How to detect if a file(with any extension) exist in java

Question

I am searching for a sound file in a folder and want to know if the sound file exist may it be .mp3,.mp4,etc.I just want to make sure that the filename(without extension) exists. eg.File searching /home/user/desktop/sound/a return found if any of a.mp3 or a.mp4 or a.txt etc. exist. I tried this: ``` File f=new File(fileLocationWithExtension); if(f.exist()) return true; else return false; ``` But here I have to pass the extension also otherwise its returning false always To anyone who come here,this is the best way I figured out ``` public static void main(String[] args) { File directory=new File(your directory location);//here /home/user/desktop/sound/ final String name=yourFileName; //here a; String[] myFiles = directory.list(new FilenameFilter() { public boolean accept(File directory, String fileName) { if(fileName.lastIndexOf(".")==-1) return false; if((fileName.substring(0, fileName.lastIndexOf("."))).equals(name)) return true; else return false; } }); if(myFiles.length()>0) Syste…

Accepted Answer

This code will do the trick..

```
public static void listFiles() {

File f = new File("C:/"); // use here your file directory path
        String[] allFiles = f.list(new MyFilter ());
        for (String filez:allFiles ) {
            System.out.println(filez);
        }
    }
}
        class MyFilter implements FilenameFilter {
        @Override
        //return true if find a file named "a",change this name according to your file name
        public boolean accept(final File dir, final String name) {
            return ((name.startsWith("a") && name.endsWith(".jpg"))|(name.startsWith("a") && name.endsWith(".txt"))|(name.startsWith("a") && name.endsWith(".mp3")|(name.startsWith("a") && name.endsWith(".mp4"))));

}
    }
```

Above code will find list of files which has name a. I used 4 extensions here to test(.jpg,.mp3,.mp4,.txt).If you need more just add them in `boolean accept()` method.

EDIT : Here is the most simplified version of what OP wants.

```
public static void filelist()
    {
        File folder = new File("C:/");
        File[] listOfFiles = folder.listFiles();

for (File file : listOfFiles)
    {
        if (file.isFile())
        {
            String[] filename = file.getName().split("\.(?=[^\.]+$)"); //split filename from it's extension
            if(filename[0].equalsIgnoreCase("a")) //matching defined filename
                System.out.println("File exist: "+filename[0]+"."+filename[1]); // match occures.Apply any condition what you need
        }
     }
}
```

Output:

```
File exist: a.jpg   //These files are in my C drive
File exist: a.png
File exist: a.rtf
File exist: a.txt
File exist: a.mp3
File exist: a.mp4
```

This code checks all the files of a path.It will split all filenames from their extensions.And last of all when a match occurs with defined filename then it will print that filename.

How to detect if a file(with any extension) exist in java

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