Aplikasi Login dan Nilai

ROGRAM APLIKASI NILAI

1.  buat project baru dengan nama nilai pada wireless toolkit
2. ketik program nilai menggunakan notepad++ atau textpad

import javax.microedition.midlet.MIDlet;
import javax.microedition.lcdui.*;
public class nilai extends MIDlet implements CommandListener{
  private Display display;
  private TextField userName,password;
  public Form form;
  private Command login,cancel;
  private Image img, imge, img2;
  Command cmdExit,cmdBack,cmdHitung;
  Display dis;
  Form frmInput,frmOutput;
  TextField tfMakul,tfNilai;
  StringItem siMakul,siSKS,siNilai,siGrade,siBobot;
  ChoiceGroup cg1;

  public nilai() {
    form = new Form("Sign in");
    userName = new TextField("LoginID:", "", 30, TextField.ANY);
    password = new TextField("Password:", "", 30, TextField.PASSWORD);
    cancel = new Command("Cancel", Command.CANCEL, 2);
    login = new Command("Login", Command.OK, 2);
    try{
      img = Image.createImage("/logo.png");
      imge = Image.createImage("/gagal.png");
      img2 = Image.createImage("/sukses.png");
    }catch(Exception e){
      System.out.println(e.getMessage());
    }
    cmdExit = new Command("Keluar",Command.EXIT,0);
    cmdBack = new Command("OK",Command.SCREEN,0);
    cmdHitung = new Command("Proses",Command.SCREEN,0);
    cg1=new ChoiceGroup("SKS",Choice.EXCLUSIVE);
    cg1.append("2 SKS",null);
    cg1.append("4 SKS",null);
    cg1.append("6 SKS",null);
    frmInput=new Form("Form Input");
    tfMakul = new TextField("Mata Kuliah","",30,TextField.ANY);
    tfNilai = new TextField("Nilai","",30,TextField.NUMERIC);
    frmInput.append(tfMakul);
    frmInput.append(cg1);
    frmInput.append(tfNilai);
    frmInput.addCommand(cmdExit);
    frmInput.addCommand(cmdHitung);
    frmInput.setCommandListener(this);
    frmOutput=new Form("Form Output");
    siMakul=new StringItem("Mata Kuliah","");
    siSKS=new StringItem("SKS","");
    siNilai=new StringItem("Nilai","");
    siGrade=new StringItem("Grade","");
    siBobot=new StringItem("Bobot Nilai",null);
    frmOutput.append(siMakul);
    frmOutput.append(siSKS);
    frmOutput.append(siNilai);
    frmOutput.append(siGrade);
    frmOutput.append(siBobot);
    frmOutput.addCommand(cmdBack);
    frmOutput.setCommandListener(this);
  }
   public void startApp() {
    display = Display.getDisplay(this);
    try{form.append(img);}catch(Exception e){}
    form.append(userName);
    form.append(password);
    form.addCommand(cancel);
    form.addCommand(login);
    form.setCommandListener(this);
    display.setCurrent(form);

  }
  public void pauseApp() {}
  public void destroyApp(boolean unconditional) {
  notifyDestroyed();
    }
    public void validateUser(String name, String password) {
      if (name.equals("kakcik") && password.equals("211")) {
        showMsg();
      } else {
        tryAgain();
      }
    }
    public void showMsg() {
     dis = Display.getDisplay(this);
     dis.setCurrent(frmInput);
    }
    public void tryAgain() {
      Alert error = new Alert("Login salah", "coba lagi", imge, AlertType.ERROR);
      error.setTimeout(900);
      error.setImage(imge);
      userName.setString("");
      password.setString("");
      display.setCurrent(error, form);
    }

    public void commandAction(Command c, Displayable d) {
      String label = c.getLabel();
      if(label.equals("Cancel")) {
        destroyApp(true);
      } else if(label.equals("Login")) {
        validateUser(userName.getString(), password.getString());
      }
      if(c==cmdBack){
      dis.setCurrent(frmInput);
      }else if(c==cmdHitung){
      int nilai,nilaigrade,bobotnilai,sks;
      siMakul.setText(tfMakul.getString());
      if(cg1.isSelected(0)){
      siSKS.setText("2 SKS");
      sks=2;
      }else if(cg1.isSelected(1)){
      siSKS.setText("4 SKS");
      sks=4;
      }else{
      siSKS.setText("6 SKS");
      sks=6;
      }
      siNilai.setText(tfNilai.getString());
      nilai=Integer.parseInt(tfNilai.getString());
      if(nilai<=49){
      siGrade.setText("E");
      nilaigrade=0;
      }else if(nilai<=59){
      siGrade.setText("D");
      nilaigrade=1;
      }else if(nilai<=74){
      siGrade.setText("C");
      nilaigrade=2;
      }else if(nilai<=80){
      siGrade.setText("B");
      nilaigrade=3;
      }else{
      siGrade.setText("A");
      nilaigrade=4;
      }
      bobotnilai=sks*nilaigrade;
      siBobot.setText(Integer.toString(bobotnilai));
      dis.setCurrent(frmOutput);
      }else if(c==cmdExit){
      destroyApp(false);
      notifyDestroyed();
      }else{
      dis.setCurrent(frmInput);
}
    }
}

3. setelah selesai build program tersebut lalu pilih run