Form Login J2ME

import javax.microedition.midlet.MIDlet;
05.import javax.microedition.lcdui.*;
06.
07.public class login extends MIDlet implements CommandListener {
08.private Display display;
09.private TextField userName;
10.private TextField password;
11.private Form form;
12.private Command cancel;
13.private Command login;
14.


15.public login() {
16.userName = new TextField("LoginID :", "", 10, TextField.ANY);
17.password = new TextField("Password :", "", 10, TextField.PASSWORD);
18.form = new Form("Login");
19.cancel = new Command("Cancel", Command.CANCEL, 2);
20.login = new Command("Login", Command.OK, 2);
21.}
22.
23.public void startApp() {
24.form.setTitle("Silakan Login");
25.form.append(userName);
26.form.append(password);
27.form.addCommand(cancel);
28.form.addCommand(login);
29.form.setCommandListener(this);
30.display.setCurrent(form);
31.}
32.
33.public void pauseApp() {
34.}
35.
36.public void destroyApp(boolean unconditional) {
37.notifyDestroyed();
38.}
39.
40.public void validateUser(String name, String password) {
41./** "usernya" dan "passwordnya" bisa diganti sesuai keinginan*/
42.if (name.equals("usernya") && password.equals("passwordnya")) {
43.bener();
44.} else {
45.tryAgain();
46.}
47.}
48.
49.public void bener() {
50.Alert benar = new Alert("Login Sukses", "Selamat Login Sukses", null, AlertType.ERROR);
51.error.setTimeout(Alert.FOREVER);
52.display.setCurrent(error);
53.}
54.
55.public void tryAgain() {
56.Alert salah = new Alert("Login salah", "Silakan Ulangi lagi", null, AlertType.ERROR);
57.salah.setTimeout(Alert.FOREVER);
58.userName.setString("");
59.password.setString("");
60.display.setCurrent(salah, form);
61.}
62.
63.public void commandAction(Command c, Displayable d) {
64.String label = c.getLabel();
65.if(label.equals("Cancel")) {
66.destroyApp(true);
67.} else if(label.equals("Login")) {
68.validateUser(userName.getString(), password.getString());
69.}
70.}
71.}