How do I add the java icon and lineup text with input?

Question

So I'm trying to get the same result, according to this picture:

I'm trying to make the bottom 2 look like the upper 2.
So the first problem is that I don't get the java icon in the title.
The second problem is that "Some text:" isn't lined with the input box.

Here is my code:

    public static void main(String[] args) {

    String input = JOptionPane.showInputDialog(null, "Some Text:", "Dialog",
            JOptionPane.PLAIN_MESSAGE);
    if(input != null)
        JOptionPane.showMessageDialog(null, "Value entered: " + input, "Message box", JOptionPane.INFORMATION_MESSAGE);
    else
        System.exit(0);
}

Answer 1

we can add Swing Component to JOptionPane . So why not creating a custom panel containing a JLabel and JTextFeild with layout ie, FlowLayout and add that panel to JOptionPane using

   JOptionPane.showConfirmDialog
   (
        frame, // main window frame
        customPanel, // custom panel containing the label and textFeild
        "My Panel with Text Feild", // Title
        JOptionPane.OK_CANCEL_OPTION, // with OK and CANCEL button
        JOptionPane.PLAIN_MESSAGE 

   ); 

A minimal working example:

import java.awt.event.*;
import javax.swing.*;

class CustomPanel extends JPanel
{
    JLabel lab;
    JTextField txtField;

    public CustomPanel() {

        lab = new JLabel("Some Text: ");
        txtField = new JTextField(20);

        add(lab);
        add(txtField);

    }

    public String getText()
    {
       return txtField.getText();
    }

}

public class JOptionPaneDemo {


    public static void main(String[] args) {

        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                CustomPanel inputPane = new CustomPanel();
               int value = JOptionPane.showConfirmDialog(null, inputPane, "Demo" ,JOptionPane.OK_CANCEL_OPTION, JOptionPane.PLAIN_MESSAGE);
               if(value == JOptionPane.OK_OPTION)
               {
                   JOptionPane.showMessageDialog(null, "Value Entered: "+inputPane.getText(), "Demo", JOptionPane.INFORMATION_MESSAGE);
               }

            }
        });
    }
}

Tutorial resource: How to make Dialogue