How can I get the current stack trace in Java

Question

How do I get the current stack trace in Java  like how in  NET you can do Environment StackTrace   I found Thread dumpStack   but it is not what I want - I want to get the stack trace back  not print it out

User · Answer

Maybe you could try this   catch Exception e        StringWriter writer   new StringWriter        PrintWriter pw   new PrintWriter writer       e printStackTrace pw       String errorDetail   writer toString        The string  errorDetail  contains the stacktrace

User · Answer

StackTraceElement   stackTraceElements   Thread currentThread   getStackTrace         The last element of the array represents the bottom of the stack  which is the least recent method invocation in the sequence    A StackTraceElement has getClassName    getFileName    getLineNumber   and getMethodName      loop through StackTraceElement and get your desired result   for  StackTraceElement ste   stackTraceElements            do your stuff here

User · Answer

On android a far easier way is to use this   import android util Log  String stackTrace   Log getStackTraceString exception

User · Answer

I suggest that     Thread dumpStack     is an easier way and has the advantage of not actually constructing an exception or throwable when there may not be a problem at all  and is considerably more to the point

User · Answer

You can use Thread currentThread   getStackTrace     That returns an array of StackTraceElements that represent the current stack trace of a program

User · Answer

for  StackTraceElement ste   Thread currentThread   getStackTrace          System out println ste

User · Answer

I have a utility method that returns a string with the stacktrace   static String getStackTrace Throwable t        StringWriter sw   new StringWriter        PrintWriter pw   new PrintWriter sw  true       t printStackTrace pw       pw flush        sw flush        return sw toString        And just logit like          catch  FileNotFoundException e        logger config getStackTrace e

User · Answer

try     catch Exception e        StackTraceElement   traceElements   e getStackTrace                  or   Thread currentThread   getStackTrace

User · Answer

Thread currentThread   getStackTrace      is fine if you don t care what the first element of the stack is   new Throwable   getStackTrace      will have a defined position for your current method  if that matters

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Thread currentThread   getStackTrace      is available since JDK1 5   For an older version  you can redirect exception printStackTrace   to a StringWriter      StringWriter sw   new StringWriter    new Throwable     printStackTrace new PrintWriter sw    String stackTrace   sw toString

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Another solution  only 35 31 characters    new Exception   printStackTrace       new Error   printStackTrace

User · Answer

You can use jstack utility if you want to check the current call stack of your process   Usage      jstack  -l   lt pid gt           to connect to running process      jstack -F  -m   -l   lt pid gt           to connect to a hung process      jstack  -m   -l   lt executable gt   lt core gt           to connect to a core file      jstack  -m   -l   server id   lt remote server IP or hostname gt           to connect to a remote debug server   Options      -F  to force a thread dump  Use when jstack  lt pid gt  does not respond  process is hung      -m  to print both java and native frames  mixed mode      -l  long listing  Prints additional information about locks     -h or -help to print this help message

User · Answer

To string with guava    Throwables getStackTraceAsString new Throwable

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I used answers from above and added formatting  public final class DebugUtil        private static final String SEPARATOR     n        private DebugUtil                public static String formatStackTrace StackTraceElement   stackTrace            StringBuilder buffer   new StringBuilder            for  StackTraceElement element   stackTrace                buffer append element  append SEPARATOR                     return buffer toString               public static String formatCurrentStacktrace             StackTraceElement   stackTrace   Thread currentThread   getStackTrace            return formatStackTrace stackTrace

User · Answer

You can use Apache s commons for that   String fullStackTrace   org apache commons lang3 exception ExceptionUtils getStackTrace e

User · Answer

To get the stack trace of all threads you can either use the jstack utility  JConsole or send a kill -quit signal  on a Posix operating system    However  if you want to do this programmatically you could try using ThreadMXBean   ThreadMXBean bean   ManagementFactory getThreadMXBean    ThreadInfo   infos   bean dumpAllThreads true  true    for  ThreadInfo info   infos      StackTraceElement   elems   info getStackTrace         Print out elements  etc      As mentioned  if you only want the stack trace of the current thread it s a lot easier - Just use Thread currentThread   getStackTrace

User · Answer

For people  who just want to get the current stacktrace to their logs  I would go with  getLogger   debug  quot Message quot   new Throwable      Cheers

User · Answer

Tony  as a comment to the accepted answer  has given what seems to be the best answer which actually answers the OP s question   Arrays toString Thread currentThread   getStackTrace    replace         n           the OP did NOT ask how to get a String from the stack trace from an Exception   And although I m a huge fan of Apache Commons  when there is something as simple as the above there is no logical reason to use an outside library

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In Java 9 there is a new way   public static void showTrace        List lt StackFrame gt  frames       StackWalker getInstance  Option RETAIN CLASS REFERENCE                   walk  stream  - gt  stream collect  Collectors toList           for   StackFrame stackFrame   frames       System out println  stackFrame

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Getting stacktrace   StackTraceElement   ste   Thread currentThread   getStackTrace      Printing stacktrace  JAVA 8     Arrays asList ste  forEach System out  println     Printing stacktrage  JAVA 7    StringBuilder sb   new StringBuilder     for  StackTraceElement st   ste        sb append st toString     System lineSeparator       System out println sb

User · Answer

Silly me  it s Thread currentThread   getStackTrace

User · Answer

This is an old post  but here is my solution     Thread currentThread   dumpStack      More info and more methods there    http   javarevisited blogspot fr 2013 04 how-to-get-current-stack-trace-in-java-thread html

[stack-trace] How can I get the current stack trace in Java?

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