Closed. This question needs debugging details. It is not currently accepting answers. Edit the question to include desired behavior, a specific problem or error, and the shortest code necessary to reproduce the problem. This will help others answer the question. Closed 7 years ago. Improve this question I am using java.nio.file package and tried to create file with the following
Tag: file-io
Converting MultipartFile to java.io.File without copying to local machine
I have a Java Spring MVC web application. From client, through AngularJS, I am uploading a file and posting it to Controller as webservice. In my Controller, I am gettinfg it as MultipartFile and I can copy it to local machine. But I want to upload the file to Amazone S3 bucket. So I have to convert it to java.io.File.
java.io.FileNotFoundException: the system cannot find the file specified
I have a file named “word.txt”. It is in the same directory as my java file. But when I try to access it in the following code this file not found error occurs: Here’s my code: Answer Put the word.txt directly as a child of the project root folder and a peer of src Disclaimer: I’d like to explain why
Java read file and store text in an array
I know how to read a file with Java using Scanner and File IOException, but the only thing I don’t know is how to store the text in the files as an array. Here is a snippet of my code: Here is what my KeyWestTemp.txt file contains: Answer Stored as strings: For floats:
BufferInputStream vs ByteArrayInputStream
Here are three ways to read an entire file into memory before processing it: Approach A: Approach B: Approach C: Why would I prefer one approach over another? Are there any specific use-cases that call for one approach over another? Why not use a fixed-length byte[] instead? Answer Unless you need anything special in terms of capabilities (e.g. random access),
Changing the directory path’s forward slash to backslash
I’m using the JFile chooser, and trying to import a pdf file but; System.out.println(filelist); perfectly prints the desired outcome with forward slashes; C:/Users/raz/Documents/2pg.pdf but the doc gives an error with backslashes; java.io.FileNotFoundException: C:UsersrazDocuments2pg.pdf (The filename, directory name, or volume label syntax is incorrect) Answer It’s not the path separator that’s causing your problem, its the space at the front of
Unwanted double quotes in generated CSV file
I have created a CSV file using the Java code below: I am getting the CSV file, but the content of the file has unwanted double quotes. Eg. “ABC”,”123″,”KDNJ” I don’t get from where these double quotes are added. Answer This worked for me See the CSVWriter javadoc
How to recursively scan directories in Android
How can I recursively scan directories in Android and display file name(s)? I’m trying to scan, but it’s slow (force close or wait). I’m using the FileWalker class given in a separate answer to this question. Answer You should almost always access the file system only from a non-UI thread. Otherwise you risk blocking the UI thread for long periods
How to write an S3 object to a file?
What’s the fastest way to write an S3 object (of which I have the key) to a file? I’m using Java. Answer While IOUtils.copy() and IOUtils.copyLarge() are great, I would prefer the old school way of looping through the inputstream until the inputstream returns -1. Why? I used IOUtils.copy() before but there was a specific use case where if I
Most efficient way to check if a file is empty in Java on Windows
I am trying to check if a log file is empty (meaning no errors) or not, in Java, on Windows. I have tried using 2 methods so far. Method 1 (Failure) Method 2 (Failure) Now both these methods fail at times when the log file is empty (has no content), yet the file size is not zero (2 bytes). What