Simple GUI

import javax.swing.JOptionPane;
public class GuiBasics {

    public static void main(String[] args) {

        String name  = JOptionPane.showInputDialog("Enter your name");
        JOptionPane.showMessageDialog(null,"Hello "+name);

        int age = Integer.parseInt(JOptionPane.showInputDialog("Enter your age"));
        JOptionPane.showMessageDialog(null,"You are  "+age+ " years old.");

        double height = Double.parseDouble(JOptionPane.showInputDialog("Enter your height"));
        JOptionPane.showMessageDialog(null,"You are  "+height+ " cm tall.");

    }

}