Java : Question : Où est L'erreur ?

import javax.swing.JOptionPane;
class Humain
{
    private String Name;
    private int Age;
    public String Info;
    public void getName()
    {
        Name=JOptionPane.showInputDialog("Enter Your Name : ");
    }
    public void getAge()
    {
        Age=Integer.parseInt(JOptionPane.showInputDialog("Enter Your Age : "));
    }
    public void printInfo()
    {
        Info="Name : "+Name+"\nAge : "+Age;
        JOptionPane.showMessageDialog(null,Info,"ID",JOptionPane.INFORMATION_MESSAGE);
        System.exit(0);
    }
}
class Student extends Humain
{
    private int Number;
    public void getNumber()
    {
        Number=Integer.parseInt(JOptionPane.showInputDialog("Enter Your Number : "));
    }
    Info+="\nNumber : "+Number;
}
public class Learn
{
    public static void main(String args[])
    {
        Student Me=new Student();
        Me.getName();
        Me.getAge();
        Me.getNumber();
        Me.printInfo();
    }
}