Design a common dialog box with Java Swing

In Java swing programming, programmers can also customize dialog boxes, which can generally be inherited from the JDialog class. The following is a dialog box class code:

class Helpabout extends JDialog implements ActionListener


{


Javaword MainFrame;


JButton OKButton;


Javax.swing.Timer MyTimer;


int counter=0;


public helpabout (Javaword mainFrame)


　{


Super (MainFrame, "description of this procedure", true); True represents the modal dialog box


this.mainframe= MainFrame;


JPanel contentpanel=new JPanel ();


contentpanel.setlayout (New BorderLayout ());


JLabel imagelabel=new JLabel (New ImageIcon (". \images\javalogo.gif"));


Contentpanel.add (imagelabel,borderlayout.west);


JPanel authorinfopane=new JPanel ();


authorinfopane.setlayout (New GridLayout (1,1));


JTextArea aboutcontent=new JTextArea ("This program is a simple program that the author is learning about JAVA2 swing programming and is not used for commercial purposes." \ nthe author's contact is: \ n ");


Aboutcontent.enable (FALSE);


Authorinfopane.add (aboutcontent);


Contentpanel.add (Authorinfopane,borderlayout.north);


JPanel sysinfopane=new JPanel ();


sysinfopane.setlayout (New GridLayout (5,1));


Sysinfopane.setborder (Borderfactory.createloweredbevelborder ());


Contentpanel.add (Sysinfopane,borderlayout.center);


JLabel username=new JLabel ("The user name of this machine is:" +system.getproperty ("User.Name"));


JLabel osname=new JLabel ("The operating system of this machine is:" +system.getproperty ("Os.name"));


JLabel javaversion=new JLabel ("The version number of the Java SDK installed in this computer is:" +system.getproperty ("java.version"));


JLabel totalmemory=new JLabel ("Total number of memory possible for Java virtual machines in this computer:" +runtime.getruntime (). TotalMemory () + "bytes");


JLabel freememory=new JLabel ("The number of memory remaining in the Java Virtual machine in this computer? Quot;+runtime.getruntime (). Freememory () +" bytes ");


Sysinfopane.add (userName);


Sysinfopane.add (Osname);


Sysinfopane.add (javaversion);


Sysinfopane.add (totalmemory);


Sysinfopane.add (freememory);


JPanel okpane=new JPanel ();


okbutton=new JButton ("OK (O)", New ImageIcon (". \images\ok.gif"));


okbutton.setmnemonic (' O '); Set shortcut key to "Alt + O"


/* The following code is the rollover image of the Set case button/


Icon rollover = new ImageIcon (". \images\exit.gif");


Icon general = new ImageIcon (". \images\ok.gif");


Icon Press = new ImageIcon (". \images\help.gif");


okbutton.setrolloverenabled (TRUE);


Okbutton.seticon (General); Set the image
when leaving

Okbutton.setrollovericon (rollover); Image
When set on button

Okbutton.setpressedicon (press); Set the image
when the button is pressed

This.getrootpane (). Setdefaultbutton (OKButton); Set the button as the default button for this dialog box?


Okbutton.addactionlistener (this);


Okpane.add (OKButton);


Contentpanel.add ("South", Okpane);


Setcontentpane (Contentpanel);


//This.setresizable (FALSE); Set dialog box to be
size

mytimer=new Javax.swing.Timer (1000,this);


Mytimer.start ();


　}


public void actionperformed (ActionEvent parm1)


　{


//Todo:add your code here


if (Parm1.getsource () ==okbutton)


　　{


Dispose ();


　　}


Else if (Parm1.getsource () ==mytimer)


　　{


counter++;


This.settitle ("The value of the current timer is:" +counter+ "seconds");


　　}


　}


}

The dialog box appears in the event response code, with the following program code:

HelpAbout aboutDialog=new HelpAbout(this);
aboutDialog.setSize(500,500);
aboutDialog.show();