Java Swing How to - Use JOptionPane.showInternalInputDialog

Question

We would like to know how to use JOptionPane.showInternalInputDialog.

Answer

import java.awt.BorderLayout;
//from   w w w. j  av a2s .  co m
import javax.swing.JButton;
import javax.swing.JDesktopPane;
import javax.swing.JFrame;
import javax.swing.JInternalFrame;
import javax.swing.JOptionPane;

public class Main {

  public static void main(String[] args) {
    JDesktopPane dp = new JDesktopPane();
    JInternalFrame inf = new JInternalFrame("Help", true, true, true,
        true);
    inf.setSize(200, 200);
    inf.setVisible(true);
    dp.add(inf);

    JButton btn = new JButton("Click");
    btn.addActionListener(e->JOptionPane.showInternalInputDialog(inf, "Hit me"));
    inf.add(btn);

    JFrame f = new JFrame();
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.setLayout(new BorderLayout());
    f.add(dp);
    f.setSize(400, 400);
    f.setVisible(true);
  }

}