Java-simple notepad

JDK Version: 1.7.0

Source Code: [java] import java. io. *; import java. awt. *; import java. awt. event. *;/*** The Main Window * @ author Neo Smith */class PadFrame extends Frame {private MenuBar mb; private Menu menuFile; private Menu menuEdit; private MenuItem [] miFile; private TextArea ta; final private Frame frame = this;/*** The inner class * Message Handle */class EventExit implements ActionListener {public vo Id actionreceivmed (ActionEvent e) {System. exit (0) ;}} class SystemExit extends WindowAdapter {public void windowClosing (WindowEvent e) {System. exit (0) ;}} class EventMenuClose implements ActionListener {public void actionreceivmed (ActionEvent e) {ta. setText (null) ;}} class EventOpenFile implements ActionListener {public void actionreceivmed (ActionEvent e) {// Create the OpenFile Dialog Fi LeDialog dlg = new FileDialog (frame, "Open Files", FileDialog. LOAD); dlg. show (); String strPath; if (strPath = dlg. getDirectory ())! = Null) {// get the full path of the selected file strPath + = dlg. getFile (); // open the file try {FileInputStream FCM = new FileInputStream (strPath); BufferedInputStream bis = new BufferedInputStream (FCM); byte [] buf = new byte [3000]; int len = bis. read (buf); ta. append (new String (buf, 0, len); bis. close ();} catch (Exception ex) {ex. printStackTrace () ;}}}/*** Construction Method * Adding Menu and TextArea components * @ param strTitle */public PadFrame (String strTitle) {super (strTitle); this. setLocation (400,200); this. setSize (900,630); // Create the Menu Bar mb = new MenuBar (); menuFile = new Menu ("File"); menuEdit = new Menu ("Edit "); miFile = new MenuItem [] {new MenuItem ("Open"), new MenuItem ("Close"), new MenuItem ("Exit")}; this. setMenuBar (mb); mb. add (menuFile); mb. add (menuEdit); for (int I = 0; I <miFile. length; ++ I) {menuFile. add (miFile [I]);} // Add event handle setMenuEventHandle (new EventExit (), "File", 2); setMenuEventHandle (new EventOpenFile (), "File ", 0); setMenuEventHandle (new EventMenuClose (), "File", 1); this. addWindowListener (new SystemExit (); // add the TextArea component ta = new TextArea (30, 30); this. add (ta);} public void setMenuEventHandle (ActionListener al, String strMenu, int index) {if (strMenu = "File") {miFile [index]. addActionListener (al) ;}} public int getMenuItemAmount (String strMenu) {if ("File" = strMenu) {return miFile. length;} return-1;} public static void main (String [] args) {PadFrame f = new PadFrame ("NotePad"); f. show ();}}