Create a temporary file - A Java Code Example

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");
  }
}

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