java通讯录课程设计，序使用了ObjectInPutStream和ObjectOutPutStream这两个文件输入输出流，利用这两个文件输入输出流，可以方便的直接将通讯记录对象直接写入文件中，另外为了方便添加和删除一条记录还使用了系统的对象数组类Arraylist。同时也方便了查找操作

-java address book curriculum design, sequence using ObjectInPutStream and ObjectOutPutStream input and output streams of these two files, use of these two files input and output streams, you can easily record the object directly to the communications directly to write to a file, the other for the convenience of adding and removing a Records also uses the system' s object array class Arraylist. But also facilitates the search operation