编写java程序，获得指定端口的主机名，主机地址和本机地址

在java学习书看到的一个练习习题，我一直觉得他说的有语病，但照猫画虎写了一个

package checksomething;

import java.net.InetAddress;

import java.net.Socket;

public class Java19_5_1 {

public InetAddress lookport() {

InetAddress address=null;

try {

Socket socket=new Socket("121.194.11.73",1060);//输入指定端口

socket.getLocalPort();

address=socket.getInetAddress();

socket.close();

}catch(Exception e) {

e.printStackTrace();

}

return address;

}

public static void main(String[] args) {

Java19_5_1 see=new Java19_5_1();

try{

InetAddress address=see.lookport();

InetAddress myip=InetAddress.getLocalHost();

System.out.println(address.getHostName());

System.out.println(address.getHostAddress());

System.out.println(myip.getHostAddress());

}catch(Exception e) {

e.printStackTrace();

}

}

}