JAva削除ファイルの作成

       
String dirname = "C:\\Users\\Administrator\\Desktop\\ceshi";
File f1 = new File(dirname);
  
f1.mkdirs();

書類の判断方法

if (f1.isDirectory()){
    System.out.println("  ："+dirname);

    String s[] = f1.list();
    for (int i = 0; i < s.length; i++) {
        File f = new File(dirname + "/" + s[i]);
        if (f.isDirectory()){
            System.out.println(s[i] + "     ");
        }else {
            System.out.println(s[i] + "     ");
        }
    }
}else {
    System.out.println(dirname + "      ");
}

ファイルの削除

private static void deleteFolder(File folder) {
    File[] files = folder.listFiles();
    if (files!=null){
        for (File f : files){
            if (f.isDirectory()){
                deleteFolder(f);
            }else {
                f.delete();
            }
        }
    }
    folder.delete();
}