用java取得本机的ip和机器名

//iplabel.java
import java.net.*;
import java.awt.*;
import javax.swing.*;
public class iplabel
{
JFrame frame;
JLabel label1,label2;
JPanel panel;
String ip,address;

public void getip()
{
try
{
InetAddress addr = InetAddress.getLocalHost();
ip=addr.getHostAddress().toString();//获得本机IP
address=addr.getHostName().toString();//获得本机名称


//System.out.println("addr=:"+String.valueOf(addr));
}
catch(Exception e)
{
System.out.println("Bad IP Address!"+e);
}
}

public void showframe()
{
frame=new JFrame("my ip");
label1=new JLabel("this my ip");
label1.setText(ip);
label2=new JLabel("this my address");
label2.setText(address);
panel=new JPanel();
panel.add(label1);
panel.add(label2);
frame.getContentPane().add(panel);

frame.setSize(400,300);
frame.setVisible(true);
}

public static void main(String agrs[])
{
iplabel myip=new iplabel();
myip.getip();
myip.showframe();

}
}