diff -r e10a1f7aaa13 -r 8bf9268df0e2 src/java.base/share/classes/javax/crypto/Cipher.java
--- a/src/java.base/share/classes/javax/crypto/Cipher.java	Thu Dec 13 16:14:07 2018 +0100
+++ b/src/java.base/share/classes/javax/crypto/Cipher.java	Thu Dec 13 15:31:05 2018 +0100
@@ -341,7 +341,7 @@
             throw new NoSuchAlgorithmException("Invalid transformation " +
                                            "format:" + transformation);
         }
-        if ((parts[0] == null) || (parts[0].length() == 0)) {
+        if ((parts[0] == null) || (parts[0].isEmpty())) {
             throw new NoSuchAlgorithmException("Invalid transformation:" +
                                    "algorithm not specified-"
                                    + transformation);
@@ -445,10 +445,10 @@
         String alg = parts[0];
         String mode = parts[1];
         String pad = parts[2];
-        if ((mode != null) && (mode.length() == 0)) {
+        if ((mode != null) && (mode.isEmpty())) {
             mode = null;
         }
-        if ((pad != null) && (pad.length() == 0)) {
+        if ((pad != null) && (pad.isEmpty())) {
             pad = null;
         }
 
@@ -634,7 +634,7 @@
         if ((transformation == null) || transformation.isEmpty()) {
             throw new NoSuchAlgorithmException("Null or empty transformation");
         }
-        if ((provider == null) || (provider.length() == 0)) {
+        if ((provider == null) || (provider.isEmpty())) {
             throw new IllegalArgumentException("Missing provider");
         }
         Provider p = Security.getProvider(provider);