java抽象类实现计算景区门票

需要为一个景区实现计算景区门票的程序，已知成年人的门票价格是100元，儿童票打3折，老年票打5折。使用抽象类来为任意多张不同类型的票计算总价。其UML类图如下所示。

程序实现结果如下图所示：

要求：给出程序具体的实现代码，程序运行正确稳定。

 

//package en.edu.shengda;
/**
 *
 * @author 201705050153 张宜强
 */
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;

abstract class Ticket {
    private float price;
    public Ticket() {
        this.price=100;
    }
    public Ticket (float price) {
        this.price=price;
    }
    public float getPrice() {
        return price;
    }
    public abstract float singlePrice();
}
class YoungTicket extends Ticket{
        public float singlePrice() {
            return this.getPrice();
        }
        public YoungTicket() {
            
        }
        public YoungTicket(float price) {
            super(price);
        }
}
class OldTicket extends Ticket{
        public float singlePrice() {
            return (float) (this.getPrice()*0.5);
        }
        public OldTicket() {
            
        }
        public OldTicket(float price) {
            super(price);
        }
}
class ChildTicket extends Ticket{
        public float singlePrice() {
            return (float) (this.getPrice()*0.3);
        }
        public ChildTicket() {
            
        }
        public ChildTicket(float price) {
            super(price);
        }
}

public class Main extends javax.swing.JFrame {
    
    public Main() {
        initComponents();
    }
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        jScrollBar1 = new javax.swing.JScrollBar();
        jScrollPane1 = new javax.swing.JScrollPane();
        jTextPane1 = new javax.swing.JTextPane();
        jScrollPane3 = new javax.swing.JScrollPane();
        jTextPane2 = new javax.swing.JTextPane();
        jScrollPane4 = new javax.swing.JScrollPane();
        jTextPane3 = new javax.swing.JTextPane();
        jScrollPane5 = new javax.swing.JScrollPane();
        jTextPane4 = new javax.swing.JTextPane();
        jButton1 = new javax.swing.JButton();
        jButton1.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
               
               String YoungNumber = jTextPane1.getText(); 
               int a=Integer.parseInt(YoungNumber);
               String OldNumber = jTextPane2.getText(); 
               int b=Integer.parseInt(OldNumber);
               String ChildNumber = jTextPane3.getText(); 
               int c=Integer.parseInt(ChildNumber);
               YoungTicket Ticket1= new YoungTicket();
               OldTicket Ticket2= new OldTicket();
               ChildTicket Ticket3= new ChildTicket();
               float TotalPrice = Ticket1.singlePrice()*a + Ticket2.singlePrice()*b + Ticket3.singlePrice()*c;
               String ans = Float.toString(TotalPrice);
               jTextPane4.setText(ans);
            }
        });
        jLabel1 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();
        jLabel3 = new javax.swing.JLabel();
        jLabel4 = new javax.swing.JLabel();
        jLabel5 = new javax.swing.JLabel();
        jLabel6 = new javax.swing.JLabel();
        jLabel7 = new javax.swing.JLabel();
        jLabel8 = new javax.swing.JLabel();
        jLabel9 = new javax.swing.JLabel();
        jTextField1 = new javax.swing.JTextField();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jScrollPane1.setViewportView(jTextPane1);

        jScrollPane3.setViewportView(jTextPane2);

        jScrollPane4.setViewportView(jTextPane3);

        jScrollPane5.setViewportView(jTextPane4);

        jButton1.setText("计算");

        jLabel1.setText("张");

        jLabel2.setText("张");

        jLabel3.setText("张");

        jLabel4.setText("元");

        jLabel5.setText("成年票:");

        jLabel6.setText("门票标准单价:");

        jLabel7.setText("老年票:");

        jLabel8.setText("儿童票:");

        jLabel9.setText("总价:");

        jTextField1.setText("100");

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(53, 53, 53)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(jLabel6)
                            .addComponent(jLabel5, javax.swing.GroupLayout.PREFERRED_SIZE, 222, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(jLabel8)
                            .addComponent(jLabel7, javax.swing.GroupLayout.PREFERRED_SIZE, 42, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(jLabel9))
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 6, Short.MAX_VALUE)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addGroup(layout.createSequentialGroup()
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
                                    .addComponent(jScrollPane5, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 59, Short.MAX_VALUE)
                                    .addComponent(jScrollPane4, javax.swing.GroupLayout.Alignment.LEADING)
                                    .addComponent(jScrollPane3, javax.swing.GroupLayout.Alignment.LEADING)
                                    .addComponent(jScrollPane1, javax.swing.GroupLayout.Alignment.LEADING))
                                .addGap(18, 18, 18)
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                    .addComponent(jLabel1)
                                    .addComponent(jLabel2)
                                    .addComponent(jLabel3)
                                    .addComponent(jLabel4)))
                            .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, 79, javax.swing.GroupLayout.PREFERRED_SIZE))
                        .addGap(108, 108, 108))
                    .addGroup(layout.createSequentialGroup()
                        .addComponent(jButton1)
                        .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addGap(48, 48, 48)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                            .addComponent(jLabel6)
                            .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                        .addGap(40, 40, 40)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addGroup(layout.createSequentialGroup()
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                                    .addComponent(jScrollPane1)
                                    .addComponent(jLabel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                    .addComponent(jScrollPane3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                                    .addComponent(jLabel2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)))
                            .addGroup(layout.createSequentialGroup()
                                .addComponent(jLabel5, javax.swing.GroupLayout.DEFAULT_SIZE, 16, Short.MAX_VALUE)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                                .addComponent(jLabel7, javax.swing.GroupLayout.PREFERRED_SIZE, 31, javax.swing.GroupLayout.PREFERRED_SIZE)))
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(jLabel3, javax.swing.GroupLayout.DEFAULT_SIZE, 25, Short.MAX_VALUE)
                            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                                .addComponent(jLabel8)
                                .addComponent(jScrollPane4, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)))
                        .addGap(18, 18, 18)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                            .addComponent(jScrollPane5, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(jLabel9)))
                    .addGroup(layout.createSequentialGroup()
                        .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                        .addComponent(jLabel4)))
                .addGap(37, 37, 37)
                .addComponent(jButton1)
                .addContainerGap())
        );

        pack();
    }// </editor-fold>                        

    public static void main(String args[]) {
   
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new Main().setVisible(true);
                //System.out.println(jTextPane1.getText());
            }
        });
    }
    // Variables declaration - do not modify                     
    private javax.swing.JButton jButton1;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JLabel jLabel4;
    private javax.swing.JLabel jLabel5;
    private javax.swing.JLabel jLabel6;
    private javax.swing.JLabel jLabel7;
    private javax.swing.JLabel jLabel8;
    private javax.swing.JLabel jLabel9;
    private javax.swing.JScrollBar jScrollBar1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JScrollPane jScrollPane3;
    private javax.swing.JScrollPane jScrollPane4;
    private javax.swing.JScrollPane jScrollPane5;
    private javax.swing.JTextField jTextField1;
    private javax.swing.JTextPane jTextPane1;
    private javax.swing.JTextPane jTextPane2;
    private javax.swing.JTextPane jTextPane3;
    private javax.swing.JTextPane jTextPane4;
    // End of variables declaration                   
}

程序运行结果: