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Creating a temporary file

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In this section, you will learn how to create the temporary file in java.

Java Temporary File - Temporary File Creation in Java

     

In this program we are going to make a temporary file, which will be deleted automatically by the garbage collector when the program ends.

In this program we are using following methods:

createTempFile(String prefix, String suffix): This is a static method of file class. This creates an empty file and we have used two parameters to generate name.

write(): It will write in String.

close(): When we don't need to write further, we should close the program with() that will close the string.

deleteOnExit(): It will delete the existing file when you close the java program or your JVM.

Code of this program is given below:

import java.io.*;

public class CreateTemporaryFile{
  CreateTemporaryFile(){
  }
  public static void CreateTempFile(){
  try{
  // Create a temporary file object
  File tempFile = File.createTempFile("prefix""suffix");
  System.out.println("\nTemporary file file has 

been created : " + tempFile + "\n");
  // Write to temporary file
  BufferedWriter out = new BufferedWriter(new 

FileWriter(tempFile));
  out.write("You are writing on temporary file 

which will delete on exit : " + tempFile);
  out.close();
 // Delete temp file when program exits
  tempFile.deleteOnExit();
  
  catch (IOException e){
  System.out.println("Exception is" + e);
  }
  }
  public static void main(String[] args){
  CreateTempFile();
  }

}

The output of this program is given below:

C:\ CreateTemporaryFile>java CreateTemporaryFile

Temporary file file has been created : C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\prefix3
2276suffix


C:\tapan>

Download this example

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Posted on: June 7, 2007

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