src/java.base/share/classes/sun/net/TransferProtocolClient.java

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

*** 74,84 ****
              replyBuf.setLength(0);
              if (debug) {
                  System.out.print(response);
              }
  
!             if (response.length() == 0) {
                  code = -1;
              } else {
                  try {
                      code = Integer.parseInt(response, 0, 3, 10);
                  } catch (NumberFormatException e) {
--- 74,84 ----
              replyBuf.setLength(0);
              if (debug) {
                  System.out.print(response);
              }
  
!             if (response.isEmpty()) {
                  code = -1;
              } else {
                  try {
                      code = Integer.parseInt(response, 0, 3, 10);
                  } catch (NumberFormatException e) {