--- old/src/jdk.jdi/share/classes/com/sun/tools/jdi/EventSetImpl.java	2020-04-05 07:19:22.077848886 +0000
+++ new/src/jdk.jdi/share/classes/com/sun/tools/jdi/EventSetImpl.java	2020-04-05 07:19:21.430835045 +0000
@@ -425,7 +425,7 @@
         }
 
         public String className() {
-            String name = classSignature;
+            String name = classSignature.substring(1, classSignature.length() - 1);
             int index = name.indexOf(".");  // check if it's a hidden class
             if (index < 0) {
                 name = name.replace('/', '.');