Link/Show Form when clicking a Button in Java

[hmimedmikrob3]

This is a continuation of Login Tutorial and Connecting to MS Access database using JCreator see here With this, I am showing you some twist that after a correct login in the program it will show another form in Java.

1. First create a java program with a filename of MainMenu.java.

2. Import the following libraries.

1. import
   
   javax.swing.*
   
   ;
   
2. import
   
   java.awt.*
   
   ;
   
3. import
   
   java.awt.event.*
   
   ;
   
4. import
   
   java.io.*
   
   ;
   

3. Initialize the following variables below.

1. JDesktopPane
   
   desktop =
   
   new
   
   JDesktopPane
   
   (
   
   )
   
   ;;
   
2. String
   
   TITLE =
   
   "This is another form"
   
   ;
   
3. JMenuBar
   
   menubar =
   
   new
   
   JMenuBar
   
   (
   
   )
   
   ;
   
4. JPanel
   
   panel_Bottom =
   
   new
   
   JPanel
   
   (
   
   )
   
   ;
   
5. JPanel
   
   panel_Top =
   
   new
   
   JPanel
   
   (
   
   )
   
   ;
   

4. Create a constructor named MainMenu.

1. public
   
   MainMenu(
   
   )
   
   {
   
2. super
   
   (
   
   "This is another form"
   
   )
   
   ;
   
3. desktop.setBackground
   
   (
   
   Color
   
   .black
   
   )
   
   ;
   
4. panel_Top.setLayout
   
   (
   
   new
   
   BorderLayout
   
   (
   
   )
   
   )
   
   ;
   
5. panel_Top.setPreferredSize
   
   (
   
   new
   
   Dimension
   
   (
   
   10
   
   ,150
   
   )
   
   )
   
   ;
   
6. 
   
7. getContentPane(
   
   )
   
   .add
   
   (
   
   panel_Top,BorderLayout
   
   .PAGE_START
   
   )
   
   ;
   
8. getContentPane(
   
   )
   
   .add
   
   (
   
   desktop,BorderLayout
   
   .CENTER
   
   )
   
   ;
   
9. getContentPane(
   
   )
   
   .add
   
   (
   
   panel_Bottom,BorderLayout
   
   .PAGE_END
   
   )
   
   ;
   
10. 
    
11. 
    
12. }
    
    ;
    

5. Create a method setMain. Instead of using the Main args, we will just use this method and will call from the Login.java.

1. public
   
   void
   
   setMain(
   
   )
   
   {
   
2. MainMenu p1=
   
   new
   
   MainMenu(
   
   )
   
   ;
   
3. p1.setSize
   
   (
   
   1275
   
   ,950
   
   )
   
   ;
   
4. p1.setLocation
   
   (
   
   2
   
   ,2
   
   )
   
   ;
   
5. p1.setVisible
   
   (
   
   true
   
   )
   
   ;
   
6. p1.setResizable
   
   (
   
   false
   
   )
   
   ;
   
7. }
   

6. In your Login.java in this this previous link see here. Add the code below.

1. if
   
   (
   
   (
   
   loginname.equalsIgnoreCase
   
   (
   
   txtuser.getText
   
   (
   
   )
   
   )
   
   )
   
   &&
   
   (
   
   loginpass.equalsIgnoreCase
   
   (
   
   txtpass.getText
   
   (
   
   )
   
   )
   
   )
   
   )
   
2. {
   
3. 
   
4. 
   
5. MainMenu menu =
   
   new
   
   MainMenu(
   
   )
   
   ;
   
6. menu.setMain
   
   (
   
   )
   
   ;
   
7. dialogmessage =
   
   "Welcome - "
   
   +
   
   loginname;
   
8. dialogtype =
   
   JOptionPane
   
   .INFORMATION_MESSAGE
   
   ;
   
9. JOptionPane
   
   .showMessageDialog
   
   (
   
   (
   
   Component
   
   )
   
   null
   
   , dialogmessage, dialogs, dialogtype)
   
   ;
   
10. txtuser.setText
    
    (
    
    ""
    
    )
    
    ;
    
11. txtpass.setText
    
    (
    
    ""
    
    )
    
    ;
    
12. dispose(
    
    )
    
    ;
    
13. 
    
14. }
    

MainMenu menu = new MainMenu() and menu.setMain() was called when the button with a correct login is clicked and it will show the MainForm.

For more inquiries and need programmer for your thesis systems in any kind of programming languages, just contact my number below.

Best Regards,

Engr. Lyndon Bermoy
IT Instructor/System Developer/Android Developer/Freelance Programmer
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E-mail:[email protected]

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