Processing Large Files in Java, Variation 4

ReadFileJavaApplicationBufferedReader.diff34.java

--- ReadFileJavaApplicationBufferedReader3.java  2019-01-05 20:40:01.000000000 -0800
+++ ReadFileJavaApplicationBufferedReader4.java 2019-01-05 20:40:05.000000000 -0800
@@ -45,7 +45,7 @@
        Instant commonNameStart = Instant.now();
        ArrayList<String> firstNames = new ArrayList<>();
 
-         var namePat = Pattern.compile(", \\s*(([^ ]*), |([^ ]+))");
+         var namePat = Pattern.compile(", \\s*([^, ]+)");
 
          System.out.println("Reading file using " + Caller.getName());
 
@@ -59,11 +59,7 @@
 
                  var matcher = namePat.matcher(name);
                  if (matcher.find()) {
-                     String s = matcher.group(2);
-                     if (s == null) {
-                         s = matcher.group(3);
-                     }
-                     firstNames.add(s);
+                     firstNames.add(matcher.group(1));
                  }
 
                String rawDate = array1[4].strip();