OnJava8-Examples/exceptions/LoggingExceptions2.java

// exceptions/LoggingExceptions2.java
// (c)2016 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://mindviewinc.com/Books/OnJava/ for more book information.
// Logging caught exceptions.
// {ErrorOutputExpected}
import java.util.logging.*;
import java.io.*;

public class LoggingExceptions2 {
  private static Logger logger =
    Logger.getLogger("LoggingExceptions2");
  static void logException(Exception e) {
    StringWriter trace = new StringWriter();
    e.printStackTrace(new PrintWriter(trace));
    logger.severe(trace.toString());
  }
  public static void main(String[] args) {
    try {
      throw new NullPointerException();
    } catch(NullPointerException e) {
      logException(e);
    }
  }
}
/* Output:
___[ Error Output ]___
Dec 15, 2015 10:34:25 PM LoggingExceptions2 logException
SEVERE: java.lang.NullPointerException
        at
LoggingExceptions2.main(LoggingExceptions2.java:17)
___[ Error Output is Expected ]___
*/