how to return to swing frame after clicking ok button of confirm dialog

Question

Select a checkbox and check if text field related to it is filled with input

 chckbxDictionary = new JCheckBox();
 txtDictionaryStartPage = new JTextField();    
 JButton btnSubmit = new JButton("Submit");
 btnSubmit.addActionListener(new ActionListener() {
 public void actionPerformed(ActionEvent e) {
      if(chckbxDictionary.isSelected()){
            if(txtDictionaryStartPage.getText().equals("")){
                    int type=JOptionPane.showConfirmDialog(null, "enter start page", "", JOptionPane.OK_CANCEL_OPTION);
                    if(type==JOptionPane.OK_OPTION){
                        //if ok return to frame and focus txtDictionaryStartPage for user input
                    }
                }
       }
  }
}

After clicking ok button on confirm dialog, I want to go back to jframe and focus the required text field for user to enter input and wait till input is entered.

Answer 1

Assuming they are in the same class, according to the JavaDoc :

public boolean requestFocusInWindow()

Requests that this Component gets the input focus. Refer to Component.requestFocusInWindow() for a complete description of this method. If you would like more information on focus, see How to Use the Focus Subsystem, a section in The Java Tutorial.

So in your case, you could do:

if(type==JOptionPane.OK_OPTION){
    txtDictionaryStartPage.requestFocusOnWindow();
}

Answer 2

If they are in same class, you can do:

 chckbxDictionary = new JCheckBox();
 txtDictionaryStartPage = new JTextField();    
 JButton btnSubmit = new JButton("Submit");
 btnSubmit.addActionListener(new ActionListener() {
 public void actionPerformed(ActionEvent e) {
      if(chckbxDictionary.isSelected()){
            if(txtDictionaryStartPage.getText().equals("")){
                    int type=JOptionPane.showConfirmDialog(null, "enter start page", "", JOptionPane.OK_CANCEL_OPTION);
                    if(type==JOptionPane.OK_OPTION){
                        txtDictionaryStartPage.requestFocusInWindow();
                        frame.setVisible(true);
                    }
                }
       }
  }
}

I am not sure that the part frame.setVisible(true); is required, but try. If you put that in your code, it doesn't hurt anyway.

Answer 3

first argument to showConfirmDialog should be changed from null , to btnSubmit

int type=JOptionPane.showConfirmDialog(btnSubmit, "enter start page", "", JOptionPane.OK_CANCEL_OPTION);
if(type==JOptionPane.OK_OPTION){
      txtDictionaryStartPage.requestFocusOnWindow();
}