package com.itranswarp.learnjava;

import java.io.File;
import java.io.IOException;

/**
 * Learn Java from https://www.liaoxuefeng.com/
 * 
 * @author liaoxuefeng
 */
public class Main {

	public static void main(String[] args) throws IOException {
		File currentDir = new File(".");
		listDir(currentDir.getCanonicalFile(), 0);
	}

	static void listDir(File dir, int depth) {
		// TODO: 递归打印所有文件和子文件夹的内容
		if (!dir.isFile() && !dir.isDirectory()) {
			return;
		}
		StringBuilder sb = buildBlank(depth);
		if (dir.isDirectory()) {
			System.out.println(sb.toString() + dir.getName() + '/');
			File[] fs = dir.listFiles();
			for (File f: fs) {
				listDir(f, depth + 1);
			}
		}
		if (dir.isFile()) {
			System.out.println(sb.toString() + dir.getName());
		}
		return;
	}
	
	static StringBuilder buildBlank(int depth) {
		StringBuilder sb = new StringBuilder();
		for(int i = 0; i < depth; i++) {
			sb.append(' ');
		}
		return sb;
	}
}