#Java - Code Snippets for '#File handling'

#Java - Code Snippets for '#File handling' - 11 code snippet(s) found

Sample 1. Method to get all files from a directory recursively

List<File> fileList = new ArrayList();



List<File> read(String dir) throws IOException{   

   File directory = new File(dir);

   File[] fList = directory.listFiles();

   for(File file:fList){

      if(file.isDirectory()){

         read(file.getPath());

      } else {

         fileList.add(file);

      }

   }

   return fileList;

}

_{Like Feedback file handling file isDirectory() .getPath() recursion java.io.File}

Sample 2. Load Properties using Property Class

private static Properties props = null;

   

private static void loadProperties(){

   try {

      if(props == null || props1 == null || props2 == null){

         props = new Properties();

         props.load(new FileInputStream(Constants.PROP_BASE_DIR + Constants.EMPLOYEE_REPORTING_PROP));

      } catch (FileNotFoundException e) {

         // TODO Auto-generated catch block

         e.printStackTrace();

      } catch (IOException e) {

         // TODO Auto-generated catch block

         e.printStackTrace();

      } 

       

   }

}

_{Like Feedback property class properties FileInputStream file handling}

Sample 3. Method to check if the the file exists and not a directory

public static boolean isOleFile(File file)

{

   if ((file == null) || (!file.exists()) || (file.isDirectory())) {

      return false;

   }

    

   return true;

}

_{Like Feedback file handling check if file exists File class check if file is a directory file.isDirectory file.exists}

Sample 4. Write a program that reads file using FileReader and BufferedReader

File file = new File("/home/sample.txt");

FileReader fileReader = new FileReader(file);

BufferedReader bufferedReader = new BufferedReader(fileReader);

while ((line = bufferedReader.readLine()) != null) {

   System.out.println(line);

}

_{Like Feedback File handling FileReader BufferedReader}

Sample 5. getting file path, absolute path and canonical path

public static void main(String[] args){

   String parent = null;

   File file = new File("/file.txt");

   System.out.println(file.getPath());

   System.out.println(file.getAbsolutePath());

   try {

      System.out.println(file.getCanonicalPath());

   } catch (IOException e) {

      e.printStackTrace();   

   }

}

_{Like Feedback file absolute path canonical path canonical file handling java.io.IOException}

Sample 6. Write to a file using File, FileOutputStream and ObjectOutputStream

class BuggyBread1{

   public static void main(String[] args){

      try {

         BuggyBread1 buggybread1 = new BuggyBread1();

         ObjectOutputStream objectOutputStream = new ObjectOutputStream(new FileOutputStream(new File("newFile.txt")));

         objectOutputStream.writeObject(buggybread1);

      } catch (Exception e) {

         e.printStackTrace();

      }

   }

}

_{Like Feedback File FileOutputStream ObjectOutputStream file handling}

Sample 7. Method to get specific format files from a directory

private Collection<File> getDocAndTextFiles() {

    File directory = new File("C:DocDir");

    if (directory.exists() && directory.isDirectory()) {

      Collection<File> files = FileUtils.listFiles(directory, new String[] { "doc","txt" }, false);

    }

    return files;

}

_{Like Feedback file handling file directory FileUtils.listFiles fileutils}

Sample 8. Create a new File

File file = new File("xyz.txt");

boolean status = file.createNewFile();

_{Like Feedback file file handling file.createnewfile}

Sample 9. Create a new Directory

File dir = new File("c:xyz");

boolean status = file.mkdir();

_{Like Feedback file handling creating new directory file.mkdir}

Sample 10. Usage of java.nio.channels.FileLock

File lockF = new File(root, STORAGE_FILE_LOCK);

lockF.deleteOnExit();

RandomAccessFile file = new RandomAccessFile(lockF, "rws");

FileLock res = null;

try {

   res = file.getChannel().tryLock();

} catch(OverlappingFileLockException oe) {



}

_{Like Feedback java.nio FileLock input output file handling}

Sample 11. Write a Program to read a file and then count number of words

public class CountwordsinFile {

   public static void main(String[] args) throws IOException{

      String line = null;

      

      File file = new File("C:Hello.txt");

      FileReader fileReader = new FileReader(file);

      

      BufferedReader bufferedReader = new BufferedReader(fileReader);

      

      int countWords = 0;

      

      do {

         

         line = bufferedReader.readLine();

         countWords += line.split(" ").length;

         

      } while(line != null);

   }

}

_{Like Feedback file handling count number of words code coding file handling}

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