Web browser compiled by SWT

I want to use RCP to do this. I found it when I was searching for information, but I did not need to mention it. The Code is as follows:
Package SRC;
Import org. Eclipse. SWT. SWT;
Import org. Eclipse. SWT. browser. browser;
Import org. Eclipse. SWT. browser. closewindowlistener;
Import org. Eclipse. SWT. browser. locationevent;
Import org. Eclipse. SWT. browser. locationlistener;
Import org. Eclipse. SWT. browser. openwindowlistener;
Import org. Eclipse. SWT. browser. progressevent;
Import org. Eclipse. SWT. browser. progresslistener;
Import org. Eclipse. SWT. browser. statustextevent;
Import org. Eclipse. SWT. browser. statustextlistener;
Import org. Eclipse. SWT. browser. javaswevent;
Import org. Eclipse. SWT. Events. selectionadapter;
Import org. Eclipse. SWT. Events. selectionevent;
Import org. Eclipse. SWT. layout. formattachment;
Import org. Eclipse. SWT. layout. formdata;
Import org. Eclipse. SWT. layout. formlayout;
Import org. Eclipse. SWT. layout. griddata;
Import org. Eclipse. SWT. layout. gridlayout;
Import org. Eclipse. SWT. Widgets. Button;
Import org. Eclipse. SWT. Widgets. Combo;
Import org. Eclipse. SWT. Widgets. composite;
Import org. Eclipse. SWT. Widgets. display;
Import org. Eclipse. SWT. Widgets. label;
Import org. Eclipse. SWT. Widgets. shell;

/**
* This class implements a web browser
*/
Public class testbrowser {
// The "at rest" text of the throbber

Private Label throbber;

Private button;

Private combo URL;

Private button button_4;

Private button button_3;

Private browser;

Private browser browser2;

Private Label status;

Private button button_2;

Private button button_1;

Private Static final string at_rest = "ready ";

Private string [] urllist = new string [256];

Int urllistitemcount = 0;

/**
* Runs the application
*
* @ Param location
* The initial location to display
*/
Public void run (string location ){
Display display = New Display ();
Shell shell = new shell (Display );
Shell. settext ("advanced browser ");
Createcontents (shell, location );
Shell. open ();
While (! Shell. isdisposed ()){
If (! Display. readanddispatch ()){
Display. Sleep ();
}
}
Display. Dispose ();
}

/**
* Creates the main window's contents
*
* @ Param Shell
* The Main Window
* @ Param location
* The initial location
*/
Public void createcontents (shell, string location ){
Shell. setlayout (New formlayout ());

// Create the composite to hold the buttons and text field

Composite controls = new composite (shell, SWT. None );
Formdata DATA = new formdata ();
Data. Top = new formattachment (0, 0 );
Data. Left = new formattachment (0, 0 );
Data. Right = new formattachment (100, 0 );
Controls. setlayoutdata (data );

// Create the status bar

Status = new label (shell, SWT. None );
Data = new formdata ();
Data. Left = new formattachment (0, 0 );
Data. Right = new formattachment (100, 0 );
Data. Bottom = new formattachment (100, 0 );
Status. setlayoutdata (data );

// Create the web browser

Browser = new browser (shell, SWT. Border );
Browser. addopenwindowlistener (New openwindowlistener (){
Public void open (incluwevent arg0 ){
String urlstr = arg0.browser. geturl ();
Int flag = 1;
Browser. setvisible (false );
Browser2.setvisible (true );
Arg0.browser = browser2;
For (INT I = 0; I <urllistitemcount; I ++ ){
If (urllist [I]. Equals (urlstr )){
Flag = 0;
}
}
If (flag = 1 ){
Urllist [urllistitemcount] = urlstr;
URL. Add (urlstr );
URL. settext (urlstr );
Urllistitemcount ++;
}
}
});
Data = new formdata ();
Data. Top = new formattachment (Controls );
Data. Bottom = new formattachment (Status );
Data. Left = new formattachment (0, 0 );
Data. Right = new formattachment (100, 0 );
Browser. setlayoutdata (data );

// Create the web browser

Browser2 = new browser (shell, SWT. Border );
Browser2.addopenwindowlistener (New openwindowlistener (){
Public void open (incluwevent arg0 ){
String urlstr = arg0.browser. geturl ();
Int flag = 1;
Browser2.setvisible (false );
Browser. setvisible (true );
Arg0.browser = browser;
For (INT I = 0; I <urllistitemcount; I ++ ){
If (urllist [I]. Equals (urlstr )){
Flag = 0;
}
}
If (flag = 1 ){
Urllist [urllistitemcount] = urlstr;
URL. Add (urlstr );
URL. settext (urlstr );
Urllistitemcount ++;
}
}
});
Data = new formdata ();
Data. Top = new formattachment (Controls );
Data. Bottom = new formattachment (Status );
Data. Left = new formattachment (0, 0 );
Data. Right = new formattachment (100, 0 );
Browser2.setlayoutdata (data );

// Create the controls and wire them to the browser

Controls. setlayout (New gridlayout (7, false ));

