Get folder size

Question

Do you know how can I get the folder size in Java?

The length() method in the File class only works for files, using that method I always get a size of 0.

Answer 1

Go through a folder, file by file, getting the size of each file and adding them to the variable size.

static int size=0;

 public static int folderSize(File folder){

    size = 0;

    File[] fileList = folder.listFiles();

    for(File file : fileList){
        if(!file.isFile()){ 
            folderSize(file);
        }
        size += file.length();
    }
    return size;
}