BE THE CODER > Java > java.io package

The following example shows creating temp files in system temp directory as well as user configured directory. The deleteOnExit method is a convenient method to delete unwanted temporary files automatically when JVM exits.

File Name :	com/bethecoder/tutorials/io/TempFilesTest.java
Author :	Sudhakar KV
Email :	[email protected]


package com.bethecoder.tutorials.io;



import java.io.BufferedWriter;

import java.io.File;

import java.io.FileWriter;

import java.io.IOException;



public class TempFilesTest {



  /**

   * @param args

   */

  public static void main(String[] args) {

    try {

      //File.createTempFile("prefix", "suffix");

      //File.createTempFile("prefix", "suffix", directory);

      

      //prefix - The prefix string to be used in generating the file's name; 

      //      must be at least three characters long

      

      //suffix - The suffix string to be used in generating the file's name; may be null, 

      //      in which case the suffix ".tmp" will be used 



      //directory - The directory in which the file is to be created, or null 

      //      if the default temporary-file directory is to be used 



      

      File tmpfile = File.createTempFile("name", ".ext");

      tmpfile.deleteOnExit();

      System.out.println(tmpfile.getAbsolutePath());

      

      tmpfile = File.createTempFile("mytempfile", null);

      tmpfile.deleteOnExit();

      System.out.println(tmpfile.getAbsolutePath());

      

      //Creates a temp file in the given directory

      tmpfile = File.createTempFile("mytempfile", ".txt", new File("C:\\NEW"));

      tmpfile.deleteOnExit();

      System.out.println(tmpfile.getAbsolutePath());

      

      //Write to temp file

      BufferedWriter writer = new BufferedWriter(new FileWriter(tmpfile));

      writer.write("Hello World");

      writer.close();

      

    } catch (IOException e) {

      e.printStackTrace();

    }

  }



}

Temp Files