import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Example {
public static void main(String[] args) {
final String regex = "^(-)?(\\d+)(?:[\\s\\.]0+)?\\s*(?:USD)?$";
final String string = "123.00 USD\n"
+ "1234 USD\n"
+ "357.0 USD\n"
+ "456 00 USD\n"
+ "651USD\n"
+ "753.684 USD\n"
+ "123 456 USD\n"
+ "-123 USD\n"
+ "789.00 XXX\n"
+ "123.00 wrongcurrency\n"
+ "test string\n"
+ "$159\n"
+ "123";
final String subst = "\\0 => \\1$\\2";
final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE);
final Matcher matcher = pattern.matcher(string);
// The substituted value will be contained in the result variable
final String result = matcher.replaceAll(subst);
System.out.println("Substitution result: " + result);
}
}
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