JAVA implements recursive and non recursive calls to of that traverse all files in the folder

JAVA traverses all files in the folder (recursive and non-recursive)

1. Do not use recursive method calls.

public void traverseFolder1(String path) {
    int fileNum = 0, folderNum = 0;
    File file = new File(path);
    if (file.exists()) {
      LinkedList<File> list = new LinkedList<File>();
      File[] files = file.listFiles();
      for (File file2 : files) {
        if (file2.isDirectory()) {
          System.out.println(" folder :" + file2.getAbsolutePath());
          list.add(file2);
          fileNum++;
        } else {
          System.out.println(" file :" + file2.getAbsolutePath());
          folderNum++;
        }
      }
      File temp_file;
      while (!list.isEmpty()) {
        temp_file = list.removeFirst();
        files = temp_file.listFiles();
        for (File file2 : files) {
          if (file2.isDirectory()) {
            System.out.println(" folder :" + file2.getAbsolutePath());
            list.add(file2);
            fileNum++;
          } else {
            System.out.println(" file :" + file2.getAbsolutePath());
            folderNum++;
          }
        }
      }
    } else {
      System.out.println(" File does not exist !");
    }
    System.out.println(" Shared folders :" + folderNum + ", The file has :" + fileNum);

  }

2. Use recursive method calls.

public void traverseFolder2(String path) {

    File file = new File(path);
    if (file.exists()) {
      File[] files = file.listFiles();
      if (files.length == 0) {
        System.out.println(" The folder is empty !");
        return;
      } else {
        for (File file2 : files) {
          if (file2.isDirectory()) {
            System.out.println(" folder :" + file2.getAbsolutePath());
            traverseFolder2(file2.getAbsolutePath());
          } else {
            System.out.println(" file :" + file2.getAbsolutePath());
          }
        }
      }
    } else {
      System.out.println(" File does not exist !");
    }
  }

3,

public static List<File> getFileList(String strPath) {
    File dir = new File(strPath);
    File[] files = dir.listFiles(); //  The files in the file directory are all put into an array 
    if (files != null) {
      for (int i = 0; i < files.length; i++) {
        String fileName = files[i].getName();
        if (files[i].isDirectory()) { //  Determine whether it is a file or a folder 
          getFileList(files[i].getAbsolutePath()); //  Gets the absolute path to the file 
        } else if (fileName.endsWith("avi")) { //  Determine if the file name is valid .avi At the end 
          String strFileName = files[i].getAbsolutePath();
          System.out.println("---" + strFileName);
          filelist.add(files[i]);
        } else {
          continue;
        }
      }

    }
    return filelist;
  }