src/java.base/share/classes/java/security/Signature.java

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

*** 358,368 ****
      public static Signature getInstance(String algorithm, String provider)
              throws NoSuchAlgorithmException, NoSuchProviderException {
          Objects.requireNonNull(algorithm, "null algorithm name");
          if (algorithm.equalsIgnoreCase(RSA_SIGNATURE)) {
              // exception compatibility with existing code
!             if ((provider == null) || (provider.length() == 0)) {
                  throw new IllegalArgumentException("missing provider");
              }
              Provider p = Security.getProvider(provider);
              if (p == null) {
                  throw new NoSuchProviderException
--- 358,368 ----
      public static Signature getInstance(String algorithm, String provider)
              throws NoSuchAlgorithmException, NoSuchProviderException {
          Objects.requireNonNull(algorithm, "null algorithm name");
          if (algorithm.equalsIgnoreCase(RSA_SIGNATURE)) {
              // exception compatibility with existing code
!             if (provider == null || provider.isEmpty()) {
                  throw new IllegalArgumentException("missing provider");
              }
              Provider p = Security.getProvider(provider);
              if (p == null) {
                  throw new NoSuchProviderException