Java SWT implements the simplest adder

Practice Practicing ~ ~

Http://zhidao.baidu.com/question/24470286.html learned it from here.

Difficulty: How to convert an input string into a double type

Related code:

Import Org.eclipse.swt.SWT;
	public class Test {protected Shell shell;
	Private Text T1;
	Private Text T2;


	Private Text T3;
	 /** * Launch the application.
			* @param args */public static void main (string[] args) {try {test window = new test ();
		window.open ();
		catch (Exception e) {e.printstacktrace ();
	 }/** * Open the window.
		* * public void Open () {Display display = Display.getdefault ();
		Createcontents ();
		Shell.open ();
		Shell.layout ();
			while (!shell.isdisposed ()) {if (!display.readanddispatch ()) {display.sleep ();
	 }}/** * Create contents of the window.
		*/protected void createcontents () {shell = new shell ();
		Shell.setsize (450, 300);
		
		Shell.settext ("SWT application"); Button B1 = New button (Shell, SWT.
		NONE);
				    B1.addselectionlistener (New Selectionadapter () {@Override public void widgetselected (Selectionevent e) {
				    Double A1 = double.parsedouble (T1.gettext ()); Double A2= Double.parsedouble (T2.gettext ());    
				   T3.settext (string.valueof (A1+A2));			
			
			
	
		}


				  });
		B1.setbounds (0, 10, 80, 27);
		
		B1.settext ("Begin"); T1 = new Text (Shell, SWT.
		BORDER);
		
		T1.setbounds (7, 65, 73, 23); t2 = new Text (Shell, SWT.
		BORDER);
		
		T2.setbounds (155, 65, 73, 23); T3 = new Text (Shell, SWT.
		BORDER);
		
	
		T3.setbounds (304, 65, 73, 23); Label Lblnewlabel = new label (Shell, SWT.
		NONE);
		Lblnewlabel.setbounds (123, 68, 61, 17);
		
		Lblnewlabel.settext ("+"); Label Lblnewlabel_1 = new label (Shell, SWT.
		NONE);
		Lblnewlabel_1.setbounds (259, 68, 61, 17);


	Lblnewlabel_1.settext ("=");
 }


}