--- a/src/java.base/share/classes/com/sun/java/util/jar/pack/ConstantPool.java	Fri Dec 07 17:11:17 2018 +0100
+++ b/src/java.base/share/classes/com/sun/java/util/jar/pack/ConstantPool.java	Fri Dec 07 11:51:17 2018 -0500
@@ -1366,7 +1366,7 @@
             }
             if (tag == CONSTANT_Utf8) {
                 // Special case:  First Utf8 must always be empty string.
-                assert(cpMap.length == 0 || cpMap[0].stringValue().equals(""));
+                assert(cpMap.length == 0 || cpMap[0].stringValue().isEmpty());
             }
             indexByTag[tag] = ix;
             // decache indexes derived from this one: