Export Files to another folder/change extension using java

.java

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.RandomAccessFile;
import java.io.Writer;
import java.nio.channels.FileChannel;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.stream.Stream;

public class TransformFiles {
	
	public static void main(String[] args) throws IOException {
		
		final File folder= new File("C:\\Users\\User\\Downloads\\Compressed\\cars\\cars1");
		for (final File fileEntry : folder.listFiles()) {
	       
			 File destination = new File("C:\\Users\\User\\Downloads\\Compressed\\cars\\cars2\\"+fileEntry.getName().replaceAll(".bmp",".jpg"));


 		    copyFile(fileEntry,destination);  
	        
	    }
		
		        		  		
		 
	}
	
	 public static void copyFile(File sourceFile, File destFile) throws IOException {
	     if(!destFile.exists()) {
	      destFile.createNewFile();
	     }

	     FileChannel source = null;
	     FileChannel destination = null;
	     try {
	      source = new RandomAccessFile(sourceFile,"rw").getChannel();
	      destination = new RandomAccessFile(destFile,"rw").getChannel();

	      long position = 0;
	      long count    = source.size();

	      source.transferTo(position, count, destination);
	     }
	     finally {
	      if(source != null) {
	       source.close();
	      }
	      if(destination != null) {
	       destination.close();
	      }
	    }
	 }

}