package com.bj.observer;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;
class WakenUpEvent {
private long time;
private String loc;
private Child source;
public WakenUpEvent(long time, String loc, Child source) {
this.time = time;
this.loc = loc;
this.source = source;
}
public String getLoc() {
return loc;
}
public void setLoc(String loc) {
this.loc = loc;
}
public Child getSource() {
return source;
}
public void setSource(Child source) {
this.source = source;
}
public long getTime() {
return time;
}
public void setTime(long time) {
this.time = time;
}
}
class Child implements Runnable {
private List<WakenUpListener> wakenUpListeners = new ArrayList<WakenUpListener>();
public void addWakenUpListener(WakenUpListener l) {
wakenUpListeners.add(l);
}
public void wakeUp() {
for (int i = 0; i < wakenUpListeners.size(); i++) {
WakenUpListener l = wakenUpListeners.get(i);
l.ActionToWakenUp(new WakenUpEvent(System.currentTimeMillis(),
"bed", this));//多态 父类WakenUpListener 指向子类对象 Dad GrandFather
}
}
public void run() {
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}
this.wakeUp();
}
}
class Dad implements WakenUpListener {
public void ActionToWakenUp(WakenUpEvent wakenUpEvent) {
System.out.println("feed child");
}
}
class GrandFather implements WakenUpListener {
public void ActionToWakenUp(WakenUpEvent wakenUpEvent) {
System.out.println("hug child");
}
}
class Dog implements WakenUpListener {
public void ActionToWakenUp(WakenUpEvent wakenUpEvent) {
System.out.println("wang wang....");
}
}
interface WakenUpListener {
public void ActionToWakenUp(WakenUpEvent wakenUpEvent);
}
public class Test {
public static void main(String[] args) {
Child c = new Child();
String[] observers = PropertyMgr.getProperty("observers").split(",");
for (String s : observers) {
try {
c.addWakenUpListener((WakenUpListener) (Class.forName(s)
.newInstance()));
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
}
new Thread(c).start();
}
}
class PropertyMgr {//单例 缓存
private static Properties props = new Properties();
//load到内存后 静态初始化只执行一遍
static {
try {
props.load(Test.class.getClassLoader().getResourceAsStream(
"observer.properties"));
} catch (IOException e) {
e.printStackTrace();
}
}
public static String getProperty(String key) {
return props.getProperty(key);
}
class CryEvent {
}
abstract class Event {
}
}
OOAD.rar_设计模式 例
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2022-09-20
16:17:40
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收藏 14KB RAR 举报
OOAD.rar （27个子文件） 
OOAD bin 
observer.properties 77B com bj observer Test.class 1KB WakenUpEvent.class 1KB Dad.class 634B Child.class 1KB WakenUpListener.class 178B awt Test.class 720B ActionListener.class 184B TestFrame$1.class 729B MyActionListener2.class 673B Button.class 1KB ActionEvent.class 608B TestFrame$MyActionListener.class 1018B TestFrame.class 1KB MyActionListener.class 670B TestFrame$MyActionListener2.class 1023B Dog.class 637B PropertyMgr$CryEvent.class 475B PropertyMgr$Event.class 466B PropertyMgr.class 1KB GrandFather.class 649B src observer.properties 77B com bj observer awt TestFrame.java 1KB Test.java 1KB Test.java 3KB .project 380B .classpath 232B资源评论
