笑也有泪的专栏

在linux安装好java之后，测试发现java.lang.ClassFormatError  unrecognized class file version错误 找了好久，发现是版本号不对，接下来进行修改 首先说说我的安装路径 \usr\jdk1.6.0_07 修改一下bin 如下：  cd /usr/bin/ ln -s -f /usr/jdk1.6.0

今天学习Adapter模式，An adapter helps two incompatible interfaces to work together. This is the real world definition for an adapter. Adapter design pattern is used when you want two different classes with