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Ques:- If i throw a custom ApplicationException from a business method in Entity bean which is participating in a transaction, would the transaction be rolled back by container. Does container rolls back transaction only in case of SystemExceptions?
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Ques:- If my session bean with single method insert record into 2 entity beans, how can I know that the process is done in same transaction (the attributes for these beans are Required)
Ques:- How do I create a database connection?
Right Answer:
To create a database connection in Java, you can use the following code snippet:

```java
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

public class DatabaseConnection {
public static void main(String[] args) {
String url = "jdbc:mysql://localhost:3306/yourDatabase";
String user = "yourUsername";
String password = "yourPassword";

try {
Connection connection = DriverManager.getConnection(url, user, password);
System.out.println("Connection established!");
// Use the connection here
} catch (SQLException e) {
e.printStackTrace();
}
}
}
```

Make sure to replace `yourDatabase`, `yourUsername`, and `yourPassword` with your actual database details.


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