Just to be clear, I’m not looking for the MIME type. Let’s say I have the following input: /path/to/file/foo.txt I’d like a way to break this input up, specifically into .txt for the extension. Is there any built in way to do this in Java? I would like to avoid writing my own parser. 32 … Read more
I’m using the subprocess module to start a subprocess and connect to its output stream (standard output). I want to be able to execute non-blocking reads on its standard output. Is there a way to make .readline non-blocking or to check if there is data on the stream before I invoke .readline? I’d like this … Read more
I am using Python 3.2.1 and I can’t import the StringIO module. I use io.StringIO and it works, but I can’t use it with numpy‘s genfromtxt like this: x=”1 3\n 4.5 8″ numpy.genfromtxt(io.StringIO(x)) I get the following error: TypeError: Can’t convert ‘bytes’ object to str implicitly and when I write import StringIO it says ImportError: … Read more
Possible Duplicate: How do I measure how long a function is running? I have an I/O time-taking method which copies data from a location to another. What’s the best and most real way of calculating the execution time? Thread? Timer? Stopwatch? Any other solution? I want the most exact one, and briefest as much as … Read more
What’s the best way to pipe the output from an java.io.OutputStream to a String in Java? Say I have the method: writeToStream(Object o, OutputStream out) Which writes certain data from the object to the given stream. However, I want to get this output into a String as easily as possible. I’m considering writing a class … Read more
I need to append text repeatedly to an existing file in Java. How do I do that? 3Best Answer 31
Want to improve this post? Provide detailed answers to this question, including citations and an explanation of why your answer is correct. s without enough detail may be edited or deleted. How to read all the files in a folder through Java? It doesn’t matter which API. 33 s 33
I am using the Scanner methods nextInt() and nextLine() for reading input. It looks like this: System.out.println(“Enter numerical value”); int option; option = input.nextInt(); // Read numerical value from input System.out.println(“Enter 1st string”); String string1 = input.nextLine(); // Read 1st string (this is skipped) System.out.println(“Enter 2nd string”); String string2 = input.nextLine(); // Read 2nd string … Read more
How can I check whether a file exists, before opening it for reading in Java (the equivalent of Perl’s -e $filename)? The only similar question on SO deals with writing the file and was thus answered using FileWriter which is obviously not applicable here. If possible I’d prefer a real API call returning true/false as … Read more
I need to read a large text file of around 5-6 GB line by line using Java. How can I do this quickly? 22 s 22 A common pattern is to use try (BufferedReader br = new BufferedReader(new FileReader(file))) { String line; while ((line = br.readLine()) != null) { // process the line. } } … Read more
