** Use a Java program to determine the validity of a link

1. Try{
2. URL url =NewURL (url_s );
3. Httpurlconnection conn = (httpurlconnection) URL. openconnection ();
4. /**
5. * Public int getresponsecode () throws ioexception
6. * Get the status code from the HTTP Response Message.
7. * For example, for the following status lines:
8. * HTTP/1.0 200 OK
9. * HTTP/1.0 401 unauthorized
10. * 200 and 401 are returned respectively.
11. * If you cannot identify any code from the response (that is, the response is not a valid HTTP),-1 is returned.
12. *
13. * Http status code or-1 is returned.
14. */
15. IntState = conn. getresponsecode ();
16. System. Out. println (State );
17. If(State = 200 ){
18. Return True;
19. }
20. Else{
21. Return False;
22. }
23. }
24. Catch(Ioexception e ){
25. Return False;
26. }