java 编程思想 22.11: java bean 案例代码
thinking in java 4免费下载:http://download.csdn.net/detail/liangrui1988/7580155
package org.rui.swing.bean;
import java.awt.Color;
import java.awt.event.ActionListener;
import java.awt.event.KeyListener;
import org.rui.classts.Pet;
/**
* 简单的bean
* @author lenovo
*
*/
public class Frog {
private int jumps;
private Color color;
private Pet pet;
private boolean jmpr;
public int getJumps() {
return jumps;
}
public void setJumps(int jumps) {
this.jumps = jumps;
}
public Color getColor() {
return color;
}
public void setColor(Color color) {
this.color = color;
}
public Pet getPet() {
return pet;
}
public void setPet(Pet pet) {
this.pet = pet;
}
public boolean isJmpr() {
return jmpr;
}
public void setJmpr(boolean jmpr) {
this.jmpr = jmpr;
}
public void addActionListener(ActionListener l){
//.....
}
public void removeActionListener(ActionListener l){
//.....
}
public void addKeyListener(KeyListener l){
//.....
}
public void removeKeyListener(KeyListener l){
//.....
}
//an ordinary public method
public void croak(){
System.out.println("Ribbet!");
}
}
package org.rui.swing.bean;
import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.beans.BeanInfo;
import java.beans.EventSetDescriptor;
import java.beans.IntrospectionException;
import java.beans.Introspector;
import java.beans.MethodDescriptor;
import java.beans.PropertyDescriptor;
import java.lang.reflect.Method;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import org.rui.swing.SwingConsole;
/**
* 使用introspector抽取BeanInfo
* @author lenovo
*
*/
public class BeanDumper extends JFrame {
private JTextField query = new JTextField(20);
private JTextArea results = new JTextArea();
public void print(String s) {
results.append(s + " \n");
}
public void dump(Class<?> bean) {
results.setText("");
BeanInfo bi = null;
try {
bi = Introspector.getBeanInfo(bean, Object.class);
} catch (IntrospectionException e) {
System.out.println("Couldn 't introspect" + bean.getName());
return;
}
// 获取 bean属性 方法
for (PropertyDescriptor d : bi.getPropertyDescriptors()) {
Class<?> p = d.getPropertyType();
if (p == null)
continue;
System.out.println("Property type:\n" + p.getName());
Method m = d.getReadMethod();
if (m != null)
System.out.println("read method:+\n" + m.getName());
Method rm = d.getWriteMethod();
if (rm != null)
System.out.println("write method:+\n" + rm.getName());
System.out.println("====================================");
}
System.out.println("public methods:");
for (MethodDescriptor ms : bi.getMethodDescriptors()) {
System.out.println("ms:" + ms.getMethod().toString());
}
System.out.println("====================================");
System.out.println("envent support:");
for (EventSetDescriptor e : bi.getEventSetDescriptors()) {
System.out.println("listener type:\n"
+ e.getListenerType().getName());
for (Method lm : e.getListenerMethods())
System.out.println("listener method:\n" + lm.getName());
for (MethodDescriptor lmd : e.getListenerMethodDescriptors())
System.out.println("listener methodDescriptor:\n"
+ lmd.getName());
//
Method addListener = e.getAddListenerMethod();
System.out.println("add listener method:\n" + addListener);
Method removeListener = e.getRemoveListenerMethod();
System.out.println("Remove Listener Method:\n" + removeListener);
System.out.println("===========================================");
}
}
// ------------------------------------------------
class Dumper implements ActionListener {
@Override
public void actionPerformed(ActionEvent e) {
String name = query.getText();
System.out.println("name=========>"+name);
Class<?> c = null;
try {
c = Class.forName(name);
} catch (ClassNotFoundException e1) {
results.setText("couldn 't find " + name);
e1.printStackTrace();
return;
}
dump(c);
}
}
public BeanDumper() {
JPanel p = new JPanel();
p.setLayout(new FlowLayout());
p.add(new JLabel("qualifeied bean name:"));
p.add(query);
add(BorderLayout.NORTH, p);
add(new JScrollPane(results));
Dumper dmpr = new Dumper();
query.addActionListener(dmpr);
query.setText("org.rui.swing.bean.Frog");
dmpr.actionPerformed(new ActionEvent(dmpr, 0, ""));
}
public static void main(String[] args) {
