提示当编译器找不到符号时，是什么原因？谢谢!

用java写的一个用来显示图片的类 希望大家能用得上 -with java write a picture to show the class hope that we can use the grain

/*_############################################################################ _## _## SNMP4J - ScopedPDU.java _## _## Copyright 2003-2007 Frank Fock and Jochen Katz (SNMP4J.org) _## _## Licensed under the Apache License, Version 2.0 (the "License") _## you may not use this file except in compliance with the License. _## You may obtain a copy of the License at _## _## http://www.apache.org/licenses/LICENSE-2.0 _## _## Unless required by applicable law or agreed to in writing, software _## distributed under the License is distributed on an "AS IS" BASIS, _## WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. _## See the License for the specific language governing permissions and _## limitations under the License. _## _##########################################################################*/-/*_############################################################################ _## _## SNMP4J- ScopedPD

java2 primer plus一书源程序，为了解java编程的读者设计了一套完整的教程。在本书中你将学会java编程的基础-java2 primer plus a source book to understand java programming readers design a complete handbook. In this book you will learn the basis of java programming

自己写的一个字符替换的Util，支持正则表达式！-himself wrote a character replacement Util support regular expression!

什么是J2EE？它和普通的Java有什么不同？都进行了描述-What is J2EE? It is an ordinary Java What is the difference? Have described

实现了一些基本的学生成绩管理系统的功能！希望对大家有所帮助！-achieve some basic student performance management system function! We want to help!

Matrix application for java

使用EJB 2.0 QL教程代码(CMP).-use EJB QL Directory 2.0 code (CMP).

java系统通用框架 很实用的东东 一般人都看的懂, -java系统通用框架

学习java的必备书，我看了以后进步很大，非常经典，推荐给大家。-An essential book to learn java, I have read since has made great progress in a very classic, recommended to everyone.