Working with Temporary files

import java.io.*;

//Work with temporary files in Java.

    public class TempFiles {
         public static void main(String[] argv) throws IOException {
        
         // 1. Make an existing file temporary
        
         // Construct a File object for the backup created by editing
         // this source file. The file probably already exists.
         // My editor creates backups by putting ' at the end of the name.
         File bkup = new File("Rename.java'");
         // Arrange to have it deleted when the program ends.
         bkup.deleteOnExit();
        
         // 2. Create a new temporary file.
        
         // Make a file object for foo.tmp, in the default temp directory
         File tmp = File.createTempFile("foo", "tmp");
         // Report on the filename that it made up for us.
         System.out.println("Your temp file is " + tmp.getCanonicalPath());
         // Arrange for it to be deleted at exit.
         tmp.deleteOnExit();
         // Now do something with the temporary file, without having to
         // worry about deleting it later.
         writeDataInTemp(tmp.getCanonicalPath());
     }
    
         public static void writeDataInTemp(String tempnam) {
         // This version is dummy. Use your imagination.
     }
}