]سلام و خشته نباشید. من کد زیر رو نوشتم و با این ارور روبرو شدم : java.lang.IllegalArgumentException.
من تازه کارم و چیزی از ارور ها نمیدونم ممنون میشم اگه کمک کنید.

private static InputStream URLInput;

    private static URL address;

    private static URLConnection myconnection;

    private static InputStream URLinfo;

    private static int c;



    public static void main(String[] args) {

        try{

            address = new URL("http:\\www.google.com");

            /*

            System.out.println("basic information :");

            System.out.println("protocol : " + address.getProtocol());

            System.out.println("port : " + address.getPort());

            System.out.println("host : " + address.getHost());

            System.out.println("default port : " + address.getDefaultPort());

            System.out.println("path : " + address.getPath());*/

            

            try{

                /* show web content*/

                myconnection = address.openConnection();

                //check to see if there is content

                int contentlength = myconnection.getContentLength();

                if (contentlength != 0){

                    System.out.print("content(s): \n\n");

                    URLinfo = myconnection.getInputStream();

                    while( (c = URLinfo.read() ) !=-1 ){

                        System.out.print((char) c);

                    }

                    URLInput.close();

                    

                }else{

                    System.out.println("sorry! there is no content");

                }

                

            }catch(Exception e){

                System.out.println(e.toString());

            }

            

            

        }catch(Exception ex){

            System.out.println(ex.toString());

        }