Print the stack trace of an exception

Question

How do I print the stack trace of an exception to a stream other than stderr  One way I found is to use getStackTrace   and print the entire list to the stream

User · Answer

Not beautiful  but a solution nonetheless   StringWriter writer   new StringWriter    PrintWriter printWriter   new PrintWriter  writer    exception printStackTrace  printWriter    printWriter flush     String stackTrace   writer toString

User · Answer

I have created a method that helps with getting the stackTrace   private static String getStackTrace Exception ex        StringBuffer sb   new StringBuffer 500       StackTraceElement   st   ex getStackTrace        sb append ex getClass   getName            ex getMessage       n        for  int i   0  i  lt  st length  i            sb append   t at     st i  toString       n              return sb toString

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If you are interested in a more compact stack trace with more information  package detail  that looks like     java net SocketTimeoutException Receive timed out     at j n PlainDatagramSocketImpl receive0 Native Method  na 1 8 0 151      at j n AbstractPlainDatagramSocketImpl receive AbstractPlainDatagramSocketImpl java 143         at j n DatagramSocket receive DatagramSocket java 812         at o s n SntpClient requestTime SntpClient java 213  classes       at o s n SntpClient 1 call   145         at   call   134         at o s f SyncRetryExecutor call SyncRetryExecutor java 124         at o s f RetryPolicy call RetryPolicy java 105         at o s f SyncRetryExecutor call SyncRetryExecutor java 59         at o s n SntpClient requestTimeHA SntpClient java 134         at   requestTimeHA   122         at o s n SntpClientTest test2h SntpClientTest java 89  test-classes       at s r NativeMethodAccessorImpl invoke0 Native Method  na 1 8 0 151    you can try to use Throwables writeTo from the spf4j lib

User · Answer

The Throwable class provides two methods named printStackTrace  one that accepts a PrintWriter and one that takes in a PrintStream  that outputs the stack trace to the given stream   Consider using one of these

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Throwable printStackTrace     can take a PrintWriter or PrintStream argument     catch  Exception ex        ex printStackTrace new java io PrintStream yourOutputStream        That said  consider using a logger interface like SLF4J with an logging implementation like LOGBack or log4j

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See javadoc  out   some stream     try     catch   Exception cause           cause   printStrackTrace   new PrintStream   out

User · Answer

For the android dev minimalists  Log getStackTraceString exception

User · Answer

Apache commons provides utility to convert the stack trace from throwable to string    Usage   ExceptionUtils getStackTrace e    For complete documentation refer to https   commons apache org proper commons-lang javadocs api-release index html

User · Answer

There is an alternate form of Throwable printStackTrace   that takes a print stream as an argument  http   download oracle com javase 6 docs api java lang Throwable html printStackTrace java io PrintStream   E g   catch Exception e        e printStackTrace System out       This will print the stack trace to std out instead of std error

[java] Print the stack trace of an exception

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