帮我看看好吗
// 文件名为 NetTool.java
import java.net.*;
public class NetTool{
InetAddress myIPaddress=null;
InetAddress myServer=null;
public static void main( String args[]){
NetTool mytool;
mytool=new NetTool();
System.out.println("Your host IP is: "+ mytool.getMyIP());
System.out.println("The Server IP is :"+mytool.getServerIP());
}
//取得LOCALHOST的IP地址
public InetAddress getMyIP() {
try { myIPaddress=InetAddress.getLocalHost();}
catch (UnknownHostException e) {}
return (myIPaddress);
}
//取得 www.abc.com 的IP地址
public InetAddress getServerIP(){
try {myServer=InetAddress.getByName("www.163.com");}
catch (UnknownHostException e) {}
return (myServer);
}
}
这是ping ip的程序,为什么运行是总说我缺少主要的类啊,帮我看看有没什么错误