关于异常抛出和处理的问题 - 黑马程序员技术交流社区

import java.io.*;
import java.net.*;
class Send implements Runnable
{
private DatagramSocket ds;
public Send(DatagramSocket ds)//发送的时候要用哪一个socket不确定，所以在发送端在构造时就传一个指定的socket进来
{
this.ds = ds;
}
public void run()
{
try//请问这里为什么不抛出异常而是选择了处理异常？
{
BufferedReader bufr = new BufferedReader(new InputStreamReader(System.in));
String line = null;
while((line=bufr.readLine())!=null)
{
byte[] buf = line.getBytes();
DatagramPacket dp =
new DatagramPacket(buf,buf.length,InetAddress.getByName("192.168.1.255"),10002);
ds.send(dp);
if("886".equals(line))
break;
}
}
catch (Exception e)
{
throw new RuntimeException("发送端失败");
}
}
}
class Rece implements Runnable
{
private DatagramSocket ds;
public Rece(DatagramSocket ds)
{
this.ds = ds;
}
public void run()
{
try//<span style="line-height: 30.7999992370605px;">请问这里为什么不抛出异常而是选择了处理异常？</span>
{
while(true)
{
byte[] buf = new byte[1024];
DatagramPacket dp = new DatagramPacket(buf,buf.length);
ds.receive(dp);
String ip = dp.getAddress().getHostAddress();
String data = new String(dp.getData(),0,dp.getLength());
if("886".equals(data))
{
System.out.println(ip+"....离开聊天室");
break;
}
System.out.println(ip+":"+data);
}
}
catch (Exception e)
{
throw new RuntimeException("接收端失败");
}
}
}
class ChatDemo
{
public static void main(String[] args) throws Exception
{
DatagramSocket sendSocket = new DatagramSocket();
DatagramSocket receSocket = new DatagramSocket(10002);
new Thread(new Send(sendSocket)).start();
new Thread(new Rece(receSocket)).start();
}
}

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