Error Cannot Find Symbol Catch Ioexception E
Contents |
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and
Import Java.io.ioexception Meaning
policies of this site About Us Learn more about Stack Overflow the company cannot find symbol file Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users ioexception is never thrown in body of corresponding try statement Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a
What Is Ioexception In Java
minute: Sign up Java Try and Catch IOException Problem up vote 2 down vote favorite 2 I am trying to use a bit of code I found at the bottom of this page. Here is the code in a class that I created for it: import java.io.LineNumberReader; import java.io.FileReader; import java.io.IOException; public class LineCounter { public static int countLines(String filename) throws
Import Java.io.ioexception Cannot Be Resolved
IOException { LineNumberReader reader = new LineNumberReader(new FileReader(filename)); int cnt = 0; String lineRead = ""; while ((lineRead = reader.readLine()) != null) {} cnt = reader.getLineNumber(); reader.close(); return cnt; } } My objective is to count the lines of a text file, store that number as an integer, then use that integer in my main class. In my main class I tried a few different ways of making this happen, but (being a new programmer) I am missing something. Here is the first thing I tried: String sFileName = "MyTextFile.txt"; private int lineCount = LineCounter.countLines(sFileName); With this attempt I get the error "unreported exception java.io.IOException; must be caught or declared to be thrown." I don't understand why I am getting this because as I can see the exception is declared in my "countLines" method. I tried to use a try catch block right under that last bit of code I posted, but that didn't work either (I don't think I did it right though). Here is my try catch attempt: String sFileName = "MyTextFile.txt"; private int lineCount;{ try{ LineCounter.countLines(sFileName); } catch(IOException ex){ Sys
of 1 New Topic/Question Reply 4 Replies - 18465 Views unreported exception ioexception - Last Post: 19 February 2010 - 06:43
Import Ioexception
AM Rate Topic: #1 lupo66maniac New D.I.C Head Reputation: 0 Posts: 5 java filenotfoundexception Joined: 08-April 09 Error: cannot find symbol; class IOException Posted 08 April 2009 - 11:43 AM I'm not sure if I http://stackoverflow.com/questions/2397714/java-try-and-catch-ioexception-problem can explain this correctly. I have 2 programs. I am trying to catch an IOException from the 2nd one in the first but It won't let me compile. I am assuming I just have a syntax error somewhere but I can't find http://www.dreamincode.net/forums/topic/98086-error-cannot-find-symbol%3B-class-ioexception/ it. Any help would be appreciated. import java.awt.*; import java.awt.event.*; import java.awt.*; import javax.swing.*; public class E61 extends JFrame implements ActionListener { private static E61 Win; private static RahimIO RIO = new RahimIO(); private static String Author, Heading; private JLabel lblAuthor, lblHeading; private JPanel pnlHeading, pnlDisplay, pnlButtons; private JTextArea txtArea; private JButton btnCalc, btnExit; public E61() { super(Author); pnlHeading = new JPanel(new GridLayout(0,1,2,2)); pnlHeading.setBackground(Color.blue); pnlDisplay = new JPanel(new GridLayout(0,1,2,2)); pnlButtons = new JPanel(new GridLayout(0,2,2,2)); pnlHeading.setBackground(Color.blue); Container Pane = getContentPane(); Pane.setLayout(new BorderLayout(2,2)); Pane.setBackground(Color.blue); Pane.add(pnlHeading, "North"); Pane.add(pnlDisplay, "Center"); Pane.add(pnlButtons, "South"); lblAuthor = new JLabel(Author); lblAuthor.setOpaque(true); lblAuthor.setBackground(Color.yellow); lblAuthor.setFont(new Font("Serif", Font.BOLD, 35)); pnlHeading.add(lblAuthor); lblHeading = new JLabel(Heading); lblHeading.setOpaque(true); lblHeading.setBackground(Color.orange); lblHeading.setFont(new Font("Serif", Font.BOLD, 25)); pnlHeading.add(lblHeading); txtArea= new JTextArea(); txtArea.setEditable(false); txtArea.setBackground(Color.white); txtArea.setFont(new Font("Courier",Font.BOLD,16)); JScrollPane Scroller = new JScrollPane(txtArea); pnlDisplay.add(Scroller); btn
