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   源码介绍

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public class FlyWeightFactory {
private Map<String, FlyWeight> coffeePools = new HashMap<String, FlyWeight>();
private static FlyWeightFactory factory = new FlyWeightFactory();

public static FlyWeightFactory getInstance() {
return factory;
}

public FlyWeight getOrder(String coffeeName) {
FlyWeight order = null;
if (coffeePools.containsKey(coffeeName)) {
order = coffeePools.get(coffeeName);
} else {
order = new CoffeeOrder(coffeeName);
coffeePools.put(coffeeName, order);
}
return order;
}

public int getTotalObjects() {
return coffeePools.size();
}
}