src/java.base/share/classes/java/lang/Package.java

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

*** 395,409 ****
       */
      @Override
      public String toString() {
          String spec = versionInfo.specTitle;
          String ver =  versionInfo.specVersion;
!         if (spec != null && spec.length() > 0)
              spec = ", " + spec;
          else
              spec = "";
!         if (ver != null && ver.length() > 0)
              ver = ", version " + ver;
          else
              ver = "";
          return "package " + packageName() + spec + ver;
      }
--- 395,409 ----
       */
      @Override
      public String toString() {
          String spec = versionInfo.specTitle;
          String ver =  versionInfo.specVersion;
!         if (spec != null && !spec.isEmpty())
              spec = ", " + spec;
          else
              spec = "";
!         if (ver != null && !ver.isEmpty())
              ver = ", version " + ver;
          else
              ver = "";
          return "package " + packageName() + spec + ver;
      }