frontend.java

来自「程序设计模式java入门源码大全」· Java 代码 · 共 21 行

public class FrontEnd implements HelpInterface
{
  final int FRONT_END_HELP = 1;
  final int INTERMEDIATE_LAYER_HELP = 2;
  HelpInterface successor;

  public FrontEnd(HelpInterface s)
  {
    successor = s;
  }

  public void getHelp(int helpConstant)
  {
    if(helpConstant != FRONT_END_HELP){
      successor.getHelp(helpConstant);
    } else {
      System.out.println("This is the front end. Don't you like it?");
    }
  }
}