UTP传输
public class Send1 {
public static void main(String[] args) throws Exception {
Scanner sc=new Scanner(System.in);
DatagramSocket socket=new DatagramSocket();//码头
while(true){
String str=sc.nextLine();
if("quit".equals(str)){
break;
}
DatagramPacket packet=new DatagramPacket(str.getBytes(),str.length(), InetAddress.getByName("127.0.0.1"),6666);//集装箱
socket.send(packet);
}
socket.close();
}
}
class Receive{
public static void main(String[] args) throws IOException {
DatagramSocket socket=new DatagramSocket(6666);
DatagramPacket packet=new DatagramPacket(new byte[1024],1024);//接受长度设置为1024
while (true){
socket.receive(packet);
byte[] arr=packet.getData();
int len=packet.getLength(); //获取有效字节个数
String ip=packet.getAddress().getHostAddress(); //获取IP地址
int port = packet.getPort(); //获得端口号
System.out.println(new String(arr,0,len)+" "+"IP:"+ip+" "+"port:"+port);
}
}
}
使用多线程在同一窗口下完成
public class Demo3_MoreThread {
/**
* @param args
*/
public static void main(String[] args) {
new Receive().start();
new Send().start();
}
}
class Receive extends Thread {
public void run() {
try {
DatagramSocket socket = new DatagramSocket(6666); //创建socket相当于创建码头
DatagramPacket packet = new DatagramPacket(new byte[1024], 1024); //创建packet相当于创建集装箱
while(true) {
socket.receive(packet); //接收货物
byte[] arr = packet.getData();
int len = packet.getLength();
String ip = packet.getAddress().getHostAddress();
System.out.println(ip + ":" + new String(arr,0,len));
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
class Send extends Thread {
public void run() {
try {
DatagramSocket socket = new DatagramSocket(); //创建socket相当于创建码头
Scanner sc = new Scanner(System.in);
while(true) {
String str = sc.nextLine();
if("quit".equals(str))
break;
DatagramPacket packet = //创建packet相当于创建集装箱
new DatagramPacket(str.getBytes(), str.getBytes().length, InetAddress.getByName("127.0.0.1"), 6666);
socket.send(packet); //发货
}
socket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
