The error you're encountering is due to the BusinessException not being handled in your Java code. To fix this, you need to either handle the BusinessException with a try-catch block or declare that your method throws this exception.

Here are the two possible solutions:

Solution 1: Handle with Try-Catch Block

Add a try-catch block around the code that throws the BusinessException.

javaCopy code
try {
    // Code that might throw BusinessException
    BookLendManager.loadReaderLendCount();
} catch (BusinessException e) {
    // Handle the exception
    e.printStackTrace();
}

Solution 2: Declare the Exception in Method Signature

Add throws BusinessException to the method signature where the exception can be thrown.

javaCopy code
public static void main(String[] args) throws BusinessException {
    BookLendManager.loadReaderLendCount();
}

Example with Try-Catch Block

Assuming loadReaderLendCount is the method causing the issue, you would modify your main method like this:

javaCopy code
public static void main(String[] args) {
    try {
        BookLendManager.loadReaderLendCount();
    } catch (BusinessException e) {
        e.printStackTrace();
    }
}

Example with Throws Declaration

Alternatively, you could modify the main method signature:

javaCopy code
public static void main(String[] args) throws BusinessException {
    BookLendManager.loadReaderLendCount();
}

Summary

You need to choose the approach based on your specific requirements. If the BusinessException is something that should be handled immediately within the method, use the try-catch block. If the method is part of a larger application where the exception should be propagated to a higher level, use the throws declaration.

Would you like more details on handling exceptions or have any other questions? Here are five questions you might want to ask:

1. How can I create custom exceptions in Java?
2. What are the best practices for exception handling in Java?
3. How do checked and unchecked exceptions differ in Java?
4. How can I log exceptions in Java applications?
5. What are the different types of exceptions in Java?

Tip: Always ensure that your exception handling is meaningful and provides enough information to understand the error and take corrective actions.