Java - Search for files in a directory

Question

This is supposed to be simple, but I can\'t get it - \"Write a program that searches for a particular file name in a given directory.\" I\'ve found a few examples of a hardc

Answer 1

If you want to use a dynamic filename filter you can implement FilenameFilter and pass in the constructor the dynamic name.

Of course this implies taht you must instantiate every time the class (overhead), but it works

Example:

public class DynamicFileNameFilter implements FilenameFilter {

    private String comparingname;

    public DynamicFileNameFilter(String comparingName){
        this.comparingname = comparingName;
    }

    @Override
    public boolean accept(File dir, String name) {
        File file = new File(name);

        if (name.equals(comparingname) && !file.isDirectory())
            return false;

        else
            return true;
    }

}

then you use where you need:

FilenameFilter fileNameFilter = new DynamicFileNameFilter("thedynamicNameorpatternYouAreSearchinfor");
File[] matchingFiles = dir.listFiles(fileNameFilter);