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>

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