problem about bufferedreader-Collection of common programming errors
Rajdeep Siddhapura
java java-util-scanner stdin bufferedreader inputstreamreader
In the given code,Input: 1 7Output: 1Output should be 7. What am I missing??import java.io.*; import java.util.*;class compiler {public static void main(String args[] ) throws Exception {BufferedReader br = new BufferedReader(new InputStreamReader(System.in));int testcases = Integer.parseInt(br.readLine());// System.out.println(“If this statement is added it works as expected!”)int n=Integer.parseInt(br.readLine());System.out.println(n);} }*I also tried using scanner
skaffman
java inputstream bufferedreader apache-commons-vfs
I am trying to read one line at a time using bufferedReader like followingBufferedReader.readLine() and I am getting the following stack trace.java.io.EOFException: Unexpected end of ZLIB input stream at java.util.zip.ZipFile$1.fill(ZipFile.java:240) at java.util.zip.InflaterInputStream.read(InflaterInputStream.java:141) at java.io.BufferedInputStream.fill(BufferedInputStream.java:218) at java.io.BufferedInputStream.read1(BufferedInputStream.java:258) at java.io.BufferedInputStream.read(Buffered
D.Singh
java input io bufferedreader
When I run the following code and type 50 when prompted for input:private static int nPeople;public static void main(String[] args) {nPeople = 0;System.out.println(“Please enter the amount of people that will go onto the platform : “);BufferedReader keyboard = new BufferedReader(new InputStreamReader(System.in));try {nPeople = keyboard.read();} catch (IOException e) {e.printStackTrace();}System.out.println(” The number of people entered –> ” + nPeople); }}I get the following output:Please en
Dukeling
java encoding replace bufferedreader
I got unexpected behavior while performing several operation on String.I found:String expectedString=”ami\303\261o”; its output is like: amiñoString str=”ami\\303\\261o”; its output is like: ami\303\261oorIf we read this string from file using BufferedReader(readline) its value is: ami\303\261oHow would I get a string of amiño from str=”ami\\303\\261o” or from reading the file (ami\303\261o) using the BufferedReader?Any kind of replace, conversion, regexp or anything is acceptable.
user1611395
java sockets bufferedreader serversocket printwriter
I’m trying to read data from socket using threading run method:@Override public void run() {while(true){try{String o = “”;socketServer = new ServerSocket(port);System.out.println(“Waiting for connection on port “+port+”.”);Socket socket = new Socket();socket = socketServer.accept();System.out.println(“Connection got.”);BufferedReader input = new BufferedReader(new InputStreamReader(socket.getInputStream()));int c;while(( c = input.read()) != -1)o += (char)c;PrintWriter output = new PrintWriter(s
user1971455
java process bufferedreader
In the while loop below I want to read only the newest line from Process p’s output, ignoring anything else that entered the buffer while the loop was sleeping. How do I do that?String s; Runtime r = Runtime.getRuntime(); Process p = r.exec(“SomeContinuousProgram”); myInput = new BufferedReader(new InputStreamReader(p.getInputStream()));while (true){if ((s = myInput.readLine()) != null) {System.out.println(s);} Thread.sleep(sleep); }
Travis Nelson
java windows parsing windows-xp bufferedreader
I have some code that does a Runtime exec and parses the results. On linux and Windows7, the code works fine for parsing the system commands, but on Win XP I am getting a blank line (“”) between each line that has content. Any ideas what might be happening here? Process output = Runtime.getRuntime().exec(command); BufferedReader br = new BufferedReader(new InputStreamReader(output.getInputStream())); while ((line = br.readLine()) != null) {//do stuff }
???
java ping bufferedreader runtime.exec
I managed to modify a program to ping peer computer and gets the ping counts. How can I parse out the time = ?ms from the ping count results, in real-time?Code:public static void main(String[] args) {String ip = “192.168.1.1 -n 10”;String pingResult = “”;String pingCmd = “ping ” + ip;try{Runtime r = Runtime.getRuntime();Process p = r.exec(pingCmd);BufferedReader in = new BufferedReader(new InputStreamReader(p.getInputStream()));String inputLine;while ((inputLine = in.readLine()) != null) {System
Secator
java bufferedreader
I am Getting a run time Exception while using this codeRuntime rt = Runtime.getRuntime(); System.out.println(“Executing ” + “uname -a”); Process x = rt.exec(“ping IP Address of system”); BufferedReader stdInput =new BufferedReader(new InputStreamReader(x.getInputStream())); BufferedReader stdError =new BufferedReader(new InputStreamReader(x.getErrorStream())); String line = null; while ((line = stdInput.readLine()) != null) {System.out.println(line); } x.waitFor();
jWeaver
console java-util-scanner bufferedreader java-6 java-5
I was reading about Console class, and in the very first line, it was written New to Java 6 and when we are running Java SE 6 from command line, then we are typically using console class objectSo, which means we are implicitly using console class through the command line ??Then, start searching about the console class, i found Input from console class in java and Console link. I conclude some pointsConsole class are only usable outside the IDE using System.console().readLine();Console class read
WATTO Studios
java bufferedreader
The below code is not getting executed completely after this line ” bufferedReader.readLine(); “. The Program works fine when i execute the system command with out mentioning IPAddress of the remote PC.class Test { public static void main(String arg[]) { Process p; Runtime runTime; String process = null; try { runTime = Runtime.getRuntime(); p = runTime.exec(“sc \\xx.xx.xx.xx query gpsvc”); // For Windows InputStream inputStream = p.getInputStream(); I
WATTO Studios
java file bufferedreader ioexception filenotfoundexception
I’m very confused on getting basic file reading to work with Java. Lots of mixed signals.I’ve tried it a couple different ways and I consistently get a not found exception each time. I’ve checked with a file object set to the current path to print the current directory and I am indeed in the directory the file I’m trying to open is in. The permissions are set so everyone can read. I’m not sure what is going on:BufferedReader infixLines = new BufferedReader ( new FileReader ( “input.infix” ))
epsac
java bufferedreader