// Create the back button

Button_1 = new button (controls, SWT. Push );
Button_1.settext ("back ");
Button_1.addselectionlistener (New selectionadapter (){
Public void widgetselected (selectionevent event ){
Browser. Back ();
}
});

// Create the forward button

Button_2 = new button (controls, SWT. Push );
Button_2.settext ("Forward ");
Button_2.addselectionlistener (New selectionadapter (){
Public void widgetselected (selectionevent event ){
Browser. Forward ();
}
});

// Create the refresh button

Button_3 = new button (controls, SWT. Push );
Button_3.settext ("refresh ");
Button_3.addselectionlistener (New selectionadapter (){
Public void widgetselected (selectionevent event ){
Browser. Refresh ();
}
});

// Create the stop button

Button_4 = new button (controls, SWT. Push );
Button_4.settext ("stop ");
Button_4.addselectionlistener (New selectionadapter (){
Public void widgetselected (selectionevent event ){
Browser. Stop ();
}
});

// Create the address entry field and set focus to it

Url = new combo (controls, SWT. arrow_down );
URL. setlayoutdata (New griddata (296, SWT. Default ));
URL. setsize (600, URL. getsize (). y );
URL. setfocus ();

// Create the go button

Button = new button (controls, SWT. Push );
Button. settext ("go ");
Button. addselectionlistener (New selectionadapter (){
Public void widgetselected (selectionevent event ){
String urlstr = URL. gettext ();
Int flag = 1;
Browser. seturl (urlstr );
For (INT I = 0; I <urllistitemcount; I ++ ){
If (urllist [I]. Equals (urlstr )){
Flag = 0;
}
}
If (flag = 1 ){
Urllist [urllistitemcount] = urlstr;
URL. Add (urlstr );
Urllistitemcount ++;
}
}
});

// Create the animated "throbber"

Throbber = new label (controls, SWT. None );
Throbber. settext (at_rest );

// Allow users to hit enter to go To the typed URL

Shell. setdefaultbutton (button );

// Add event handlers

Browser. addclosewindowlistener (New advancedclosewindowlistener ());
Browser. addlocationlistener (New advancedlocationlistener (URL ));
Browser. addprogresslistener (New advancedprogresslistener (throbber ));
Browser. addstatustextlistener (New advancedstatustextlistener (Status ));

// Go to the initial URL

If (location! = NULL ){
Browser. seturl (location );
}
}

/**
* This class implements a closewindowlistener for testbrowser
*/
Class advancedclosewindowlistener implements closewindowlistener {
/**
* Called when the parent window shoshould be closed
*/
Public void close (incluwevent event ){
// Close the parent window

(Browser) event. widget). getshell (). Close ();
}
}

/**
* This class implements a locationlistener for testbrowser
*/
Class advancedlocationlistener implements locationlistener {
// The address text box to update

Private combo location;

/**
* Constructs an advancedlocationlistener
*
* @ Param text
* The address text box to update
*/
Public advancedlocationlistener (combo text ){
// Store the address box for updates

Location = text;
}

/**
* Called before the location changes
*
* @ Param event
* The Event
*/
Public void changing (locationevent event ){
// Show the location that's loading

Location. settext ("loading" + event. Location + "...");
}

/**
* Called after the location changes
*
* @ Param event
* The Event
*/
Public void changed (locationevent event ){
// Show the loaded location

Location. settext (event. Location );
}
}

/**
* This class implements a progresslistener for testbrowser
*/
Class advancedprogresslistener implements progresslistener {
// The label on which to report progress

Private Label progress;

/**
* Constructs an advancedprogresslistener
*
* @ Param label
* The label on which to report progress
*/
Public advancedprogresslistener (label Label ){
// Store the label on which to report updates

Progress = label;
}

/**
* Called when progress is made
*
* @ Param event
* The Event
*/
Public void changed (progressevent event ){
// Avoid divide-by-zero

If (event. Total! = 0 ){
// Calculate a percentage and display it

Int percent = (INT) (event. Current/event. Total );
Progress. settext (percent + "% ");
} Else {
// Since we can't calculate a percent, show confusion

Progress. settext ("??? ");
}
}

/**
* Called when load is complete
*
* @ Param event
* The Event
*/
Public void completed (progressevent event ){
// Reset to the "at rest" Message

Progress. settext (at_rest );
}
}

/**
* This class implements a statustextlistener for testbrowser
*/
Class advancedstatustextlistener implements statustextlistener {
// The label on which to report status

Private Label status;

/**
* Constructs an advancedstatustextlistener
*
* @ Param label
* The label on which to report status
*/
Public advancedstatustextlistener (label Label ){
// Store the label on which to report status

Status = label;
}

/**
* Called when the status changes
*
* @ Param event
* The Event
*/
Public void changed (statustextevent event ){
// Report the status

Status. settext (event. Text );
}
}

/**
* The application entry point
*
* @ Param ARGs
* The command line arguments
*/
Public static void main (string [] ARGs ){
New testbrowser (). Run (ARGs. Length = 0? Null: ARGs [0]);
}
}