java常用关键词关键字，方法源码解析

 public Enumeration<URL> getResources(String name) throws IOException {
        @SuppressWarnings("unchecked")
        Enumeration<URL>[] tmp = (Enumeration<URL>[]) new Enumeration<?>[2];
        if (parent != null) {
            tmp[0] = parent.getResources(name);
        } else {
            tmp[0] = getBootstrapResources(name);
        }
        tmp[1] = findResources(name);

        return new CompoundEnumeration<>(tmp);
    }

 public static Enumeration<URL> getSystemResources(String name)
        throws IOException
    {
        ClassLoader system = getSystemClassLoader();
        if (system == null) {
            return getBootstrapResources(name);
        }
        return system.getResources(name);
    }