//工具类
SwingConsole.run(new BeanDumper(), 600, 500);
}
}
/**outputt:
name=========>org.rui.swing.bean.Frog
Property type:
java.awt.Color
read method:+
getColor
write method:+
setColor
====================================
Property type:
boolean
read method:+
isJmpr
write method:+
setJmpr
====================================
Property type:
int
read method:+
getJumps
write method:+
setJumps
====================================
Property type:
org.rui.classts.Pet
read method:+
getPet
write method:+
setPet
====================================
public methods:
ms:public void org.rui.swing.bean.Frog.croak()
ms:public void org.rui.swing.bean.Frog.removeActionListener(java.awt.event.ActionListener)
ms:public void org.rui.swing.bean.Frog.setColor(java.awt.Color)
ms:public int org.rui.swing.bean.Frog.getJumps()
ms:public void org.rui.swing.bean.Frog.addKeyListener(java.awt.event.KeyListener)
ms:public void org.rui.swing.bean.Frog.setJmpr(boolean)
ms:public void org.rui.swing.bean.Frog.setPet(org.rui.classts.Pet)
ms:public void org.rui.swing.bean.Frog.addActionListener(java.awt.event.ActionListener)
ms:public java.awt.Color org.rui.swing.bean.Frog.getColor()
ms:public boolean org.rui.swing.bean.Frog.isJmpr()
ms:public org.rui.classts.Pet org.rui.swing.bean.Frog.getPet()
ms:public void org.rui.swing.bean.Frog.removeKeyListener(java.awt.event.KeyListener)
ms:public void org.rui.swing.bean.Frog.setJumps(int)
====================================
envent support:
listener type:
java.awt.event.ActionListener
listener method:
actionPerformed
listener methodDescriptor:
actionPerformed
add listener method:
public void org.rui.swing.bean.Frog.addActionListener(java.awt.event.ActionListener)
Remove Listener Method:
public void org.rui.swing.bean.Frog.removeActionListener(java.awt.event.ActionListener)
===========================================
listener type:
java.awt.event.KeyListener
listener method:
keyPressed
listener method:
keyReleased
listener method:
keyTyped
listener methodDescriptor:
keyPressed
listener methodDescriptor:
keyReleased
listener methodDescriptor:
keyTyped
add listener method:
public void org.rui.swing.bean.Frog.addKeyListener(java.awt.event.KeyListener)
Remove Listener Method:
public void org.rui.swing.bean.Frog.removeKeyListener(java.awt.event.KeyListener)
===========================================
*/
package org.rui.swing.bean;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionAdapter;
import java.io.Serializable;
import java.util.TooManyListenersException;
import javax.swing.JPanel;
/**
* 一个复杂的bean
*
* @author lenovo
*
*/
public class BangBean extends JPanel implements Serializable {
private int xm, ym;
private int cSize = 20;
private String text = "Bang!";
private int fontSize = 48;
private Color tColor = Color.RED;
private ActionListener actionListener;
public BangBean() {
addMouseListener(new ML());
addMouseMotionListener(new MML());
}
public int getcSize() {
return cSize;
}
public void setcSize(int cSize) {
this.cSize = cSize;
}
public String getText() {
return text;
}
public void setText(String text) {
this.text = text;
}
public int getFontSize() {
return fontSize;
}
public void setFontSize(int fontSize) {
this.fontSize = fontSize;
}
public Color gettColor() {
return tColor;
}
public void settColor(Color tColor) {
this.tColor = tColor;
}
// =========================
public void paintComponent(Graphics g) {
super.paintComponent(g);
g.setColor(Color.BLACK);
g.drawOval(xm - cSize / 2, ym - cSize / 2, cSize, cSize);
}
// 这是这是一个单播侦听器
// 最简单形式的侦听器管理
public void addActionListener(ActionListener l)
throws TooManyListenersException {
if (actionListener != null) {
throw new TooManyListenersException();
}
actionListener = l;
}
public void removeActionListener(ActionListener l) {
actionListener = null;
}
// ///
class ML extends MouseAdapter {
public void mousePressed(MouseEvent e) {
Graphics g = getGraphics();
g.setFont(new Font("TimesRoman", Font.BOLD, fontSize));
int width=g.getFontMetrics().stringWidth(text);
g.drawString(text, (getSize().width - width) / 2,
getSize().height / 2);
g.dispose();
// call the lisener 's method
if (actionListener != null) {
