案例实现的功能：键盘录入一句话，通过udp发送给对方
代码如下：

1. <p>import java.io.IOException;
   
2. import java.net.DatagramPacket;
   
3. import java.net.DatagramSocket;</p><p>public class ReiceiveDemo {
   
4. public static void main(String[] args) throws IOException {
   
5.   DatagramSocket ds = new DatagramSocket(10087);
   
6.   byte[] bys = new byte[1024];
   
7.   DatagramPacket dp = new DatagramPacket(bys, bys.length);
   
8.   ds.receive(dp);
   
9.   String s = new String(dp.getData(), 0, dp.getLength());
   
10.   System.out.println("接收到的数据是：" + s);
    
11. }
    
12. }
    
13. </p><p> </p><p>import java.io.IOException;
    
14. import java.net.DatagramPacket;
    
15. import java.net.DatagramSocket;
    
16. import java.net.InetAddress;
    
17. import java.util.Scanner;</p><p>public class SendDemo {
    
18. public static void main(String[] args) throws IOException {
    
19.   DatagramSocket ds = new DatagramSocket();
    
20.   Scanner sc = new Scanner(System.in);
    
21.   System.out.println("请输入您要发送的数据：");
    
22.   String s = sc.nextLine();
    
23.   byte[] bys = s.getBytes();
    
24.   DatagramPacket dp = new DatagramPacket(bys, bys.length,
    
25.     InetAddress.getByName("lisa"), 10087);
    
26.   ds.send(dp);
    
27.   ds.close();
    
28. }
    
29. }
    
30. 
    
31. </p><p> </p>

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案例实现的功能：键盘录入一句话，通过udp发送给对方
代码如下：

1. <p>import java.io.IOException;
   
2. import java.net.DatagramPacket;
   
3. import java.net.DatagramSocket;</p><p>public class ReiceiveDemo {
   
4. public static void main(String[] args) throws IOException {
   
5.   DatagramSocket ds = new DatagramSocket(10087);
   
6.   byte[] bys = new byte[1024];
   
7.   DatagramPacket dp = new DatagramPacket(bys, bys.length);
   
8.   ds.receive(dp);
   
9.   String s = new String(dp.getData(), 0, dp.getLength());
   
10.   System.out.println("接收到的数据是：" + s);
    
11. }
    
12. }
    
13. </p><p> </p><p>import java.io.IOException;
    
14. import java.net.DatagramPacket;
    
15. import java.net.DatagramSocket;
    
16. import java.net.InetAddress;
    
17. import java.util.Scanner;</p><p>public class SendDemo {
    
18. public static void main(String[] args) throws IOException {
    
19.   DatagramSocket ds = new DatagramSocket();
    
20.   Scanner sc = new Scanner(System.in);
    
21.   System.out.println("请输入您要发送的数据：");
    
22.   String s = sc.nextLine();
    
23.   byte[] bys = s.getBytes();
    
24.   DatagramPacket dp = new DatagramPacket(bys, bys.length,
    
25.     InetAddress.getByName("lisa"), 10087);
    
26.   ds.send(dp);
    
27.   ds.close();
    
28. }
    
29. }
    
30. 
    
31. </p><p> </p>

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