Belajar Koding

Pertama Kita Membuat 2 Kelas. Kelas Pertama Yakni  utama.java , Source Codenya sebagai berikut : import javax.microedition.lcdui.Display; import javax.microedition.midlet.*; public class utama extends MIDlet { Display display; cover cover; public utama() { display = Display.getDisplay(this); cover = new cover(this, display); } public void startApp() { display.setCurrent(cover); } public void pauseApp() { } public void destroyApp(boolean unconditional) { } public void keluar() { destroyApp(false); notifyDestroyed(); } } Kemudian Kelas Ke 2  Yakni cover.java, Source Codenya Sebagai Berikut : import javax.microedition.lcdui.Canvas; import javax.microedition.lcdui.Command; import javax.microedition.lcdui.CommandListener; import javax.microedition.lcdui.Display; import javax.microedition.lcdui.Displayable; import javax.microedition.lcdui.Graphics; public class cover extends Canvas implements CommandListener{ Display display; utama utama;...

import java.io.File; public class Main{ public static void main(String[] args) { try{ boolean success ; success = (new File("C:/Documents and Settings/Administrator/My Documents/keren/Mr.bayu")).mkdir(); if(success){ System.out.println("direktori tunggal berhasil dibuat"); }else{ System.out.println("direktori tunggal gagal dibuat"); } }catch(Exception e){ e.printStackTrace(); } } } Hasilnya :

Tampilan Aplikasinya Sebagai Berikut : Ini Source Code Lengkapnya : import javax.swing.JOptionPane; public class utama extends javax.swing.JFrame{ Runtime rt = Runtime.getRuntime(); public utama() { initComponents(); } public void tampil() { if(JOptionPane.showConfirmDialog(rootPane, "Batal?", "Konfirmasi", JOptionPane.DEFAULT_OPTION)==0) { try { rt.exec("cmd /c shutdown -a"); }catch(Exception e) { JOptionPane.showMessageDialog(rootPane, e.getMessage(), "Error", JOptionPane.ERROR_MESSAGE); } } } @SuppressWarnings("unchecked") // private void initComponents() { jPanel1 = new javax.swing.JPanel(); bshut3 = new javax.swing.JButton(); bshut1 = new javax.swing.JButton(); bshut2 = new javax.swing.JButton(); setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); setTitle("Shutdown Demo"); setLocationByPlatform(true); setResizable(false); getContentPane().setLayout(null)...