question: public static Field findField ( Class < ? > type , String name ) throws NoSuchFieldException { if ( name == null ) { throw new IllegalArgumentException ( "Field name is not set" ) ; } Field field = type . getField ( name ) ; if ( ! Modifier . isPublic ( field . getModifiers ( ) ) ) { throw new NoSuchFieldException ( "Field '" + name + "' is not public" ) ; } type = field . getDeclaringClass ( ) ; if ( ! Modifier . isPublic ( type . getModifiers ( ) ) || ! isPackageAccessible ( type ) ) { throw new NoSuchFieldException ( "Field '" + name + "' is not accessible" ) ; } return field ; }
target:  Finds public field (static or non-static) that is declared in public class.