private static String stackTraceElementToString(final StackTraceElement st) {
        String shortClassName = st.getClassName();
        final int idx = shortClassName.lastIndexOf(".");
        if (idx >= 0) {
            shortClassName = shortClassName.substring(idx + 1);
        }
        return shortClassName + "." + st.getMethodName() + ":" + st.getLineNumber();
    }
Returns compact info about caller of Log method. Note: this method is considerably slow
and shall be used with care (only when explicitely turned on)
main/src/main/java/cgeo/geocaching/utils/Log.java