file-io

问题 It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 6 years ago . for example i have the file named file.txt which contain personal information (id,name, salary): A123 Anna 3000 A234 Alex 4000 A986 Jame 5000 How can I write a java code that allow user to enter an ID of a person

问题 I'd like to read a binary file and use something like std::string that automatically resizes the buffer and such. I'm using Visual C++. What are my options? 回答1: std::string should be safe to do so... you only have to be careful using .c_str() method. Use .data() . 回答2: The std::string class already does handle data with embedded NUL characters. What problem are you encountering? Note that when using the .c_str() method, any embedded NUL character will terminate the returned C-style string.

问题 So I am trying to get a list of files in a directory with a file handle.list() method but it returns an empty list even though there are files in the directory. What seems strange to me is that it does work on the device but it does not work on the desktop. I think I know what the problem is but I dont know how to solve it though. In the method description it says "On the desktop, an FileType.Internal handle to a directory on the classpath will return a zero length array.", but there is no

问题 So I am trying to get a list of files in a directory with a file handle.list() method but it returns an empty list even though there are files in the directory. What seems strange to me is that it does work on the device but it does not work on the desktop. I think I know what the problem is but I dont know how to solve it though. In the method description it says "On the desktop, an FileType.Internal handle to a directory on the classpath will return a zero length array.", but there is no

问题 I'm beginner, and keep yourself in hands. I have some easy program, and I need do junit test for write method. I have some collection in input. How I can do this? This my code: // write to file public void write(String fileName, List<FigureGeneral> figuresList) { try { PrintWriter out = new PrintWriter( new File(fileName).getAbsoluteFile()); try { for (int i = 0; i < figuresList.size(); i++) { out.println(figuresList.get(i).toString()); } } finally { out.close(); } } catch (IOException e) {

问题 I am attempting to output an aligned protein sequence to a file, however, the output string is truncated each time I attempt to write the string to file. The string I'm attempting to write is 4603 characters long, and is printed to the console with the correct number of characters. The first snippet of code I'm attaching pertains to the output variable itself. I'm going to include the full strings here, because the way in which the strings are truncated upon writing to a file have been

问题 I am attempting to output an aligned protein sequence to a file, however, the output string is truncated each time I attempt to write the string to file. The string I'm attempting to write is 4603 characters long, and is printed to the console with the correct number of characters. The first snippet of code I'm attaching pertains to the output variable itself. I'm going to include the full strings here, because the way in which the strings are truncated upon writing to a file have been

问题 In C++ if I wish to read input till the EOF I can do it in the following manner while(scanf("%d",&n)) { A[i]=n; i++; } I can then run this code as ./a.out < input.txt. What is the java equivalent of this code? 回答1: You can do this: Scanner s = new Scanner(System.in); while (s.hasNextInt()) { A[i] = s.nextInt(); i++; } 回答2: // assuming that reader is an instance of java.io.BufferedReader String line = null; while ((line = reader.readLine()) != null) { // do something with every line, one at a

问题 I am creating a large text file, the first line is a summary which depends on the contents. I am currently inserting a summary line that contains what I expect the summary to be, and after creating the file I compare this with what was actually written. If the information is different I overwrite the initial summary. Code follows. std::ofstream ofile(filename); numOutSegInSynth-=computeSegmentsFromLevel(numLevelsInSynth-1,myInitCkt); //extra padding inserted, to prevent summary overwriting

问题 I am trying to run the following python server under windows: """ An echo server that uses select to handle multiple clients at a time. Entering any line of input at the terminal will exit the server. """ import select import socket import sys host = '' port = 50000 backlog = 5 size = 1024 server = socket.socket(socket.AF_INET, socket.SOCK_STREAM) server.bind((host,port)) server.listen(backlog) input = [server,sys.stdin] running = 1 while running: inputready,outputready,exceptready = select