我编写了一个发送数据报的客户端

这就是源码：

import java.io.*;
import java.net.*;
import java.util.*;

public class ClientTest
{
public static void main(String agrs[])
{
DatagramPacket packet;
DatagramSocket socket;

InetAddress address = InetAddress.getByName ("ServerTest");
int port=4700;
byte buf[]=new byte[32];
String s="Hello";
try
{
socket=new DatagramSocket();
s.getBytes(0,s.length(),buf,0);
packet=new DatagramPacket(buf,32,address,port);
socket.send(packet);
packet=new DatagramPacket(buf,32);
socket.receive(packet);
s=new String(packet.getData(),0);
System.out.println("Received from server:" + s);
socket.close();
}
catch(Exception e)
{
System.out.println("Exception" + e);
}
}
}

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编译后报错：

异常“java.net.UnknownHostException“未被捕获，因而未出现在throws子句中

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