Check if a field is "public static final" constant in Java

/*from   www .j  a  v a2s .c o m*/
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;

public class Main {
  public static void main(String[] argv) {
    Class cls = java.lang.String.class;
    Method method = cls.getMethods()[0];
    Field field = cls.getFields()[0];

    System.out.println(isPublicStaticFinal(field));
  }

  public static boolean isPublicStaticFinal(Field field) {
    int modifiers = field.getModifiers();
    return (Modifier.isPublic(modifiers) && Modifier.isStatic(modifiers) && Modifier
        .isFinal(modifiers));
  }
}