Feedback

package notepad;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;

public class Feedback extends JFrame implements ActionListener {
    private JTextField txtapi, txtmsg, txtsender, txtnumber;

    public Feedback() {
        setTitle("Send SMS");
        setSize(400, 300);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JPanel panel = new JPanel();
        panel.setLayout(new GridLayout(5, 2));

        JLabel labelApiKey = new JLabel("API Key:");
        txtapi = new JTextField();
        JLabel lblMessage = new JLabel("Message:");
        txtmsg = new JTextField();
        JLabel lblSender = new JLabel("Sender:");
        txtsender = new JTextField();
        JLabel lblNumber = new JLabel("Recipient Number:");
        txtnumber = new JTextField();

        JButton btnSend = new JButton("Send");
        btnSend.addActionListener(this);

        panel.add(labelApiKey);
        panel.add(txtapi);
        panel.add(lblMessage);
        panel.add(txtmsg);
        panel.add(lblSender);
        panel.add(txtsender);
        panel.add(lblNumber);
        panel.add(txtnumber);
        panel.add(new JLabel());
        panel.add(btnSend);

        add(panel);
        setVisible(true);
    }

    public void actionPerformed(ActionEvent e) {
        if (e.getActionCommand().equals("Send")) {
            try {
                String apiKey = "apikey=" + URLEncoder.encode(txtapi.getText(), "UTF-8");
                String message = "&message=" + URLEncoder.encode(txtmsg.getText(), "UTF-8");
                String sender = "&sender=" + URLEncoder.encode(txtsender.getText(), "UTF-8");
                String numbers = "&numbers=" + URLEncoder.encode(txtnumber.getText(), "UTF-8");

                HttpURLConnection conn = (HttpURLConnection) new URL("https://api.txtlocal.com/send/?").openConnection();

                String data = apiKey + numbers + message + sender;

                conn.setDoOutput(true);
                conn.setRequestMethod("POST");
                conn.setRequestProperty("Content-Length", Integer.toString(data.length()));
                conn.getOutputStream().write(data.getBytes("UTF-8"));

                BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
                StringBuffer stringBuffer = new StringBuffer();
                String line;

                while ((line = rd.readLine()) != null) {
                    JOptionPane.showMessageDialog(null, "Message sent successfully.");
                }

                rd.close();
            } catch (Exception ex) {
                JOptionPane.showMessageDialog(null, "Error: " + ex.getMessage());
            }
        }
    }

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