How do I log a stacktrace using java’s Logger class

I am using Java’s Logger class. I want to pass ex.printStackTrace() into Logger.log(loglevel, String), but printStackTrace() returns void. So I am not able to pass and print the stack trace of the exception.

Is there any way that I can convert void into String, or are there any other methods to print the whole stack trace of exceptions?

Answer

You need to understand that void is actually nothingness. You cannot convert what is nothing. You might end up printing void as a string, but (trust me), you don’t want that.

I think what you are looking for is

// assuming ex is your Exception object
logger.error(ex.getMessage(), ex);
// OR
Logger.log(errorLogLevel, ex.getMessage(), ex)

This will print the error message using the logger that you have configured. For more details, you can take a look at the java docs for Exception#getMessage()