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욱'S 노트
When Using It 알고리즘 구현 부분을 교체 하고 싶을때 Class Diagram Sample Code public interface Strategy { public void algorithmInterface(); } public class ConcreteStrategy implements Strategy { @Override public void algorithmInterface() { } } public class Context { private Strategy strategy; public Context(Strategy strategy) { this.strategy = strategy; } public void contextInteface() { strategy.algorithmInter..
When Using It 하위클래스에 구현을 위임하고 싶을때 Class Diagram Sample Code public abstract class AbstractClass { public abstract void templateMethod1(); public abstract void templateMethod2(); public abstract void templateMethod3(); public void execute() { templateMethod1(); templateMethod2(); templateMethod3(); } } public class ConcreteClass extends AbstractClass { @Override public void templateMethod1() {}..
When Using It Heavy한 Job이 수행되는 클래스들을 미리 만들어 놓고 공유하고 싶을때 Class Diagram Sample Code public interface Aggregate { } public interface Iterator { public Object next(); public boolean hasNext(); } public class ConcreteAggregate implements Aggregate { private Object[] items; public Iterator iterator() { return new ConcreteIterator(this); } public Object getItem(int index) { if ( index < items.length ..
When Using It Heavy한 Job이 수행되는 클래스들을 미리 만들어 놓고 공유하고 싶을때 Class Diagram Sample Code public interface Flyweight { public void Operation(); } public class ConcreteFlyweight implements Flyweight { @Override public void Operation() { System.out.println("A"); } } public class FlyweightFactory { Map pool = new HashMap(); public FlyweightFactory() { pool.put("A",new ConcreteFlyweight()); } public Flywe..
When Using It Lazy Init 등 실제 사용이나 필요로하는 시점에 작업을 수행한다. Class Diagram Sample Code public interface Subject { public void request(); } public class RealSubject implements Subject { @Override public void request() { System.out.println("실제수행"); } } public class Proxy implements Subject { private RealSubject realSubject; @Override public void request() { realSubject.request(); } } Caution 특별한 주의사항은 ..