printStackTrace to java.util.logging.Logger

Question

How do I print the entire stack trace using java.util.Logger? (without annoying Netbeans).

The question should've originally specified staying within Java SE. Omitting that requirment was an error on my part.

-do-compile:     [mkdir] Created dir: /home/thufir/NetBeansProjects/rainmaker/build/empty     [mkdir] Created dir: /home/thufir/NetBeansProjects/rainmaker/build/generated-sources/ap-source-output     [javac] Compiling 13 source files to /home/thufir/NetBeansProjects/rainmaker/build/classes     [javac] /home/thufir/NetBeansProjects/rainmaker/src/model/TelnetEventProcessor.java:44: error: 'void' type not allowed here     [javac]                 log.severe(npe.printStackTrace(System.out));     [javac]                                               ^     [javac] 1 error  BUILD FAILED 

code with the error:

package model;  import java.util.Observable; import java.util.logging.Logger; import java.util.regex.Matcher; import java.util.regex.Pattern;  public class TelnetEventProcessor extends Observable {      private static Logger log = Logger.getLogger(TelnetEventProcessor.class.getName());     private String string = null;      public TelnetEventProcessor() {     }      private void stripAnsiColors() {         Pattern regex = Pattern.compile("\\e\\[[0-9;]*m");         Matcher regexMatcher = regex.matcher(string);         string = regexMatcher.replaceAll(""); // *3 ??     }      public void parse(String string) {         this.string = string;         ifs();     }      //       [\w]+(?=\.)      private void ifs() {         log.fine("checking..");         if (string.contains("confusing the hell out of")) {             Pattern pattern = Pattern.compile("[\\w]+(?=\\.)");  //(\w+)\.             Matcher matcher = pattern.matcher(string);             String enemy = null;             GameData data = null;             while (matcher.find()) {                 enemy = matcher.group();             }             try {                 data = new GameData.Builder().enemy(enemy).build();                 log.fine("new data object\t\t" + data.getEnemy());                 setChanged();                 notifyObservers(data);             } catch (NullPointerException npe) {                 log.severe(npe.printStackTrace(System.out));             }          } else if (string.contains("Enter 3-letter city code:")) {             log.fine("found enter city code");         } else {         }     } } 

see also:

https://stackoverflow.com/a/7100975/262852

Answer 1

Why don't you put the exception in the logger?

You can use this method :

logger.log(Level level, String msg, Throwable thrown)  

Answer 2

The severe method is only used to log severe messages without associated throwable information. If you need to log throwable information then you should use the log method instead:

try {      data = new GameData.Builder().enemy(enemy).build();      log.fine("new data object\t\t" + data.getEnemy());      setChanged();      notifyObservers(data); } catch (NullPointerException npe) {      log.log(Level.SEVERE, npe.getMessage(), npe); }