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package Flyweight;
public abstract class Flyweight
...
{
¡¡public abstract void operation();
}//end abstract class Flyweight
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package Flyweight;
public class ConcreteFlyweight extends Flyweight
...
{
¡¡private String string;
¡¡public ConcreteFlyweight(String str)
¡¡...
¡¡{
string = str;
¡¡}//end ConcreteFlyweight(...)
¡¡public void operation()
¡¡...
¡¡{
System.out.println("Concrete---Flyweight : " + string);
¡¡}//end operation()
}//end class ConcreteFlyweight
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package Flyweight;
import java.util.Hashtable;
public class FlyweightFactory
...
{
¡¡private Hashtable flyweights = new Hashtable();//----------------------------1
¡¡public FlyweightFactory() ...{}
¡¡public Flyweight getFlyWeight(Object obj)
¡¡...
¡¡{
Flyweight flyweight = (Flyweight) flyweights.get(obj);//----------------2
if(flyweight == null) ...{//---------------------------------------------------3
¡¡//²úÉúеÄConcreteFlyweight
¡¡flyweight = new ConcreteFlyweight((String)obj);
¡¡flyweights.put(obj, flyweight);//--------------------------------------5
}
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