Swing Programming for Java program testing

 Packageswingtest;Importjava.awt.BorderLayout;Importjava.awt.event.ActionEvent;ImportJava.awt.event.ActionListener;Importjavax.swing.*; Public classHelloAppextendsjframe{ Public Static voidmain (String [] args) {Swingutilities.invokelater (NewRunnable () { Public voidrun () {HelloApp Inst=NewHelloApp (); Inst.setlocationrelativeto (NULL); Inst.setvisible (true);            }        }                ); }     PublicHelloApp () {Super();    Initgui (); }        Private voidInitgui () {Try{setdefaultcloseoperation (windowconstants.dispose_on_close); JMenuBar mbar=NewJMenuBar ();            Setjmenubar (mbar); JMenu Mfile=NewJMenu ();            Mbar.add (Mfile); Mfile.settext ("File"); JMenuItem Showhello=NewJMenuItem ();            Mfile.add (Showhello); Showhello.settext ("Hello"); Showhello.addactionlistener (NewActionListener () { Public voidactionperformed (ActionEvent e) {Joptionpane.showmessagedialog (NULL, "Hello World", "This is a message dialog", joptionpane.default_option);                        }            }            ); JMenuItem Exitem=NewJMenuItem ();            Mfile.add (Exitem); Exitem.settext ("Exit");            Pack (); SetSize (400,300); JToolBar ToolBar=NewJToolBar ();            Getcontentpane (). Add (Toolbar,borderlayout.south); JButton Binbar=NewJButton ();            Toolbar.add (Binbar); Binbar.settext ("Say Hello"); JTextField TEXTF=NewJTextField ();            Getcontentpane (). Add (Textf,borderlayout.north); Textf.settext ("Please input the text"); }        Catch(Exception e) {e.printstacktrace (); }    }    }

Swing Programming for Java program testing