Develop Reference

Why components from JInternalFrame won't show properly?

I don't know which the cause. But when I tried to go to my internal frame. It won't show me the complete JComponents inside of it. It just show the JTextfields, but when I hover the mouse in my components this is the time that only it shows the JComboBox. Any help why I encounter this problem? I used GUI builder on this frame.
Structure of MainFrame.

Open elements and struct of jFrame in another like a menu

i have 5 jFrames in my java project. And i want to make like a Main Menu.
I mean, i want that the program starts with a jFrame and when i click a button insteand of open the jFrame, all the elements like labels, buttons and tables are being shown in my principal jFrame.
And if i click other button the main frame will clean and charge other jframe.
It is possible? im programming with java jdk 8 and netbeans.
Thanks
Edit:
I think who marked duplicate didn't understand my question. I don't want to open or close the frame, or other frames, I want to load the structure and components of several in the same frame. Please read my question before you start complain that is duplicated

i have 5 jFrames in my java project.
And that's a problem.
And i want to make like a Main Menu. I mean, i want that the program starts with a jFrame and when i click a button insteand of open the jFrame, all the elements like labels, buttons and tables are being shown in my principal jFrame. And if i click other button the main frame will clean and charge other jframe.
Yes this can be solved by getting the contentPane (usually a JPanel) from the JFrame whose content you want to display within the currently displayed JFrame, and making it the contentPane of the displayed JFrame, for example:
// create the new JFrame, the one whose content you wish to display
NewJFrame newJFrame = new NewJFrame();
// get its contentPane
Container newContentPane = newJFrame.getContentPane();
// add this content pane into the displayed JFrame
displayedJFrame.setContentPane(newContentPane);
// revalidate and repaint the JFrame so that its new data is well displayed
displayedJFrame.revalidate();
displayedJFrame.repaint();
// displayedJFrame.pack(); // and you might need to do this if sizes are way off
But this extra gymnastics is bulky, prone to bugs and unnecessary. You are painting yourself in a corner by having your class extend JFrame, forcing you to create and display JFrames, when often more flexibility is called for. In fact, I would venture that most of the Swing GUI code that I've created and that I've seen does not extend JFrame, and in fact it is rare that you'll ever want to do this. More commonly your GUI classes will be geared towards creating JPanels, which can then be placed into JFrames or JDialogs, or JTabbedPanes, or swapped via CardLayouts, wherever needed. This will greatly increase the flexibility of your GUI coding.
For this situation what I recommend is that you do that, that your GUI classes create JPanels, and that you add the ones that you want to swap to a JPanel that uses a CardLayout. And then whenever you want to show a different "card", call show(...) on the CardLayout object, passing in the JPanel that uses it, as well as the String key that was used when adding the "card" JPanel to the CardLayout-using JPanel. This is all well-explained in the CardLayout Tutorials.
Other useful links:
For rationale on why to avoid manually swapping please see: What's so special about CardLayout vs manual adding/removal of JPanels?
For using a CardLayout to help control a "multi-page" application with multiple classes, please see: How to Integrate Multi-page Java Desktop Application from Multiple GUI Classes

Making multiple frames in a single program

I always wondered on how can I make a program with multiple JFrames. I mean I just want one class to handle all the GUIs and stuff but how can I effectively do this? A lot of tutorials say that we make JFrame by inheriting from JFrame. But what If I want many frames?
Ex:
Title of Application in one frame with some options
Menu is one frame
Main working application is one frame
Like in a game.
But I am not sure if I am pertaining to JPanel? I am completely puzzled with the 2. I just want one un-moving frame but basically the content of the frame is changing.
When I click START for example, it will change to the gaming style of frame.

