服務(wù)器回應(yīng)客戶端socket.send(packet);出錯(cuò)
客戶端發(fā)送到服務(wù)器后，服務(wù)器通過socket.getInetAddress()方法獲取的實(shí)例里面，IP地址是null的，求解答？
Exception in thread "main" java.lang.NullPointerException: null address || null buffer
at java.net.DualStackPlainDatagramSocketImpl.send(DualStackPlainDatagramSocketImpl.java:134)
at java.net.DatagramSocket.send(DatagramSocket.java:693)
at com.UDPServer.main(UDPServer.java:17)
2017-09-24
是不是發(fā)送的packet里沒有ip地址？創(chuàng)建發(fā)送端的DatagramPacket時(shí)要用4參數(shù)的