Mysql database Exception

Question

Exception in thread \"main\" java.lang.Error: Unresolved compilation problem: Type mismatch: cannot convert from java.sql.Statement to com.mysql.jdbc.Statement<

Answer 1

Wrong classes

import com.mysql.jdbc.Connection;
import com.mysql.jdbc.Statement;

should be

import java.sql.Connection;
import java.sql.Statement;

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In fact, java decouples everything from a specific database engine. One never should need an import of MySQL (or ProgressSQL or ...) classes.

To have those classes available at run-time, the first thing after the try, before getting the connection would be:

Class.forName("com.mysql.jdbc.Driver");

This technique would allow reading all strings from a configuration file, and writing database independent code.

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Missing: conn = ...

conn = DriverManager.getConnection(CONN_STR, userName, userpwd);