Java

public synchronized class FlightApp extends javax.swing.JFrame implements java.awt.event.ActionListener {
    javax.swing.JTextField pname;
    javax.swing.JTextField seat;
    javax.swing.JTextField price;
    javax.swing.JComboBox firstclass;
    javax.swing.JRadioButton one;
    javax.swing.JRadioButton two;
    javax.swing.ButtonGroup buttongroup;
    javax.swing.JPanel first;
    javax.swing.JPanel second;
    javax.swing.JPanel third;
    javax.swing.JLabel l1;
    javax.swing.JLabel l2;
    javax.swing.JLabel l3;
    javax.swing.JLabel l4;
    javax.swing.JLabel l5;
    javax.swing.JLabel l6;
    javax.swing.JLabel l7;
    java.awt.Font font1;
    java.awt.Font font2;
    javax.swing.JButton button1;
    javax.swing.JButton button2;
    javax.swing.JButton button3;
    Reserv passenger;
    public void FlightApp();
    public void actionPerformed(java.awt.event.ActionEvent);
    public static void main(String[]);
}