用java语言实现通讯录，Java 字符界面通讯录，文件名 MyCommunication.java，主要实现的功能是添加信息，删除信息，查找信息，显示所有信息，删除所有信息！-Contacts with the java language, Java character interface contacts, the file name MyCommunication.java, the main function is to add information to achieve, delet