Field modifiers: isSynthetic, isEnumConstant

 
import static java.lang.System.out;

import java.lang.reflect.Field;
import java.lang.reflect.Modifier;

enum Spy {
  BLACK, WHITE
}

public class FieldModifierSpy {
  volatile int share;
  int instance;

  class Inner {
  }

  public static void main(String... args) {
    try {
      Class<?> c = Class.forName(args[0]);
      int searchMods = 0x0;
      for (int i = 1; i < args.length; i++) {
        searchMods |= modifierFromString(args[i]);
      }

      Field[] flds = c.getDeclaredFields();
      out.format("Fields in Class '%s' containing modifiers:  %s%n", c
          .getName(), Modifier.toString(searchMods));
      boolean found = false;
      for (Field f : flds) {
        int foundMods = f.getModifiers();
        // Require all of the requested modifiers to be present
        if ((foundMods & searchMods) == searchMods) {
          out.format("%-8s [ synthetic=%-5b enum_constant=%-5b ]%n", f
              .getName(), f.isSynthetic(), f.isEnumConstant());
          found = true;
        }
      }

      if (!found) {
        out.format("No matching fields%n");
      }

      // production code should handle this exception more gracefully
    } catch (ClassNotFoundException x) {
      x.printStackTrace();
    }
  }

  private static int modifierFromString(String s) {
    int m = 0x0;
    if ("public".equals(s))
      m |= Modifier.PUBLIC;
    else if ("protected".equals(s))
      m |= Modifier.PROTECTED;
    else if ("private".equals(s))
      m |= Modifier.PRIVATE;
    else if ("static".equals(s))
      m |= Modifier.STATIC;
    else if ("final".equals(s))
      m |= Modifier.FINAL;
    else if ("transient".equals(s))
      m |= Modifier.TRANSIENT;
    else if ("volatile".equals(s))
      m |= Modifier.VOLATILE;
    return m;
  }
}