Copying the content of a list into a folder

I have an arrayList "rules" containing Rules. Each Rule is an XML file and have some properties such as filename...

I want to copy the Rules from the arraylist to a folder named AllMRG. I tried the code between comments but I get the message "Source 'RG6.31.xml' does not exist".

I changed the code by the following, but there is still a problem with 'RG6.31.xml' and the folder AllMRG is empty even though the arrayList contains many Rules!

First attemption:

File AllMRGFolder = new File("AllMRG");
for(int p = 0; p < rules.size(); p++) {
	/* File MRGFile = new File(rules.get(p).fileName);	
	FileUtils.copyFileToDirectory(MRGFile, AllMRGFolder);  */
		
	File MRGFile = new File("AllMRG/" + rules.get(p).fileName); 
	if (!MRGFile.exists()) {
		FileUtils.copyFileToDirectory(MRGFile, AllMRGFolder);
	}
}

Second attemption:

String path = "AllMRG";
		for(Rule rule : rules) {
			File MRGFile = new File(rule.fileName);
		    Files.copy(MRGFile.toPath(), (new File(path + MRGFile.getName())).toPath(), StandardCopyOption.REPLACE_EXISTING);
		}

PS: Rule is a class

public class Rule implements Comparable{

    public String fileName;
    public String matches;
    public String TPinstances;
    public int nbrOfMatches;
    public double T;

    @Override
    public int compareTo(Object o) {
        if(o instanceof Rule){
            //processing to compare one Rule with another
        }
        return 0;
    }
}

Here is the entire code after having considered Shyam's answer. The same problem persists!

Path directoryPath = Files.createDirectory(Paths.get("AllMGR"));
		for(Rule rule : rules) {
			
			Path filePath = directoryPath.resolve(rule.fileName);
		    Files.createFile(filePath);
	 
		    File MRGFile = new File(rule.fileName);
		    String ruleContent = new String(Files.readAllBytes(Paths.get(MRGFile.getPath())));
		    String fileContent = new String(Files.readAllBytes(filePath));	
		    fileContent=ruleContent;
			PrintWriter out13= new PrintWriter("AllMGR/"+rule.fileName+".xml");
			out13.print(fileContent);
			out13.close();
} 

Firstly, you are creating a new File with rule.filename without giving any predefined path. Then, you are building a path like: path + MRGFile.getName() without any path delimiters and trying to copy the file to this location. I don't think this will work.

What can actually help you is, creating a base directory first and then creating individual files in it.

Create base directory:
Path directoryPath = Files.createDirectory(Paths.get("AllMGRDir"));

Then for each of your Rule object you can crate file using:

for(Rule rule : rules) {
      Path filePath = directoryPath.resolve(rule.fileName());
      Files.createFile(filePath);
// your remaining code
    }

The resolve(String other) method resolves the given path. Java doc says that:

> Converts a given path string to a Path and resolves it against this
> Path in exactly the manner specified by the resolve(Path) method.
> For example, suppose that the name separator is "/" and a path
> represents "foo/bar", then invoking this method with the path string
> "gus" will result in the Path "foo/bar/gus"

Hope this helps.