The Printstacktrace () output of exception in Java is converted to a string

usually Printstacktrace () can provide more information, we usually need its information to debug the program, but sometimes it is not convenient to direct output, we prefer to save the error information to the log, so we need to put the. pringstacktrance () content programming string, How do you do that?

It's actually very simple:

StringWriter SW = new StringWriter ();  
PrintWriter pw = new PrintWriter (SW);  
E.printstacktrace (PW);  
String msg=sw.tostring ();

So msg is the printed information.

So we can save the exception information to where we want it.