先定义 汽车保险接口 AutoInsurance
package com.glut.demo;
/**
* 汽车保险
* 接口
* @author qichunlin
*
*/
public interface AutoInsurance {
abstract String getInfo();
}
定义具体类型去实现汽车保险的接口
package com.glut.demo;
/**
*
* 车身喷油嘴
* 实现类
* @author qichunlin
*
*/
public class BodyInjur implements AutoInsurance{
private String description;//说明
@Override
public String getInfo() {
description = " Body Injur Liability:
Bodily injury coverage pays for medical bills" +
" lost wages, rehabilitation, treatment and/or" +
" funeral costs for anyone injured or killed " +
" by your car. Such coverage will also pay for" +
" pain and suffering damages when a third " +
" party successfully sues. ";
return description;//注意这里返回的是一个对象
}
}
再定义另外一个工厂接口 PolicyProducer
package com.glut.demo;
/**
* This is a sub class in the factory class hierarchy PolicyProducer
*
* 实现接口PolicyProducer 的类
*
* @author qichunlin
*
*/
public class BodyPolicy implements PolicyProducer{
@Override
public AutoInsurance getInsurObj() {
return new BodyInjur();
}
}
package com.glut.demo;
public class LuxuryCarPolicy implements PolicyProducer{
@Override
public AutoInsurance getInsurObj() {
return new LuxuryCarInjur();
}
}
测试类 客户端的GUI ，用户选择相应的保险显示在屏幕上
package com.glut.demo;
/**
*
* This is a client class that
* uses the factory method pattern
* @author qichunlin
*
*/
import java.awt.event.*;
import java.awt.*;
import java.net.*;
import javax.swing.*;
import javax.swing.BorderFactory;
import javax.swing.border.Border;
import java.io.File;
import java.io.IOException;
public class ClientGUI extends JFrame {
private JSplitPane bigSplitPane;
private JScrollPane showInfoPane;
private JPanel btnPanel;
private JComboBox cmbInsuranceType, cmbHouseType;
private JLabel lblInsureType;
private Dimension minimumSize;
private JTextArea txtForInfo;
public static final String SHOW = "Show Info";
public static final String EXIT = "Exit";
public static final String BODYINJURE = "Body Injur Liability";
public static final String COLLISION = "Collision Coverage";
public static final String PERSONINJURE = "Personal Injury Protection";
public static final String PROPERTY = "Property Damage Liability";
public static final String COMPREHENSIVE = "Comprehensive Coverage";
public static final String LuxuryCarInjur="LuxuryCarInjur";
public ClientGUI() {
super("Factory Method Pattern- Auto Insurance. ");
minimumSize = new Dimension(130, 100);
setUpChoicePanel();
setUpScrollPanes();
}
private void setUpChoicePanel() {
cmbInsuranceType = new JComboBox();
cmbInsuranceType.addItem(BODYINJURE);
cmbInsuranceType.addItem(COLLISION);
cmbInsuranceType.addItem(PERSONINJURE);
cmbInsuranceType.addItem(PROPERTY);
cmbInsuranceType.addItem(COMPREHENSIVE);
cmbInsuranceType.addItem(LuxuryCarInjur);
lblInsureType = new JLabel("Insurance Types");
//Create the open button
JButton openButton = new JButton(SHOW);
openButton.setMnemonic(KeyEvent.VK_S);
JButton exitButton = new JButton(EXIT);
exitButton.setMnemonic(KeyEvent.VK_X);
ButtonListener btnListener = new ButtonListener();
// add action Listener
openButton.addActionListener(btnListener);
exitButton.addActionListener(btnListener);
btnPanel = new JPanel();
//------------------------------------------------
GridBagLayout gridbag = new GridBagLayout();
btnPanel.setLayout(gridbag);
GridBagConstraints gbc = new GridBagConstraints();
btnPanel.add(lblInsureType);
btnPanel.add(cmbInsuranceType);
btnPanel.add(openButton);
btnPanel.add(exitButton);
gbc.insets.top = 5;
gbc.insets.bottom = 5;
gbc.insets.left = 5;
gbc.insets.right = 5;
gbc.gridx = 0;
gbc.gridy = 0;
gridbag.setConstraints(lblInsureType, gbc);
gbc.gridx = 1;
gbc.gridy = 0;
gridbag.setConstraints(cmbInsuranceType, gbc);
gbc.insets.left = 2;
gbc.insets.right = 2;
gbc.insets.top = 15;
gbc.gridx = 0;
gbc.gridy = 5;
gridbag.setConstraints(openButton, gbc);
gbc.anchor = GridBagConstraints.WEST;
gbc.gridx = 1;
gbc.gridy = 5;
gridbag.setConstraints(exitButton, gbc);
//-----------------------------------------------
}
private void setUpScrollPanes() {
Border raisedbevel = BorderFactory.createRaisedBevelBorder();
txtForInfo = new JTextArea("Auto insurance information will be shown here.", 20, 30);
txtForInfo.setFont(new Font("Helvetica", Font.BOLD, 15));
txtForInfo.setLineWrap(true);
txtForInfo.setBackground(Color.pink);
showInfoPane = new JScrollPane(txtForInfo);
bigSplitPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT, showInfoPane, btnPanel);
bigSplitPane.setDividerLocation(220);
getContentPane().add(bigSplitPane);
setSize(new Dimension(500, 300));
setVisible(true);
}
class ButtonListener implements ActionListener {
public void actionPerformed(ActionEvent ae) {
if (ae.getActionCommand().equals(EXIT)) {
System.exit(1);
}
if (ae.getActionCommand().equals(SHOW)) {
String type = (String) cmbInsuranceType.getSelectedItem();
PolicyProducer pp=null;
if (type.equals(BODYINJURE)) {
pp=new BodyPolicy();
}
else if (type.equals(COLLISION)) {
pp=new CollPolicy();
}
else if (type.equals(PERSONINJURE)) {
pp= new PersonPolicy();
}
else if (type.equals(PROPERTY)) {
pp = new PropPolicy();
}
else if (type.equals(COMPREHENSIVE)) {
pp= new ComPolicy();
}else if(type.equals(LuxuryCarInjur)){
pp =new LuxuryCarPolicy();
}
AutoInsurance ai = pp.getInsurObj();
String desc = ai.getInfo();
txtForInfo.setText(desc);
}
}
}
public static void main(String args[])
{
try {
UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
}
catch (Exception evt) {}
ClientGUI frame = new ClientGUI();
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
}
);
frame.setSize(500, 420);
frame.setVisible(true);
}
}