Java Collection How to - Use EnumMap to store enum type data as key

Question

We would like to know how to use EnumMap to store enum type data as key.

Answer

/*w  ww .  ja v a 2  s  .  c  o m*/
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;

}

The code above generates the following result.