[DesignPattern - Template Method] sample1

Design Pattern - Adapter

1. 클래스다이어그램

2. Source

• AbstractDisplay.java
  

  package com.dazzilove.templatemethod.sample1;
  
  public abstract class AbstractDisplay {
      public abstract void open();
      
      public abstract void print();
      
      public abstract void close();
      
      public final void display() {
          open();
          for(int i=0; i<5; i++) {
              print();
          }
          close();
      }
  }

• CharDisplay.java
  

  package com.dazzilove.templatemethod.sample1;
  
  public class CharDisplay extends AbstractDisplay {
      
      private char ch;
      
      public CharDisplay(char ch) {
          this.ch = ch;
      }
  
      @Override
      public void open() {
          System.out.print("<<");
      }
  
      @Override
      public void print() {
          System.out.print(ch);
      }
  
      @Override
      public void close() {
          System.out.println(">>");
      }
  }

• StringDisplay.java
  

  package com.dazzilove.templatemethod.sample1;
  
  public class StringDisplay extends AbstractDisplay {
      
      private String string;
      private int width;
      
      public StringDisplay(String string) {
          this.string = string;
          this.width = string.getBytes().length;
      }
  
      @Override
      public void open() {
          printLine();
      }
  
      @Override
      public void print() {
          System.out.println("|" + string + "|");
      }
  
      @Override
      public void close() {
          printLine();
      }
  
      private void printLine() {
          StringBuilder printStr = new StringBuilder();
          printStr.append("+");
          for(int i=0; i            printStr.append("-");
          }
          printStr.append("+");
          
          System.out.println(printStr.toString());
      }
  }

• Main.java
  

  package com.dazzilove.templatemethod.sample1;
  
  public class Main {
      public static void main(String[] args) {
          AbstractDisplay abstractDisplay1 = new CharDisplay('H');
          AbstractDisplay abstractDisplay2 = new StringDisplay("Hellow, world.");
          AbstractDisplay abstractDisplay3 = new StringDisplay("안녕하세요");
          
          abstractDisplay1.display();
          abstractDisplay2.display();
          abstractDisplay3.display();
      }
  }

3. 결과화면