怎么在catch到SocketException时把socket给close?

[kekan]

代码如下：

try {
DatagramSocket receiveSocket = new DatagramSocket(7878);
receiveSocket.setSoTimeout(7000);
DatagramPacket packetIn = new DatagramPacket(byteIo,508);
receiveSocket.receive(packetIn);
receiveSocket.close();
} catch(SocketTimeoutException ex) {
System.out.println(ex);
//如何在这里将receiveSocket给close掉
} catch(SocketException ex) {
System.out.println(ex);
} catch(IOException ex) {
System.out.println(ex);
}

[u22]

receiveSocket=null;
或者
finally{
receiveSocket=null;
}

[kekan]

我试过，这样不行，编译时产生variable receiveSocket错误？
这是为什么啊？

[phsea]

finally{
try{
if (socket != null )
socket.close();
socket = null ;
}catch(Exception e){}
}

或者把try代码放到你的exception里面也可

[kekan]

没有用啊，只要receiveSocket不和DatagramSocket receiveSocket = new DatagramSocket(7878)写在同一个try里面，就会产生variable receiveSocket的错误？

[yoken]

DatagramSocket receiveSocket = null;
DatagramPacket packetIn = null;
try {
receiveSocket = new DatagramSocket(7878);
receiveSocket.setSoTimeout(7000);
packetIn = new DatagramPacket(byteIo,508);
receiveSocket.receive(packetIn);
} catch(SocketTimeoutException ex) {
System.out.println(ex);
receiveSocket.close();
} catch(SocketException ex) {
System.out.println(ex);
} catch(IOException ex) {
System.out.println(ex);
}

[u22]

那就都关掉？？