How to store printStackTrace into a string

Question

How can I get the e printStackTrace   and store it into a String variable  I want to use the string generated by e printStackTrace   later in my program   I m still new to Java so I m not too familiar with StringWriter that I think will be the solution  Or if you have any other ideas please let me know   Thanks

User · Answer

StackTraceElement   stack   new Exception   getStackTrace    String theTrace       for StackTraceElement line   stack       theTrace    line toString

User · Answer

Use the apache commons-lang3 lib  import org apache commons lang3 exception ExceptionUtils          String   ss   ExceptionUtils getRootCauseStackTrace e   logger error StringUtils join ss  System lineSeparator

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Guava makes this easy with Throwables getStackTraceAsString Throwable    Exception e       String stackTrace   Throwables getStackTraceAsString e     Internally  this does what  Zach L suggests

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Something along the lines of   StringWriter errors   new StringWriter    ex printStackTrace new PrintWriter errors    return errors toString      Ought to be what you need    Relevant documentation    StringWriter PrintWriter Throwable

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call   getStackTraceAsString sqlEx   public String getStackTraceAsString Exception exc        String stackTrace        Error in getStackTraceAsString      ByteArrayOutputStream baos   new ByteArrayOutputStream    PrintStream ps   new PrintStream  baos    exc printStackTrace ps   try       stackTrace   baos toString   UTF8        charsetName e g  ISO-8859-1        catch  UnsupportedEncodingException ex             Logger getLogger sss class getName    log Level SEVERE  null  ex         ps close    try       baos close           catch  IOException ex             Logger getLogger sss class getName    log Level SEVERE  null  ex         return stackTrace

User · Answer

You have to use getStackTrace    method instead of printStackTrace    Here is a good example   import java io           Simple utilities to return the stack trace of an   exception as a String     public final class StackTraceUtil      public static String getStackTrace Throwable aThrowable        final Writer result   new StringWriter        final PrintWriter printWriter   new PrintWriter result       aThrowable printStackTrace printWriter       return result toString                   Defines a custom format for the stack trace as String         public static String getCustomStackTrace Throwable aThrowable          add the class name and any message passed to constructor     final StringBuilder result   new StringBuilder   BOO-BOO           result append aThrowable toString         final String NEW LINE   System getProperty  line separator        result append NEW LINE          add each element of the stack trace     for  StackTraceElement element   aThrowable getStackTrace            result append  element          result append  NEW LINE              return result toString               Demonstrate output        public static void main  String    aArguments       final Throwable throwable   new IllegalArgumentException  Blah        System out println  getStackTrace throwable         System out println  getCustomStackTrace throwable

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Along the lines of Guava  Apache Commons Lang has ExceptionUtils getFullStackTrace in org apache commons lang exception  From a prior answer on StackOverflow

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You can use the ExceptionUtils getStackTrace Throwable t   from Apache Commons 3 class org apache commons lang3 exception ExceptionUtils    http   commons apache org proper commons-lang   ExceptionUtils getStackTrace Throwable t   Code example    try         your code here    catch Exception e      String s   ExceptionUtils getStackTrace e

[java] How to store printStackTrace into a string

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