Java Data Type How to - Loop through "Color" enum and printing values. Different ways of doing it

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Question

We would like to know how to loop through "Color" enum and printing values. Different ways of doing it.

Answer

import java.awt.Color;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.util.HashMap;
/*from w  w  w  .j  a v  a  2  s . co  m*/
public class Main {
  public static void main(String[] args) throws IllegalAccessException {
    Class clazz = Color.class;
    Field[] colorFields = clazz.getDeclaredFields();

    HashMap<String, Color> singleColors = new HashMap<String, Color>();
    for (Field cf : colorFields) {
      int modifiers = cf.getModifiers();
      if (!Modifier.isPublic(modifiers))
        continue;

      Color c = (Color) cf.get(null);
      if (!singleColors.values().contains(c))
        singleColors.put(cf.getName(), c);
    }

    for (String k : singleColors.keySet()) {
      System.out.println(k + ": " + singleColors.get(k));
    }
  }
}

The code above generates the following result.

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