When does System getProperty java io tmpdir return c temp

Question

Just curious as to when System getProperty  java io tmpdir   returns  c  temp    According to the java io File Java Docs-      The default temporary-file directory is specified by the system property java io tmpdir  On UNIX systems the default value of this property is typically   tmp  or   var tmp   on Microsoft Windows systems it is typically  c  temp   A different value may be given to this system property when the Java virtual machine is invoked  but programmatic changes to this property are not guaranteed to have any effect upon the the temporary directory used by this method    But in my case-   System out println System getProperty  java io tmpdir       Always returns-  C  Users admin AppData Local Temp  i e   TEMP    In what conditions will it return  c  temp     EDITED  If I change  TEMP  to C  Temp then I will get C  Temp  right  But the documentation shows c  Temp instead of C  Temp

User · Accepted Answer

In MS Windows the temporary directory is set by the environment variable TEMP. In XP, the temporary directory was set per-user as Local Settings\Temp.

If you change your TEMP environment variable to C:\temp, then you get the same when you run :

System.out.println(System.getProperty("java.io.tmpdir"));

User · Answer

If you set  -Djava io tmpdir C  temp

User · Answer

On the one hand  when you call System getProperty  java io tmpdir   instruction  Java calls the Win32 API s function GetTempPath  According to the MSDN       The GetTempPath function checks for the existence of environment   variables in the following order and uses the first path found          The path specified by the TMP environment variable    The path specified by the TEMP environment variable    The path specified by the USERPROFILE environment variable    The Windows directory       On the other hand  please check the historical reasons on why TMP and TEMP coexist  It s really worth reading

User · Answer

Value of  TEMP  environment variable is often user-specific and Windows sets it up with regard to currently logged in user account  Some user accounts may have no user profile  for example when your process runs as a service on SYSTEM  LOCALSYSTEM or other built-in account  or is invoked by IIS application with AppPool identity with Create user profile option disabled  So even when you do not overwrite  TEMP  variable explicitly  Windows may use c  temp or even c  windows temp folders for  lets say  non-usual user accounts  And what s more important  process might have no access rights to this directory

[java] When does System.getProperty("java.io.tmpdir") return "c:\temp"

Examples related to java

Examples related to windows

Examples related to tempdir