Java递归遍历文件

public class ListFiles {
    public static void main(String[] args) {
        parseFiles(new File("C:/Users/82341/Desktop/Tools"),0);
    }

    public static void parseFiles(File f,int level) {
        if (f == null || !f.exists()) {
            return;
        }
        File[] files = f.listFiles();
        for (File file : files) {
            for (int i = 0; i < level; i++) {
                System.out.print("\t");
            }
            System.out.println(file.getName());
            if (file.isDirectory()) {
                parseFiles(file,level++);
            }
        }
    }
}