import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Example {
public static void main(String[] args) {
final String regex = "^\\$?([0-9]{1,3},([0-9]{3},)*[0-9]{3}|[0-9]+)(\\.[0-9][0-9])?$";
final String string = "$500\n"
+ "$5,00\n"
+ "$5,000\n"
+ "$5.0\n"
+ "$5.\n"
+ "$5.00\n"
+ "$5.000\n"
+ "$5,.5\n"
+ "500\n"
+ "5,000\n"
+ "5,00\n"
+ "5,0\n"
+ "5.0\n"
+ "5.00\n"
+ "5.000\n"
+ "5.23\n"
+ "2.342\n"
+ "$5,5,5\n"
+ "$5,000\n"
+ "$5,000,0\n"
+ "$5,000,00\n"
+ "$5,000,000\n"
+ "$5,0000";
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