打开新的JFrame时如何禁用主JFrame

Question

Example now I have a main frame contains jtable display all the customer information, and there was a create button to open up a new JFrame that allow user to create new customer. I don't want the user can open more than one create frame. Any swing component or API can do that? or how can disabled the main frame? Something like JDialog.

Answer 1

我认为当您尝试打开新的jframe时，应将此代码用于主jframe：

this.setEnabled(false);

Answer 2

I would suggest that you make your new customer dialog a modal JDialog so that you do not allow input from other dialogs/frames in your app while it is visible. Take a look at the modality tutorial for details.

Answer 3

Sorry for the late answer but have you considered the Singleton design pattern? It will return the same instance of a class whenever you want the class. So if the user wants a frame to enter the details, there will only be one frame open (same instance)

It goes something like this:

private static MySingleFrame instance = null; //global var

private MySingleFrame() { } //private constructor 
private static MySingleFrame getInstance()
{

if(instance == null)
{
instance = new MySingleFrame();
}

//returns the same instance everytime MySingleFrame.getInstance() is called
return instance; 


}

Answer 4

just use firstFrame.setVisible(false) on the first frame. This will make it hidden..

if you want a more general approach you could have a reference to the current displayed frame somewhere and change it when a new frame requests to be shown

JFrame currentFrame;

void showRequest(JFrame frame)
{
  currentFrame.setVisible(false);
  currentFrame = frame;
  currentFrame.setVisible(true);
}

Answer 5

You can use:

 private void btn_NewFormActionPerformed(java.awt.event.ActionEvent evt) { 

             this.hide();
             new Frm_NewFormUI().setVisible(true);

 }