Java by API/java.util/EnumMap

EnumMap: get(Object key)

 
import java.util.EnumMap;
public class Main {
  public static void main(String[] args) {
    EnumMap<Size, String> sizeMap = new EnumMap<Size, String>(Size.class);
    sizeMap.put(Size.S, "S");
    sizeMap.put(Size.M, "M");
    sizeMap.put(Size.L, "L");
    sizeMap.put(Size.XL, "XL");
    sizeMap.put(Size.XXL, "XXL");
    sizeMap.put(Size.XXXL, "XXXL");
    for (Size size : Size.values()) {
      System.out.println(size + ":" + sizeMap.get(size));
    }
  }
}
enum Size {
  S, M, L, XL, XXL, XXXL;
}

EnumMap: put(T key, R value)

 
import java.util.EnumMap;
public class Main {
  public static void main(String[] args) {
    EnumMap<Size, String> sizeMap = new EnumMap<Size, String>(Size.class);
    sizeMap.put(Size.S, "S");
    sizeMap.put(Size.M, "M");
    sizeMap.put(Size.L, "L");
    sizeMap.put(Size.XL, "XL");
    sizeMap.put(Size.XXL, "XXL");
    sizeMap.put(Size.XXXL, "XXXL");
    for (Size size : Size.values()) {
      System.out.println(size + ":" + sizeMap.get(size));
    }
  }
}
enum Size {
  S, M, L, XL, XXL, XXXL;
}

new EnumMap(Class keyType)

 
import java.util.EnumMap;
public class Main {
  public static void main(String[] args) {
    EnumMap<Size, String> sizeMap = new EnumMap<Size, String>(Size.class);
    sizeMap.put(Size.S, "S");
    sizeMap.put(Size.M, "M");
    sizeMap.put(Size.L, "L");
    sizeMap.put(Size.XL, "XL");
    sizeMap.put(Size.XXL, "XXL");
    sizeMap.put(Size.XXXL, "XXXL");
    for (Size size : Size.values()) {
      System.out.println(size + ":" + sizeMap.get(size));
    }
  }
}
enum Size {
  S, M, L, XL, XXL, XXXL;
}