you are looking for a JFrame with a CardLayout. Some background:
A JFrame is the physical window. It comes with a title bar and three buttons: minimize, maximize, and close. Think of this as a picture frame.
A JPanel is a "content holder" of sorts. Typically, you put your other components (buttons, animations, whatever) on a JPanel, and then slap that JPanel into a JFrame. Using our picture frame example, a JPanel would be the photo paper you put in the picture frame. The other components would then be the actual contents of the picture itself, and what you have at the end is a nice picture...or in your case, an application.
Setting the JFrame to utilize a CardLayout essentially lets you have multiple JPanels inside the same JFrame at once, while still only showing one at a time. So for your application, you would have (at least) two JPanels: one for the menu, and one for the game. When the app starts, you show the MenuPanel. When the user clicks "start", you switch to the GamePanel. The MenuPanel will be put in the background and will be inaccessible until you call it to the foreground again.
If, on the other hand, you create multiple JFrames, you will have two or more physically separate windows that can be dealt with individually. This can actually be kind of cool for game development. Although it takes more time to build and link the GUI for the second window, you can then have that window affect game settings in realtime (rate of fire, bullet strength, player speed, etc.)

I think that what you are after is the Card Layout:
A CardLayout object is a layout manager for a container. It treats
each component in the container as a card. Only one card is visible at
a time, and the container acts as a stack of cards. The first
component added to a CardLayout object is the visible component when
the container is first displayed.
You can see how it is used here.
This layout manager allows you to manage situations where your frame needs to be shared across various functions. In your case for instance, you could have a functionality to handle the settings section of the game and another one to handle the actual game itself.
You could then use the manager to switch between these particular items.

you can also use Desktopane() and InternalFrame() for multiple frame.
Internalframe quite similar to Jframe but it need to setVisible(true) or show() everytime.

Which ever IDE you are using, you can create multiple JFrames in the same package, and have separate codes for each of them.
If you want to link each frame, you will have to create instances from each JFrame. for example, if when the button is pressed, we need to invoke a new Frame (that we have already created)
NewJFrame1 frame1=new NewJFrame1();
frame1.setVisible(true);
then you can decide what to with your current JFrame.
eg : (Hide, Close)

JPanel data getting changed on mouse click

I am using three JButtons in my swing application. When I click on each button, the corresponding data (formatted in JTable with JScrollPane) will display on JPanel.
Problem: when I resize the JFrame, the JPanel is replacing with default button (the button which i was clicked first) information instead of current JButton information.
My sample code:
jbutton1.addActionListener(this);
jbutton2.addActionListener(this);
public void actioPerformed(ActionEvent e){
if(e.getActionCommand.equals("button1"))
JPanel.add(table1);
}
if(e.getActionCommand.equals("button2"))
JPanel.add(table1);
}.......

Resizing the JPanel will not suddenly replace components or add other components to the panel.
My best guess (and it is a guess due to the limited information in the question) is that none of your buttons actually work and just show the wrong information.
The code you posted only contains an add without any revalidation of the layout. Consult the javadoc of the Container#add method. When you resize, the layout gets revalidated and you see what is actually contained in the JPanel.
Possible solutions:
Call invalidate and repaint on your panel as well in your ActionListener
Use a CardLayout to switch between the different components
I personally prefer the CardLayout option, but it might depend a bit on the situation.
Note that in the code you posted, you add table1 for both buttons. Might be a copy-paste problem, or a problem with your actual code.

I was unable express problem clearly.Sorry for your inconvenience.
JPanel.removeAll() method has fixed my problem.
I added this method before adding any new component to JPanel. That fixes JPanel unexpected behavior.

Refreshing the JPanel or Closing and Opening Again

I'm writing a simple slide program. In that program, I show small thumbnails of all slides in a new jpanel. In that new jpanel, after clicking 2 thumbnails, it should swap them. However, after swaping them, jpanel is not refreshing. If I create new jpanel by calling createAndShowGUI() function, it is ok, but then I need to close the old jpanel.
Below is my simple class,
http://docs.oracle.com/javase/tutorial/uiswing/examples/layout/GridLayoutDemoProject/src/layout/GridLayoutDemo.java
And in my main program if I click "slide sorter mode" button handler compile the following code
gridLayoutDemoObject.createAndShowGUI();
What is the solution and how should I make it ?
Thanks.

You didn't provide enough information to indicate how you display the images or how you swap them so its hard to give a proper answer.
I would display the images by using a JLabel (or JButton without a Border). Then when you can just use setIcon(...) to swap icons and the label will repaint itself.
Next time post an SSCCE that demonstrates the problem so we don't have to guess what you are talking about.