I was given an assignment to write all ordered contents of given files into a result.txt. At first, the filenames are split into different Arraylists where each file contains a label in a format #n/N where N is the total number of files. e.g. British explorer James Clark Ross led the first expedition to reach…
Tag: file
Sonar scan says Use try-with-resources or close this “Stream” in a “finally” clause
Sonar qube is giving me the following error: Use try-with-resources or close this “Stream” in a “finally” clause This is my code: How can I fix this error? Answer define and open your stream this way: Doing this, the system will automatically close the stream and you don’t need t…
Tinylog Android, is it possible to clear the file?
I’m using the Tinylog library with the “rolling file” function to write logs to a file. Sometimes I need to clear a file. Tried to do it with normal Java methods but it breaks the file and makes it hard to read. Is there a way to clear the log file at any point so it doesn’t break? Ans…
How to save Tempfile to External storage using ACTION_OPEN_DOCUMENT_TREE?
unable to save the zip file to external storage after picking a folder using ACTION_OPEN_DOCUMENT_TREE. I’m creating a project which creates and manipulate files and document, in that task I want to save that stuff in external storage but I can’t do that with android developer documentation, so pl…
Efficient way to get line number of bunch of string from a file
I want to search a list of strings from the file and get the line number. I am looking for an efficient way to do it. I don’t want to search one string at a time and open and close file. Answer Store the line numbers where each String appears in the file using a HashMap<String, List<Integer>>…
How can I output a random image when in a jar file?
The below code works when running from my editor but the image fails to load when compiled into a runnable jar file with eclipse. Could someone please suggest how I can modify my code or editor to load the files when compiled. I have read other methods of accessing files but since I need to select randomly fr…
Java – Method is not creating file text file
I got this method for creating a log file: but the file is not created, instead I get this error: Whats the fix for this? Answer Try putting the email.log directly as a child of the project root folder and a peer of src. project_root/src project_root/email.log (your file) This is probably happening because of…
Cannot be resolved to absolute file path because it does not reside in the file system
My Code: I have already tried instead of .getFile(), extractJarFileFromURL or resource.getInputStream() but all this does not work. When I package my project and run it as a jar file and it tries to open the following file it always returns the following message. Error: java.io.FileNotFoundException: class pa…
Creating a new File instance with a parent directory returns a File inside the root instead of the parent
I have this method to get the directory that my Java program is running inside. But when I create a new File instance with this directory as its parent, it returns a File inside the drive’s root. I was expecting the absolute path of this file to be D:usersSimonmyprogramtestfile, but instead its D:testfi…
Create directory without manage all files permission
How can i create directory in ( /storage/emulated/0/ ) without manage all files permission. This is my code : On android 11 its not working because it need manage all files permission. Answer From SDK 30 you can not access all file system without using MANAGE_EXTERNAL_STORAGE. If your app is in following cate…