装饰模式

/**
*
* @author： muyichun
* @date  : 2016年3月23日08:59:05
* @function: 装饰模式
*/
public class Main{

public static void main(String[] args) {
Sourceable source = new Source();
Sourceable obj = new Decorator(source);
obj.method();

}
}

interface Sourceable{
public void method();
}
class Source implements Sourceable{

@Override
public void method() {
System.out.println("the original method!");
}
}
class Decorator implements Sourceable{
private Sourceable source;

public Decorator(Sourceable source){
super();
this.source = source;
}
@Override
public void method() {
System.out.println("before decorator!");
source.method();
System.out.println("after decorator!");
}

}