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getProperty("java. io. tmpdir") to get the default temporary file location. For Windows, the default temporary folder is %USER%\AppData\Local\Temp. For Linux, the default temporary folder is /tmp.
getProperty("java. io. tmpdir"); Commonly, in Windows, the default temporary folder is C:\Temp , %Windows%\Temp , or a temporary directory per user in Local Settings\Temp (this location is usually controlled via the TEMP environment variable).
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".
The java. io. tmpdir system property indicates the temporary directory used by the Java Virtual Machine (JVM) to create and store temporary files. The default value is typically "/tmp" , or "/var/tmp" on Unix-like platforms.
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"));
If you set
-Djava.io.tmpdir=C:\temp
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.
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