I have the following code in java that calls the date command in the command prompt:// prepare command prompt runtime and process Runtime runtime = null; Process process = null;// prepare output stream OutputStream outputStream = null;try {runtime = Runtime.getRuntime(); // instantiate runtime objectprocess = runtime.exec(“date”); // get the current date in command prompt// read the output of executing date commandoutputStream = process.getOutputStream();// output the date responseSystem.out.pri
doonot
java process pdf-generation bufferedreader wkhtmltopdf
I am running wkhtmltopdf from Java. I create a process but this one seems to be hanging, as it repeats again and again the the console, also in the Task Manager.This is how I run wkhtmltopdf:String command = applicationLocation + “wkhtmltopdf.exe -O Landscape ” + reqURL + “?” + reqQuery + ” c:/PDF/” + folderName + “/” + id + “/” + folderName + “.pdf”; Process p = Runtime.getRuntime().exec(command);How can I “destroy” the process, after the job has been done?This did not work for me, the process
Zippy
java file-io bufferedreader readline
If I have something like this in my code:String line = r.readLine(); //Where r is a bufferedReaderHow can I avoid a crash if the next line is the end of the file? (i.e. null)I need to read the next line because there may be something there that I need to deal with but if there isn’t the code just crashes.If there is something there then all is OK, but I can’t be guaranteed that there will be something there.So if I do something like: (pseudo code):if (r.readLine is null) //End codeelse {check l
hqt
java bufferedreader filechannel
FileChannel will faster than BufferedReader, BufferedReader will more faster than Reader because FileChannel and BufferedReader has cut off some itermediate steps to receive data. My question is : the advantage is obvious, but I don’t see any source on web say about its disadvantage. (of FileChannel to BufferedReader, BufferedReader to Reader). What a problem when we cut off intermediate steps between.So, who can teach me,please.@:And, the same question for Output, too. Please tell me what disad
Keeb13r
java android exception-handling try-catch bufferedreader
I’m writing an Android application that is connecting to a website and retrieving search results in the form of JSON. This function is happening in an AsyncTask, which is set up as a separate stream from the UI. I need to handle the case where the connection is interrupted/non-existent/too latent. I need to handle this case in order to display an AlertDialog to the user letting them know the connection is bad. I’ve seen posts suggest setting a timeout parameter for URLConnection, but I’m not usi
cheese5505
java bufferedreader bufferedwriter
I am making a program for someone that read/writes to a file. I created it, and tested it, but it crashes when I tell it the name. Code:import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.DataInputStream; import java.io.FileInputStream; import java.io.FileWriter; import java.io.InputStreamReader; import java.util.Scanner;public class Main { public static void main(String[] args) throws Exception {Scanner scanner = new Scanner(System.in);print(“Enter a name for the bell:
JLaw
android bufferedreader fileinputstream
I’ve solved my own issue but I don’t know why my first attempt didn’t work and I was hoping someone could tell me why. I was also hoping if someone could tell me if my final solution is a “good” one or not (by this I mean, is it efficient)?This was my first attempt at reading an input file I had previously created:private byte[] mInputData;public void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.second_view);Intent myIntent = getIntent();mFilena
Zak
android json bufferedreader
i’ve got this code which work fine on android <4:try{URL url = new URL(“http://www.mysite.com/data.php”);BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream()));while((testo=in.readLine()) != null){testo2+=testo;}in.close();JSONObject jObject = new JSONObject(testo2);button.setText(jObject.getString(“n”));textView1a.setText(” “+jObject.getString(“so”));textView1b.setText(jObject.getString(“tc”)+” “);}catch(MalformedURLException e){System.out.println(“1”);}catch(IOExcep
Peter Lawrey
java bufferedreader
I have some problems reading file in java: my file is for example:3,4 2 6 4 1 7 3 8 9where first line 3 and 4 are the lenght of array A and B and then the element of each array. I made thisimport java.io.*; import java.util.Arrays;public class Progetto {public static void main(String args[]){ // Open the file that is the first // command line parameterFileInputStream fstream = new FileInputStream(“prova.txt”);BufferedReader br = new BufferedReader(new InputStreamReader(fstream));String strLine
NS114
java android bufferedreader urlconnection
I am trying to read the content of a URL. The initialization of the BufferedReader keeps causing the crash.I’ve tried looking up peoples’ solutions, but no matter what I do, I get this error.Here is my code:try {String sUrl = “http://www.google.com”;System.out.println(“About to create URL.”);URL url = new URL(sUrl);System.out.println(“Created URL”);System.out.println(“About to create URLConnection”);URLConnection urlc = url.openConnection();System.out.println(“Created URLConnection”);System.out.
user unknown
java bufferedreader numberformatexception
I have been trying to figure this out for couple of hours now and I hope one of you can help me. I have an file (actually two but thats not important) that have some rows and columns with numbers and blank spaces between. And I’m trying to read those with BufferedReader. And that works great. I can print out the strings & chars however I want. But when I try to parse those strings and chars I get the following error: Exception in thread “main” java.lang.NumberFormatException: For input strin
trashgod
java file-io jtable bufferedreader stringtokenizer
I am trying to replace character ( and ) from a file with a comma so that I can use the code below for entering data in to a JTable from a csv file. I have tried to do this by reading the file with a StringTokenizer and i’ve tried manipulating the way that I implement it and I can’t get it to run with NullPointerException. I understand that it can’t find an object that it is pointing to but i can’t see where my problem is. Any pointers would be great as I’ve been stuck on this for hours. Is the
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