Recursive removing of directories

Question

I am trying to remove a directory recursively. But I've got some problems. So, I create in my "test" folder some directories as it shown on the picture. But in in 3rd folder it throws an exception java.lang.NullPointerException.

Here's the picture and some code:

public static void RecursiveRm (String myFile)
{
    File fl = new File(myFile);
    String [] temp = fl.list();
    if(temp.length > 0){
        for (int i = 0; i < temp.length; ++i){
            myFile = myFile + "/" + temp[i];
            RecursiveRm(myFile);
        }
    }
    else
        fl.delete();
}

That's how it works

Answer 1

You shouldn't be doing this for a start.

myFile = myFile + "/" + temp[i];

This means that if you have a directory with a b and c in it the path will become /a/b/c You should avoid changing myFile

Try this instead.

for(String file: new File(myFile).list()) {
    recursiveRm(myFile + "/" + file);
}
fl.delete();

Most likely you are getting a NullPointerException as File.list() return null if the directory doesn't exist.