ "$,0\n"
+ "$1,0\n"
+ "1.1.1\n"
+ "1.\n"
+ ".\n"
+ "1,1\n"
+ ",1\n"
+ "1,1.0\n"
+ "1.1,0\n"
+ ",";
final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE | Pattern.UNICODE_CASE);
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