public class Main
{
   public static void main(String[] args) throws Exception
   {
      String str = "abc /** hi \r\n hello */ bbc";
      String regex = "^(MAX|SUM|AVERAGE|MIN): (\\d+(\\.\\d+)?(, (?=.)|$))+$";
      String regex2 = "^(MAX|SUM|AVERAGE|MIN): (\\d+(\\.\\d+)?(, \\d+(\\.\\d+)?)*)$";
 
      String[] trues = {"MIN: 123", 
                        "MIN: 123, 1.2", 
                        "MIN: 123, 1",
                        "MAX: 12, 12.32, 54.3332"};
      String[] falses = {"Randomdata", 
                         "MIN: ", 
                         "MIN: 123,", 
                         "MIN: 123, ", 
                         "MIN: 123, 1.", 
                         "MIN: 123, .1",
                         "MIN: 123, 1, .1"};
      System.out.println("Trues:");
      for (String s: trues)
         System.out.println(s.matches(regex));
      System.out.println("\nFalses:");
      for (String s: falses)
         System.out.println(s.matches(regex));
      System.out.println("\n\nTrues:");
      for (String s: trues)
         System.out.println(s.matches(regex2));
      System.out.println("\nFalses:");
      for (String s: falses)
         System.out.println(s.matches(regex2));
   }
}

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