iterate static int values in java

Question

I have a simple question. Is there a way ( using reflections I suppose ) to iterate all the static values of a class?

For instance

class Any {
    static int one = 1;
    static int two = 2;
    static int three = 3;

    public static void main( String [] args ) {
          for( int i : magicMethod( Any.class ) ){
              System.out.println( i );
          }
    }
 }

Output

 1
 2
 3

Thanks.

Answer 1

import java.util.*;
import java.lang.reflect.*;

class Any {
    static int one = 1;
    static int two = 2;
    static int three = 3;

    public static void main( String [] args ) {
          for( int i : magicMethod( Any.class ) ){
              System.out.println( i );
          }
    }

    public static Integer[] magicMethod(Class<Any> c) {
        List<Integer> list  = new ArrayList<Integer>();
        Field[] fields = c.getDeclaredFields();
        for (Field field : fields) {
            try {
                if (field.getType().equals(int.class) && Modifier.isStatic(field.getModifiers())) {
                    list.add(field.getInt(null));
                }
            }
            catch (IllegalAccessException e) {
                // Handle exception here
            }
        }
        return list.toArray(new Integer[list.size()]);
    }
 }

Answer 2

Hey.. it was very easy. :P

      Field [] constants = Main.class.getFields();
      Object some = new Main();
      for( Field field : constants ){
          if(Modifier.isStatic(field.getModifiers() ) && 
             field.getType() == int.class  ) {
                    System.out.println( field.getInt( some  ) );
          }
      }

Answer 3

Your solution works for public fields but not private fields like you have in your example. If you want to be able to access the private fields of a class you need to use getDeclaredFields() instead of getFields().