对于该系统，主要是针对不同的人群有不同的价格，成人是原价，老人是5折，小孩是3折，其UML图如下
这里给出了每一个类的实现，运行结果如下
YongTicket类
public class YongTickt extends Ticket{
public YongTickt() {
}
public YongTickt(float price) {
this.setPrice(price);
}
@Override
public float singlePrice() {
return this.getPrice();
}
}
ChikdTicket类
public class ChildTicket extends Ticket{
public ChildTicket() {
}
public ChildTicket(float price) {
this.setPrice(0.3f*price);
}
@Override
public float singlePrice() {
return this.getPrice();
}
}
OldTicket类
public class OldTicket extends Ticket {
public OldTicket(){
}
public OldTicket(float price) {
this.setPrice(0.5f*price);
}
@Override
public float singlePrice() {
return this.getPrice();
}
}
Ticket类
public abstract class Ticket {
public float price;
public Ticket(){
}
public Ticket(float price) {
this.price = price;
}
public float getPrice() {
return price;
}
public void setPrice(float price) {
this.price = price;
}
abstract float singlePrice();
}
然后就是界面和实现了，TicketJFrame类
import java.awt.*;
public class TicketJFrame extends javax.swing.JFrame {
public TicketJFrame() {
initComponents();
}
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
private void initComponents() {
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();
jButton1 = new javax.swing.JButton();
jTextField1 = new javax.swing.JTextField();
jTextField2 = new javax.swing.JTextField();
jTextField3 = new javax.swing.JTextField();
jTextField4 = new javax.swing.JTextField();
jLabel6 = new javax.swing.JLabel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jLabel1.setText("没票标准单价 ");
jLabel2.setText("成人票");
jLabel3.setText("老人票5折");
jLabel4.setText("儿童票3折");
jLabel5.setText("总价");
jButton1.setText("计算");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
jTextField1.setText("100");
jTextField2.setText("1");
jTextField3.setText("1");
jTextField4.setText("1");
jLabel6.setText("180.0");
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addGroup(layout.createSequentialGroup()
.addGap(31, 31, 31)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel3)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel2)
.addComponent(jLabel4)
.addComponent(jLabel5))
.addGap(74, 74, 74)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel6)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(jTextField3, javax.swing.GroupLayout.DEFAULT_SIZE, 92, Short.MAX_VALUE)
.addComponent(jTextField2)
.addComponent(jTextField4))))))
.addGroup(layout.createSequentialGroup()
.addGap(14, 14, 14)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jButton1)
.addGroup(layout.createSequentialGroup()
.addComponent(jLabel1)
.addGap(52, 52, 52)
.addComponent(jTextField1, javax.swing.GroupLayout.DEFAULT_SIZE, 92, Short.MAX_VALUE)))))
.addContainerGap(164, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(30, 30, 30)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel1)
.addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(23, 23, 23)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel2)
.addComponent(jTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel3)
.addComponent(jTextField3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(28, 28, 28)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel4)
.addComponent(jTextField4, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(24, 24, 24)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel5)
.addComponent(jLabel6))
.addGap(18, 18, 18)
.addComponent(jButton1)
.addContainerGap(16, Short.MAX_VALUE))
);
pack();
}// </editor-fold>//GEN-END:initComponents
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton1ActionPerformed
// TODO add your handling code here:
//float standardPrice = Float.parseFloat(this.jLabel1.getText());
float standardPrice = Float.parseFloat(jTextField1.getText());
YongTickt yong = new YongTickt(standardPrice);
OldTicket old = new OldTicket(standardPrice);
ChildTicket child = new ChildTicket(standardPrice);
float num = (float) (yong.singlePrice()*Float.parseFloat(jTextField2.getText())
+ old.singlePrice()*Float.parseFloat(jTextField3.getText())
+ child.singlePrice()*Float.parseFloat(jTextField4.getText()));
// System.out.println(standardPrice);
// System.out.println(yong);
// System.out.println(old);
// System.out.println(child);
jLabel6.setText(String.valueOf(num));
//System.out.println("hello");
}//GEN-LAST:event_jButton1ActionPerformed
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(TicketJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(TicketJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(TicketJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(TicketJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new TicketJFrame().setVisible(true);
}
});
}
// Variables declaration - do not modify//GEN-BEGIN:variables
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.JTextField jTextField1;
private javax.swing.JTextField jTextField2;
private javax.swing.JTextField jTextField3;
private javax.swing.JTextField jTextField4;
// End of variables declaration//GEN-END:variables
}