actionListener.actionPerformed(new ActionEvent(BangBean.this,
ActionEvent.ACTION_PERFORMED, null));
}
}
}
//////////////////
class MML extends MouseMotionAdapter{
public void mouseMoved(MouseEvent e){
xm=e.getX();
ym=e.getY();
repaint();
}
}
public Dimension getPreferredSize(){
return new Dimension(200,200);
}
}
package org.rui.swing.bean;
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.TooManyListenersException;
import javax.swing.JFrame;
import javax.swing.JTextField;
import org.rui.swing.SwingConsole;
public class BangBeanTest extends JFrame {
private JTextField txt = new JTextField(20);
// druing testing,report actions:
class BBL implements ActionListener {
private int count = 0;
@Override
public void actionPerformed(ActionEvent e) {
txt.setText("BangBean action " + count++);
}
}
//
public BangBeanTest(){
BangBean bb=new BangBean();
try {
bb.addActionListener(new BBL());
} catch (TooManyListenersException e) {
txt.setText("Too many listeners");
}
System.out.println("txt:"+txt.getText());
add(bb);
add(BorderLayout.SOUTH,txt);
}
public static void main(String[] args){
SwingConsole.run(new BangBeanTest(), 400, 500);
}
}
package org.rui.swing.bean;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionAdapter;
import java.io.Serializable;
import java.util.ArrayList;
import javax.swing.JFrame;
import javax.swing.JPanel;
import org.rui.swing.SwingConsole;
import org.rui.swing.bean.BangBean.ML;
import org.rui.swing.bean.BangBean.MML;
/**
* java Bean 与同步
*
* @author lenovo
*
*/
public class BangBean2 extends JPanel implements Serializable {
private int xm, ym;
private int cSize = 20;
private String text = "Bang2";
private int fontSize = 48;
private Color tColor = Color.BLACK;
private ArrayList<ActionListener> actionListeners = new ArrayList<ActionListener>();
public BangBean2() {
addMouseListener(new ML());
addMouseMotionListener(new MM());
}
public synchronized int getCircleSize() {
return cSize;
}
public synchronized void setCircleSize(int cSize) {
this.cSize = cSize;
}
public synchronized String getText() {
return text;
}
public synchronized void setText(String text) {
this.text = text;
}
public synchronized int getFontSize() {
return fontSize;
}
public synchronized void setFontSize(int fontSize) {
this.fontSize = fontSize;
}
public synchronized Color gettColor() {
return tColor;
}
public synchronized void settColor(Color tColor) {
this.tColor = tColor;
}
// /---------------------------------
public void paintComponent(Graphics g) {
super.paintComponent(g);
g.setColor(Color.black);
g.drawOval(xm - cSize / 2, ym - cSize / 2, cSize, cSize);
}
public synchronized void addActionListener(ActionListener l) {
actionListeners.add(l);
}
public synchronized void removeActionListener(ActionListener l){
actionListeners.remove(l);
}
public void notifyListener(){
ActionEvent a=new ActionEvent(BangBean2.this,ActionEvent.ACTION_PERFORMED,null);
ArrayList<ActionListener> lv=null;
//make a shallow copy of the list in case
//someone adds a listener while we're
//calling listeners
synchronized(this){
lv=new ArrayList<ActionListener>(actionListeners);
}
//call all the listener methods:
for(ActionListener al: lv)
al.actionPerformed(a);
}
class ML extends MouseAdapter{
public void mousePressed(MouseEvent e){
Graphics g=getGraphics();
g.setColor(tColor);
g.setFont(new Font("TimesRoman",Font.BOLD,fontSize));
int width=g.getFontMetrics().stringWidth(text);
g.drawString(text, (getSize().width-width)/2, getSize().height/2);
g.dispose();
notifyListener();
}
}
class MM extends MouseMotionAdapter{
public void mouseMoved(MouseEvent e){
xm=e.getX();
ym=e.getY();
repaint();
}
}
public static void main(String[] args) {
BangBean2 bb2=new BangBean2();
bb2.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e) {
System.out.println("ActionEvent action:"+e);
}
});
bb2.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e) {
System.out.println("BangBean2 action:");
}
});
bb2.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e) {
System.out.println("More action:");
}
});
JFrame frame=new JFrame();
frame.add(bb2);
SwingConsole.run(frame, 300, 300);
}
}
时间： 2024-07-30 08:37:37