Client Side

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.sql.DataSource;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.*;
import java.net.Socket;
import java.sql.*;


public class Login {
    private Socket socket = null;
    private DataInputStream input = null;
    private DataOutputStream out = null;

    public Login(String address,int port) throws ClassNotFoundException, SQLException, IOException {
        final Connection conn;
        Class.forName("com.mysql.jdbc.Driver");
        conn  = DriverManager.getConnection("jdbc:mysql://localhost:3306/pulsaapp","root","");

        socket = new Socket(address,port);
        System.out.println("Berhasil Konke");
        Color biru = new Color(52,152,219);

        final JFrame layout = new JFrame("Pulsa App");
        layout.setSize(500,250);
        layout.setLocation(450,250);
        layout.setResizable(false);
        JPanel form = new JPanel();
        form.setLocation(20,100);
        form.setBackground(biru);
        JPanel formContent = new JPanel();
        formContent.setLayout(new GridLayout(6,1,2,10));
        formContent.setBackground(biru);

        JLabel idLabel = new JLabel("Masukkan Id :");
        idLabel.setFont(new Font("Segoe UI", Font.PLAIN,14));
        idLabel.setForeground(Color.white);

        final JTextField idText = new JTextField(15);
        idText.setBorder(BorderFactory.createEmptyBorder());

        final JLabel passLabel = new JLabel("Masukkan Password :");
        passLabel.setFont(new Font("Segoe UI", Font.PLAIN,14));
        passLabel.setForeground(Color.white);

        final JPasswordField passText = new JPasswordField(15);
        passText.setBorder(BorderFactory.createEmptyBorder());

        final JButton btn = new JButton("Login");
        btn.setBackground(Color.white);
        btn.setFont(new Font("Calibri",Font.PLAIN,14));
        btn.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                if(e.getSource() == btn) {

                    try {
                        Integer getId = Integer.valueOf(idText.getText());
                        String getPass = String.valueOf(passText.getPassword());

                        Server server = new Server();
                        server.Login(getId,getPass);
                        layout.setVisible(false);
                    } catch (ClassNotFoundException e1) {
                        e1.printStackTrace();
                    } catch (SQLException e1) {
                        e1.printStackTrace();
                    }
                    /*
                    Integer id = Integer.valueOf(idText.getText());
                    String password = String.valueOf(passText.getPassword());
                    String sql = "SELECT id,password FROM karyawan WHERE id = ? AND password = ?";
                    try {
                        PreparedStatement stmt = conn.prepareStatement(sql);
                        stmt.setInt(1,id);
                        stmt.setString(2,password);
                        ResultSet rs = stmt.executeQuery();
                        if (rs.next()) {
                            new Dashboard();
                            layout.setVisible(false);
                        } else {
                            JOptionPane.showMessageDialog(null,"ID atau Password Salah");
                        }

                    } catch (SQLException e1) {
                        e1.printStackTrace();
                    } catch (ClassNotFoundException e1) {
                        e1.printStackTrace();
                    }
                    */
                }
            }
        });

        formContent.add(idLabel);
        formContent.add(idText);
        formContent.add(passLabel);
        formContent.add(passText);
        formContent.add(btn);

        form.add(formContent);

        layout.add(form);
        layout.setVisible(true);
    }

    //SOCKET


    public static void main(String[] args) throws SQLException, ClassNotFoundException, IOException {
        new Login("127.0.0.1",5000);
    }
}