As WMR mentioned, org.apache.commons.io.IOUtils from Apache has a method called copy(InputStream,OutputStream) which does exactly what you’re looking for. So, you have: InputStream in; OutputStream out; IOUtils.copy(in,out); in.close(); out.close(); …in your code. Is there a reason you’re avoiding IOUtils?
Using java.io.File: File f = new File(filePathString); if(f.exists() && !f.isDirectory()) { // do something }
Use sponge for this kind of tasks. Its part of moreutils. Try this command: grep -v ‘seg[0-9]\{1,\}\.[0-9]\{1\}’ file_name | sponge file_name
How to read all files in a folder from Java?
A CSV parser is now a part of .NET Framework. Add a reference to Microsoft.VisualBasic.dll (works fine in C#, don’t mind the name) using (TextFieldParser parser = new TextFieldParser(@”c:\temp\test.csv”)) { parser.TextFieldType = FieldType.Delimited; parser.SetDelimiters(“,”); while (!parser.EndOfData) { //Process row string[] fields = parser.ReadFields(); foreach (string field in fields) { //TODO: Process field } } } … Read more
One way to do it is: while read p; do echo “$p” done <peptides.txt As pointed out in the comments, this has the side effects of trimming leading whitespace, interpreting backslash sequences, and skipping the last line if it’s missing a terminating linefeed. If these are concerns, you can do: while IFS=”” read -r p … Read more
A common pattern is to use try (BufferedReader br = new BufferedReader(new FileReader(file))) { String line; while ((line = br.readLine()) != null) { // process the line. } } You can read the data faster if you assume there is no character encoding. e.g. ASCII-7 but it won’t make much difference. It is highly likely … Read more
fcntl, select, asyncproc won’t help in this case. A reliable way to read a stream without blocking regardless of operating system is to use Queue.get_nowait(): import sys from subprocess import PIPE, Popen from threading import Thread try: from queue import Queue, Empty except ImportError: from Queue import Queue, Empty # python 2.x ON_POSIX = ‘posix’ … Read more
Calling read() reads through the entire file and leaves the read cursor at the end of the file (with nothing more to read). If you are looking to read a certain number of lines at a time you could use readline(), readlines() or iterate through lines with for line in handle:. To answer your question … Read more
How do I create a Java string from the contents of a file?