Hello, Java World!

Title

this is text.

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package practice.network;

import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;

public class MainClass {

	public static void main(String[] args) throws IOException {
		ServerSocket ss = null;
		Socket s = null;
		
		ss = new ServerSocket(9000);
		System.out.println(" -- ready to welcome client -- ");
		
		s = ss.accept();
		System.out.println(" -- success to be connected with client -- ");
		System.out.println("socket: " + s);
		
		if(s != null) s.close();
		if(ss != null) ss.close();
		
	}

}