文章内容
1、IDelegate.java
package com.ntan520.delegate;
/**
* @author Nick Tan
*/public interface IDelegate {
void stop();
}
2、INotifier.java
package com.ntan520.delegate;
/**
* @author Nick Tan
*/public interface INotifier {
public void addDelegate(IDelegate delegate);
public void runNotify();
}
3、NotifierAbstract
package com.ntan520.delegate;
import java.util.ArrayList;
import java.util.List;
/**
* @author Nick Tan
*/public abstract class NotifierAbstract implements INotifier {
private List<IDelegate> delegates = new ArrayList<IDelegate>();
@Override
public void addDelegate(IDelegate delegate) {
if (delegate != null) {
delegates.add(delegate);
}
}
@Override
public void runNotify() {
for (IDelegate delegate : delegates) {
delegate.stop();
}
}
}
4、DefaultNotifier.java
package com.ntan520.delegate;
/**
* @author Nick Tan
*/public class DefaultNotifier extends NotifierAbstract {
}
5、测试
1）Delegator1.java
package com.ntan520.delegate;
public class Delegator1 implements IDelegate {
@Override
public void stop() {
System.out.println("委托1事件被执行");
}
}
2）Delegator2.java
package com.ntan520.delegate;
public class Delegator2 implements IDelegate {
@Override
public void stop() {
System.out.println("委托2事件被执行");
}
}
3）Main.java
package com.ntan520.delegate;
public class Main {
public static void main(String[] args) {
Delegator1 delegator1 = new Delegator1();
Delegator2 delegator2 = new Delegator2();
INotifier notifier = new DefaultNotifier();
notifier.addDelegate(delegator1);
notifier.addDelegate(delegator2);
notifier.runNotify();
}
}