Java出现未报告的异常

Question

    public void createDirectory(String path) {
        try {
            shellSupport.executeCommand("hadoop fs -mkdir "+path);
            logger.info("Directory "+path+" created successfully");
        } catch(Exception exc) {
            throw exc;
        }
    }

Error

error: unreported exception Exception; must be caught or declared to be thrown

If I remove try catch then code compiles and logger shows the message but directory is not created.

Answer 1

Isn't it enough just to add:

public void createDirectory(String path) throws Exception {
    try {
        shellSupport.executeCommand("hadoop fs -mkdir "+path);
        logger.info("Directory "+path+" created successfully");
    } catch(Exception exc) {
        throw exc;
    }
}

That is: public void createDirectory(String path) throws Exception to your method?

Answer 2

If you want to throw a exception you have to declare it in your method signature. In your case that would be

public void createDirectory(String path) throws Exception

Or you could catch it without throwing

try {
    shellSupport.executeCommand("hadoop fs -mkdir "+path);
    logger.info("Directory "+path+" created successfully");
} catch(Exception exc) {
    exc.printStackTrace();
    // handle your exception
}