package apibook.c5.s1;import java.net.*;import java.io.IOException;import java.security.AccessController;//測試SocketPermission類public class TestSocketPermission {  public TestSocketPermission() {  }  public static void main(String[] args) {    SocketPermission fp = new SocketPermission("www.163.com", "connect");    try {        AccessController.checkPermission(fp);        System.out.println(InetAddress.getByName("www.163.com"));        Socket socket = new Socket("www.163.com", 80);        socket.close();    } catch (IOException e) {        e.printStackTrace();    } catch (SecurityException e) {        e.printStackTrace();    }  }}