private static String toObjectType(String signature, int startIndex) {
        // Ljava/lang/String;
        final String assistClass = signature.substring(startIndex, signature.length() - 1);
        final String objectName = jvmNameToJavaName(assistClass);
        if (objectName.isEmpty()) {
            throw new IllegalArgumentException("invalid signature. objectName not found :" + signature);
        }
        return objectName;
    }
java/lang/String -> java.lang.String

@param jvmNameArray
@return
agent-module/profiler/src/main/java/com/navercorp/pinpoint/profiler/util/JavaAssistUtils.java