Create socket client with Socket - Java Network

Java examples for Network:Socket

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Description

Create socket client with Socket

Demo Code

import java.io.IOException;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.Scanner;

public class Main {
  public static void main(String[] args) {
    int port = 1234;

    System.out.println("Welcome to the Bart Client\n");

    Socket s = getSocket(port);//from   w  w w . j av  a2s  . c om

    try {
      System.out.println("Connected on port " + port);

      Scanner in = new Scanner(s.getInputStream());
      PrintWriter out;
      out = new PrintWriter(s.getOutputStream(), true);

      // discard the welcome message
      in.nextLine();

      // discard the exit instructions
      in.nextLine();

      // get a quote
      out.println("get");
      String quote = in.nextLine();

      // disconnect from the server
      out.println("bye");
      s.close();

      // write the quote on the chalkboard
      for (int i = 0; i < 20; i++)
        System.out.println(quote);
    } catch (Exception e) {
      e.printStackTrace();
    }
  }

  private static Socket getSocket(int port) {
    Socket s;
    String host;
    InetAddress ip;

    Scanner sc = new Scanner(System.in);

    while (true) {
      System.out.print("What server do you want to connect to?");
      host = sc.nextLine();
      try {
        ip = InetAddress.getByName(host);
        s = new Socket(ip, port);
        return s;
      } catch (UnknownHostException e) {
        System.out.println("The host is unknown.");
      } catch (IOException e) {
        System.out.println("Network error.");
      }
    }
  }
}

class Message {
  ArrayList<String> q = new ArrayList<String>();

  public Message() {
    q.add("A");
    q.add("B");
    q.add("C");
    q.add("D");
  }

  public String getQuote() {
    int i = (int) (Math.random() * q.size());
    return q.get(i);
  }
}

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