bufferedreader

问题 I am programming using Java. I am trying write code which can recognize if the user presses the enter key in a console based program. How can I do this using java. I have been told that this can be done using either Scanner or, buffered input reader. I do not understand(or know how to use) buffered input reader. I tried to do do this using scanner but after pressing enter twice the program terminates, and it doesn\'t work Scanner readinput = new Scanner(System.in); String enterkey = \"Hola\";

问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: Read/write .txt file with special characters Im reading a file but I dont know how to read the accents and special caracters, here is mo code for read I read I have to add a different codification but i dont know how to doit File file = new File(\"C://fichero.csv\"); BufferedReader bufRdr = new BufferedReader(new FileReader(file)); String line = null; line = bufRdr.readLine(); Thanks 回答1: Try with the following:

问题 So I\'m having an issue reading a text file into my program. Here is the code: try{ InputStream fis=new FileInputStream(targetsFile); BufferedReader br=new BufferedReader(new InputStreamReader(fis)); //while(br.readLine()!=null){ for(int i=0;i<100;i++){ String[] words=br.readLine().split(\" \"); int targetX=Integer.parseInt(words[0]); int targetY=Integer.parseInt(words[1]); int targetW=Integer.parseInt(words[2]); int targetH=Integer.parseInt(words[3]); int targetHits=Integer.parseInt(words[4]

问题 I would like to know the specific difference between BufferedReader and FileReader . I do know that BufferedReader is much more efficient as opposed to FileReader , but can someone please explain why (specifically and in detail)? Thanks. 回答1: In simple manner: A FileReader class is a general tool to read in characters from a File. The BufferedReader class can wrap around Readers, like FileReader, to buffer the input and improve efficiency. So you wouldn't use one over the other, but both at

问题 I am making an HTTP get request to a website for an android application I am making. I am using a DefaultHttpClient and using HttpGet to issue the request. I get the entity response and from this obtain an InputStream object for getting the html of the page. I then cycle through the reply doing as follows: BufferedReader r = new BufferedReader(new InputStreamReader(inputStream)); String x = \"\"; x = r.readLine(); String total = \"\"; while(x!= null){ total += x; x = r.readLine(); } However

问题 I have to open a .exe file from my Java program. So I tried following code First. Process process = runtime.exec(\"c:\\\\program files\\\\test\\\\test.exe\"); But I was getting some error. Then I found out that the exe has to be launched from that location that is c://program files/test/ only then it will open with out errors. So I decided to write a .bat file and execute so that it will cd to that location and execute the .exe file. Following is my code: BufferedWriter fileOut; String

问题 I\'m reading a local file using a BufferedReader wrapped around a FileReader: BufferedReader reader = new BufferedReader(new FileReader(fileName)); // read the file // (error handling snipped) reader.close(); Do I need to close() the FileReader as well, or will the wrapper handle that? I\'ve seen code where people do something like this: FileReader fReader = new FileReader(fileName); BufferedReader bReader = new BufferedReader(fReader); // read the file // (error handling snipped) bReader

问题 As far I know, the two most common methods of reading character-based data from a file in Java is using Scanner or BufferedReader . I also know that the BufferedReader read files efficiently by using a buffer to avoid physical disk operations. My questions are: Does Scanner performs as well as BufferedReader ? Why would you choose Scanner over BufferedReader or vice versa? 回答1: Scanner is used for parsing tokens from the contents of the stream while BufferedReader just reads the stream and