Create a temporary file

Sometimes it come in handy to create a temporary file.
Here we create a temporary file with the prefix "temp_" as shown by the first parameter.
The second parameter is an optional suffix, if it\'s null as in the example, .tmp will be
used by default.
Optionally a third parameter can be defined pointing out the directory in which the file will
be created. If not specified (as below), the default temporary directory will be used.
　
　
import java.io.File;
import java.io.IOException;
public class FileUtil {
public void createTemporaryFile(String filename) {
try {
//Create the temp file
File f = File.createTempFile("temp_", null);
//Check where the default temp dir is located
System.out.println(f.getAbsolutePath());
//Delete the file when the program exists
f.deleteOnExit();
//Place any processing of the file here
// ...
}
catch (IOException ex) {
ex.printStackTrace();
}
}
public static void main(String[] args) {
FileUtil fileutil = new FileUtil();
fileutil.createTemporaryFile("myfile.txt");
}
}