Ping a server : Socket « Network Protocol « Java

1. Java
2. Network Protocol
3. Socket

Ping a server

      

import java.io.DataInputStream;
import java.io.PrintStream;
import java.net.Socket;

public class Main {
  public static void main(String[] argv) throws Exception {
    Socket t = new Socket("127.0.0.1", 7);
    DataInputStream dis = new DataInputStream(t.getInputStream());
    PrintStream ps = new PrintStream(t.getOutputStream());
    ps.println("Hello");
    String str = dis.readUTF();
    if (str.equals("Hello"))
      System.out.println("Alive!");
    else
      System.out.println("Dead");
    t.close();
  }
}

   
    
    
    
    
    
  

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