[App] - TCPClient.java

//TCP - Cliente.java, Willian Luigi (c) CODE.ME
//Tutorial de conexão TCP: http://codeme.forumeiros.com/t40-conexao-tcpservidor-cliente#245

import java.io.*;
import java.net.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;

class Usuario extends JFrame {
    JButton conectar = new JButton("Enviar");
    JTextField txbMsg = new JTextField();
    JLabel lbl = new JLabel("");
    public Usuario() {
        super ("Setting up a connection, (C)CODE.ME");
        conectar.setBounds(240, 30, 70, 30);
        txbMsg.setBounds(10, 30, 200, 30);
        lbl.setBounds(15, 60, 200, 15);
        this.getContentPane().setLayout(null);
        this.getContentPane().add(conectar);
        this.getContentPane().add(txbMsg);
        this.getContentPane().add(lbl);
        try {
            eventoBtn(conectar);
        } catch (Exception e) {
        }
        setSize(340, 120);
        setVisible(true);
        setIconImage(new ImageIcon("fav.png").getImage());
    }

    public void eventoBtn(JButton v) {
        ActionListener click = new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                try {
                    lbl.setText(conectar(txbMsg.getText()));
                } catch (Exception o) {

                }
            }
        };

        v.addActionListener(click);
    }

    public static void main(String[] args) {
        new Usuario();
    }

    public String conectar(String msg) throws Exception {
        String resposta;
        Socket client = new Socket("127.0.0.1", 7777);
        DataOutputStream toSv = new DataOutputStream(client.getOutputStream());
        BufferedReader bufferSv = new BufferedReader(new InputStreamReader(client.getInputStream()));
        toSv.writeBytes(msg + '\n');
        resposta = bufferSv.readLine();
        System.out.println("Servidor: " + resposta);
        client.close();
        return "Servidor: " + resposta;
    }
}