Question: Can you provide an example of  the program to create a JFrame window:?
Answer: A example program to create a JFrame window:

// java  program to create the frame and perform the action in that  
// importing the required packages and classes  
import java.io.*;  
importjavax.swing.*;  
importjava.awt.event.*;  
importjavax.swing.filechooser.*;  
classHelloWorld extends JFrame implements ActionListener {  
  
    // declaring a Jlable to show the files whichare selected by the user  
    staticJLabel l;  
  
    // a default constructor  
    HelloWorld()  
    {  
    }  
  
    public static void main(String args[])  
    {  
        // // creating an object to the Jframe class and giving the name of the frame  
        JFrame f = new JFrame(" JavaTpoint");  
  
        // fixing the size of the frame  
        f.setSize(400, 400);  
  
        // giving the frame visibility  
        f.setVisible(true);  
          
        // closing the frame   
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  
  
        // creating a JButton to save the dialog  
        JButton b1 = new JButton("save dialog");  
  
        // creating a JButton to open the dialog  
        JButton b2 = new JButton("open dialog");  
  
        // creating an object to the HelloWorld class  
        HelloWorld f1 = new HelloWorld();  
  
        // Using action listener class to capture the response of the user using buttons  
        b1.addActionListener(f1); // adding b1 button in actionListener  
        b2.addActionListener(f1); // adding b2 button in actionListener  
  
        // Creating a panel to add buttons and labels  
        JPanel p = new JPanel();  
  
        // adding buttons to the frame  
        p.add(b1);  
        p.add(b2);  
  
        // set the label to its initial value  
        l = new JLabel("no file selected");  
  
        // adding the panel to the frame  
        p.add(l);  
        f.add(p);  
  
        f.show();  
    }  
    public void actionPerformed(ActionEvent e)  
    {  
        // if the client presses the save button, show the save dialog  
        String com = e.getActionCommand();  
  
        if (com.equals("save")) {  
            // creating an object to the JFileChooser class  
            JFileChooserjf = new JFileChooser(FileSystemView.getFileSystemView());  
  
            // calling the showsSaveDialog method to display the save dialog on the frame  
            int r = jf.showSaveDialog(null);  
  
            // if the user selects a file  
            if (r == JFileChooser.APPROVE_OPTION)  
  
            {  
                // setting the label as the path of the selected file  
                l.setText(jf.getSelectedFile().getAbsolutePath());  
            }  
            // if the user canceled the operation  
            else  
                l.setText("The user cancelled the operation");  
        }  
  
        // if the user presses the open dialog, show the open dialog  
        else {  
            // create an object of JFileChooser class  
            JFileChooserjf = new JFileChooser(FileSystemView.getFileSystemView());  
  
            // calling the showOpenDialog method to display the save dialog on the frame  
            int r = jf.showOpenDialog(null);  
  
            // if the user selects a file  
            if (r == JFileChooser.APPROVE_OPTION)  
  
            {  
                // setting the label as the path of the selected file  
                l.setText(jf.getSelectedFile().getAbsolutePath());  
            }  
            // if the user canceled the operation  
            else  
                l.setText("The user cancelled the operation");  
        }  
    }  
}