Create a temporary fileTag(s): IO
import java.io.File; ... File temp = File.createTempFile("real",".howto"); temp.deleteOnExit();
(Javadoc) The prefix argument must be at least three characters long. It is recommended that the prefix be a short, meaningful string such as "hjb" or "mail". The suffix argument may be null, in which case the suffix ".tmp" will be used. To create the new file, the prefix and the suffix may first be adjusted to fit the limitations of the underlying platform.
If the prefix is too long then it will be truncated, but its first three characters will always be preserved. If the suffix is too long then it too will be truncated, but if it begins with a period character ('.') then the period and the first three characters following it will always be preserved.
Once these adjustments have been made the name of the new file will be generated by concatenating the prefix, five or more internally-generated characters, and the suffix.
The location of the directory used to hold temporary files is defined by the property java.io.tmpdir. The default value can be changed with the command line used to launch the JVM :
java -Djava.io.tmpdir=C:\mydir myClass
On some plateform, the temporary directory returned by java.io.tmpdir do not include a trailing slash. That is,
Win NT --> C:\TEMP\ Win XP --> C:\TEMP Solaris --> /var/tmp/ Linux --> /var/tmp
String tempdir = System.getProperty("java.io.tmpdir"); if ( !(tempdir.endsWith("/") || tempdir.endsWith("\\")) ) tempdir = tempdir + System.getProperty("file.separator");