bufferedreader

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 4 years ago . I always get confused when to process my input data how, which process. Different times i find different solutions. I am also not clear about their Hierarchy. 回答1: InputStream is parent class of all input streams and readers. Classes that have Stream keyword will work with bytes

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 6 years ago . import java.util.ArrayList; import java.io.BufferedReader; import java.io.IOException; import java.io.FileReader; import java.util.ArrayList; import java.util.Random; public class WordList { private static Random r = new Random(); private static ArrayList<String> words = new ArrayList<String>();

问题 i was wondering, is there a way to read only parts of a String in a .txt file? Like for example, if "1,5,10,20" is in my .txt file, can i tell Java to save just "1" to a certain int, then save "5" to a different int, and so on? I hope i made it clear enough! Thanks guys! P.S i know how to read a whole line of text in a .txt file in Java using the BufferedReader, just not how to read only certain parts of it. 回答1: You can use Scanner class, which provides a Scanner#nextInt() method to read the

问题 This is the basis of my code. It prints students grades on the console, but how do I use a Buffereader to put all the students grade on a new file. import java.io.*; import java.util.InputMismatchException; import java.lang.*; import java.util.*; public class WorkSpace { private Scanner x; public void openFile(){ try{ x = new Scanner (new File ("grades.txt")); } catch(Exception e){ System.out.println("could not find file"); }} public void createFile()throws IOException { try{ File file = new

问题 How can i ignore the comment statements that begin with "/*" and ends with "*/" for example: /*the problem is..*/ or /* problem is very difficult */ ,,i want to remove these statement when i reading java file line by line public class filename1 { public static void main (String args[]) { try { fileName = "C:\\NetBeansProjects\\filename\\src\\filename\\filename.java"; FileReader fr = new FileReader(fileName); BufferedReader br = new BufferedReader(fr); line = br.readLine(); while (line !=null)

问题 I'm trying to execute API and try to get json response, but I'm getting error as "Disallowed Key Characters" for bf.readLine() . Following is the code that I'm trying to use. But when I run the request url in web browser I'm getting response without issue.But by using java code I'm unable to extract data. Please help String uri = "http://192.168.77.6/Ivr_ABN_API/?id?id=" + mobile; URL url; Gson json = null; try { url = new URL(uri); json = new Gson(); HttpURLConnection connection; access

问题 i got a java method which returns the response of the website in a string. Now i want to add the possibility to track the progress of this request. I know i can calculate it via (contenLength/readBytes) *100. But i am not sure how to retrieve this information properly and update the progress everytime it changes. My current method looks like this: public String executePost(URL url) { StringBuffer sb = new StringBuffer(); int readBytes = 0; int contentLength = 0; int progress = 0; try { String

问题 I am studying the BufferedReader,Scanner and InputStreamReader classes and their differences and i understand the purpose of each one. I want an explanation to clarify one thing : what is the purpose of passing the BufferedReader in the Scanner's constructor? What is the specific reason for doing that? Below is the example i am referring to. Scanner s = null; try { s = new Scanner(new BufferedReader(new FileReader("file...."))); //more code here......... 回答1: A BufferedReader will create a

问题 String time=Read_one_Line(); public static String Read_one_Line() throws FileNotFoundException, IOException { FileInputStream fin=new FileInputStream("sample.txt"); BufferedReader br=new BufferedReader(new InputStreamReader(fin)); str=br.readLine(); next_line=br.readLine(); return next_line; } Each time it should read one line from text file called "sample.txt" and return it . next time it should return next line and so on.... Contents of sample.txt are: Date:0 Year:0 Hour:0 Minute:0 Seconds

问题 Here I am trying to read a document that has words and corresponding abbreviations. E.g. one,1 two,2 easy,ez Each line is separated, and the words are separated from the abbreviations with a comma. When I want the buffered reader to keep reading lines using while ((line = br.readLine()) != null) it won't. It will only read the first line. This means it will display the abbreviation for one, which is 1. But if I input another value say two, I get this error message. Exception in thread "main"