src/java.base/share/classes/java/time/ZoneId.java

rev 52979 : 8215281: Use String.isEmpty() when applicable in java.base
Reviewed-by: TBD

@@ -370,11 +370,11 @@
      *     "GMT", "UTC", or "UT", or ""
      */
     public static ZoneId ofOffset(String prefix, ZoneOffset offset) {
         Objects.requireNonNull(prefix, "prefix");
         Objects.requireNonNull(offset, "offset");
-        if (prefix.length() == 0) {
+        if (prefix.isEmpty()) {
             return offset;
         }
 
         if (!prefix.equals("GMT") && !prefix.equals("UTC") && !prefix.equals("UT")) {
              throw new IllegalArgumentException("prefix should be GMT, UTC or UT, is: " + prefix);