rebstock kyle rebstock 2,019 Points error: cannot find symbol reader.read(charArray); I followed the instructions https://teamtreehouse.com/community/error-cannot-find-symbol-readerreadchararray line by line and even tried looking into the documentation, then looked in the forums. I get this error on the last part of the code challenge. https://www.sitepoint.com/community/t/printstream-in-java/6175 I have tried an uppercase Reader.read and a lowercase reader.read. error: cannot find symbol reader.read(charArray); here is my code String responseData = ""; try { URL cannot find treehouseUrl = new URL("http://blog.teamtreehouse.com/api/get_recent_summary/?count=20"); HttpURLConnection connection = (HttpURLConnection) treehouseUrl.openConnection(); connection.connect(); int responseCode = connection.getResponseCode(); if (responseCode == HttpURLConnection.HTTP_OK) { // Code to read InputStream goes here! InputStream inputStream = connection.getInputStream(); Reader read = new InputStreamReader(inputStream); int contentLength = connection.getContentLength(); char[] charArray = new char[contentLength]; Reader.read(charArray); } } catch (MalformedURLException e) { Log.e(TAG, "MalformedURLException caught!", cannot find symbol e); } catch (IOException e) { Log.e(TAG, "IOException caught!", e); } kyle rebstock 2,019 Points kyle rebstock kyle rebstock 2,019 Points 2y ago Ah I found my problem was that I was trying a syntax like Class.read when it should have been lowercase as in the reader object I created then .read. So if I created a Reader object named asdf: Reader asdf = new InputStreamReader(intputStream); Then later I would call asdf.read(charArray); Such a simple mistake haha. Thanks so much to you. 1 Answer Jaroslav Vankat 12,054 Points Jaroslav Vankat Jaroslav Vankat 12,054 Points almost 2 years ago This code works for me: String responseData = ""; try { URL treehouseUrl = new URL("http://blog.teamtreehouse.com/api/get_recent_summary/?count=20"); HttpURLConnection connection = (HttpURLConnection) treehouseUrl.openConnection(); connection.connect(); int responseCode = connection.getResponseCode(); if (responseCode == HttpURLConnection.HTTP_OK) { // Code to read InputStream goes here! InputStream inputStream = connection.getInputStream(); Reader reader = new InputStreamReader(inputStream); char[] charArray = new char[connection.getContentLength()]; reader.read(charArray); } } catch (MalformedURLException e) {
server should printstream that data back to the client. So that i can display it in flash. Any help would be appreciated. import java.io.IOException; import java.io.PrintStream; import java.net.ServerSocket; import java.net.Socket; import java.io.*; public class MultiThreadServer implements Runnable { Socket csocket; MultiThreadServer(Socket csocket) { this.csocket = csocket; } public static void main(String args[]) throws Exception { ServerSocket ssock = new ServerSocket(1234); System.out.println("Listening"); while (true) { Socket sock = ssock.accept(); System.out.println("Connected"); BufferedReader br = new BufferedReader(new InputStreamReader(sock.getInputStream())); PrintStream ps = new PrintStream( sock.getOutputStream()); ps.println(br.readLine()); if(br.readLine()==("data")) new Thread(new MultiThreadServer(sock)).start(); } } public void run() { try { System.out.println("hello"); PrintStream pstream = new PrintStream(csocket.getOutputStream()); while(true) { try{ pstream.println("dead&dead1" + "\\u0000"); Thread.sleep(1000); } catch (InterruptedException e) { e.printStackTrace(); } } //for (int i = 100; i >= 0; i--) { // pstream.println(i + " bottles of beer on the wall"); //} //pstream.close(); //csocket.close(); } catch (IOException e) { System.out.println(e); } } } Thanks hooknc 2010-05-11 15:48:54 UTC #2 AND.... what's the problem exactly? Also, you might consider using the [ code ] tag to help format your code, so that those of us that might try to help, can read your code better. shivam0101 2010-05-11 17:08:28 UTC #3 while (true) { Socket sock = ssock.accept(); System.out.println("Connected"); BufferedReader br = new BufferedReader(new InputStreamReader(sock.getInputStream())); str = br.readLine(); //multi(); PrintStream pstream = new PrintStream(csocket.getOutputStream()); i am getting the error "MultiThreadServer.java:27: non-static variable csocket cannot be referenced from a static context PrintStream pstream = new PrintStream(csocket.getOutputStream())"; hooknc 2010-05-11 17:48:34 UTC #4 Are you getting your error duri