具有名称常量

/**
 from
* N o w J a v a . c o m - 时代Java 
**/

//package com.nowjava;


import java.lang.reflect.Field;

import java.lang.reflect.Modifier;


import java.util.ArrayList;

import java.util.List;


public class Main {

    public static boolean hasConstantWithName(final Class<?> clazz,

            final String fieldName) {

        for (final Field field : retrieveConstantFields(clazz)) {

            if (field.getName().equals(fieldName)) {

                return true;

            }//from N o w  J a v a  . c o m

        }

        return false;

    }


    public static List<Field> retrieveConstantFields(final Class<?> clazz) {

        final List<Field> fields = new ArrayList<Field>();

        for (final Field field : retrieveAllFields(clazz)) {

            if (!isFieldToBeProvided(field)) {

                fields.add(field);

            }

        }

        return fields;

    }


    public static List<Field> retrieveAllFields(final Class<?> clazz) {

        final List<Field> fields = new ArrayList<Field>();

        Class<?> currentClass = clazz;

        while (!Object.class.equals(currentClass)) {

            for (final Field field : currentClass.getDeclaredFields()) {

                fields.add(field);

            }

            currentClass = currentClass.getSuperclass();

        }

        return fields;

    }