This is an application for testing online. The system’s login user names and the examination contents are come from a Java server. To land the system, first, you need to open the system. Then enter the user name - test and the password - test. If the user has exams, the system will obtain the contents for the examination. Then you can click on the "开始考试" button to begin the exam. You need to check the answers before you finish it. Because after you click the "提交" button at top right, you can’t change the answers anymore. In the query history, you can browse the finished exams. In the “考试统计”, you can check how many items you did wrong. Finally, you can click the “退出登录” to return to the login window.