策略模式示例

javax.swing.JComponent

 java.awt.LayoutManager

 

涉及3個角色

 

策略架構：

public class Context {
 private Strategy strategy;
 /**
  * 策略方法
  */
 public void contextStrategy () {
  strategy.strategyInterface();
 }
}

//策略接口

public interface Strategy {

 public void strategyInterface();
 
}

//策略實現

public class ConcreteStrategyA implements Strategy {
 /**
  * 策略方法
  */
 public void strategyInterface() {
  System.out.println("ConcreteStrategyA ...");
 }

}