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  1. import java.io.*;
  2. import java.net.*;
  3.  
  4. class Server {
  5.     public static void main(String[] args) {
  6.         try{
  7.             ServerSocket ss = new ServerSocket(6666);
  8.             Socket s = ss.accept();
  9.             DataInputStream dis = new DataInputStream(s.getInputStream());
  10.             String str = (String)dis.readUTF();
  11.             System.out.print(str);
  12.             ss.close();
  13.         }catch(Exception e){
  14.             System.out.println(e);
  15.         }
  16.     }
  17. }
  18.  
  19. class Client {
  20.     public static void main(String[] args) {
  21.         try{
  22.             Socket s = new Socket("localhost",6666);
  23.             DataOutputStream dos = new DataOutputStream(s.getOutputStream());
  24.             dos.writeUTF("Hello Server");
  25.             dos.flush();
  26.             dos.close();
  27.             s.close();
  28.         }catch(Exception e){
  29.             System.out.println(e);
  30.         }
  31.     }
  32. }
Success #stdin #stdout 0.13s 41188KB
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stdin
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Standard input is empty
stdout
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java.net.SocketException: Network is unreachable (connect failed)
https://ideone.com/4sR74y
language:
Java (HotSpot 12)
created:
327 days ago
visibility:
public

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