java - 加载 J 连接器时出现问题

Question

当我编译使用 java/java 应用程序开发的项目时出现错误

C:\Users\Mn_myles\Documents\NetBeansProjects\CACADEMY\src\cacademy\FormLogin.java:248: cannot find symbol
symbol  : method forName(java.lang.String)
location: class cacademy.Class
                                  Class.forName("com.mysql.jdbc.Driver");
                                       ^
C:\Users\Mn_myles\Documents\NetBeansProjects\CACADEMY\src\cacademy\change_password.java:48: cannot find symbol
symbol  : method forName(java.lang.String)
location: class cacademy.Class
                                        Class.forName("com.mysql.jdbc.Driver");
                                             ^
C:\Users\Mn_myles\Documents\NetBeansProjects\CACADEMY\src\cacademy\change_password.java:89: cannot find symbol
symbol  : method forName(java.lang.String)
location: class cacademy.Class
                                        Class.forName("com.mysql.jdbc.Driver");
                                             ^
C:\Users\Mn_myles\Documents\NetBeansProjects\CACADEMY\src\cacademy\change_password.java:408: cannot find symbol
symbol  : method forName(java.lang.String)
location: class cacademy.Class
                Class.forName("com.mysql.jdbc.Driver");
C:\Users\Mn_myles\Documents\NetBeansProjects\CACADEMY\src\cacademy\database.java:21: cannot find symbol
symbol  : method forName(java.lang.String)
location: class cacademy.Class
            Class.forName("com.mysql.jdbc.Driver");
C:\Users\Mn_myles\Documents\NetBeansProjects\CACADEMY\src\cacademy\frmAdd_Edit_Enrollmentfee.java:214: cannot find symbol
symbol  : variable Category
location: class cacademy.frmAdd_Edit_Enrollmentfee
        Category=fee_year.getSelectedItem().toString();

Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
6 errors

Answer 1

对于前 5 个错误，看起来您的代码中某处可能有一个名为 Class 的类或变量覆盖了 java.lang.Class，这就是你想要的。尝试将它们更改为 java.lang.Class.forName("..."); 并看看会得到什么。

如果没有更多信息，第六个错误将由您自己承担。你没有给我们任何背景信息。您是否在任何地方都有名为 Category 的实际变量，或者您是否缺少某些内容？