The method show(Banner) is undefined for the type BannerService
时间: 2024-02-29 08:53:47 浏览: 27
这个错误通常表示在 BannerService 类中调用了一个未定义的方法 show(Banner)。您需要检查 BannerService 类中是否存在名为 show(Banner) 的方法,或者检查该方法的参数列表和方法调用的参数是否匹配。如果问题仍然存在,请提供更多上下文或代码以获取更详细的帮助。
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The method Statement() is undefined for the type Connection
The error message "The method Statement() is undefined for the type Connection" typically occurs when you try to call the `Statement()` method on a `Connection` object in Java, but the method is not defined for that class.
To fix this error, you need to create a `Statement` object separately using the `createStatement()` method of the `Connection` object. Here is an example:
```
Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/mydatabase", "username", "password");
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ResultSet rs = stmt.executeQuery("SELECT * FROM mytable");
```
In this example, the `getConnection()` method is used to establish a connection to the MySQL database. Then, the `createStatement()` method is called on the `conn` object to create a `Statement` object, which is used to execute a query on the database.
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```
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