public static String javaClassNameToJvmResourceName(String javaName) {
        if (javaName == null) {
            throw new NullPointerException("javaName");
        }
        final int index = javaName.indexOf('.');
        if (index == -1) {
            return javaName + CLASS_POST_FIX;
        }

        StringBuilder builder = new StringBuilder(javaName.length() + CLASS_POST_FIX.length());
        builder.append(javaName, 0, index);

        StringMatchUtils.appendAndReplace(javaName, index, '.', '/', builder);

        builder.append(CLASS_POST_FIX);
        return builder.toString();
    }
java.lang.String -> java/lang/String.class

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