Java Error Unhandled Exception Type Ioexception
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here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn unhandled exception java.io.ioexception android more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags java unhandled exception type exception Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, ioexception cannot be resolved to a type helping each other. Join them; it only takes a minute: Sign up Unhandled Exception Type IOException [duplicate] up vote 0 down vote favorite Possible Duplicate: Why do I get the “Unhandled exception type IOException”? I'm trying to java unhandled exception handler solve Euler #8 using the following algorithm. Problem is, whenver I modify the line I have the giant comment on, the error Unhandled Exception Type IOException appears on each line that I've marked with the comment //###. private static void euler8() { int c =0; int b; ArrayList
Unhandled Exception Type Exception Eclipse
character = (char) c; b = (int)character; bar.add(b); /*When I add this line*/ } reader.close(); //### } java file-io io ioexception share|improve this question edited Dec 19 '12 at 17:41 PhearOfRayne 3,83531837 asked Dec 19 '12 at 17:35 Bennett 951212 marked as duplicate by Lion, Hovercraft Full Of Eels, BalusC, Frank van Puffelen, nbrooks Dec 19 '12 at 19:40 This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question. 3 Read the Exceptions Tutorial and then use that knowledge to either wrap the code in a try/catch or throw the exception -- your choice. –Hovercraft Full Of Eels Dec 19 '12 at 17:36 add a comment| 4 Answers 4 active oldest votes up vote 5 down vote accepted Yes, IOException is a checked exception, which means you either need to catch it, or declare that your method will throw it too. What do you want to happen if the exception is thrown? Note that you should generally be closing the reader in a finally block anyway, so that it gets closed even in the face of another exception. See the Java Tutorial lesson on exceptions for more details about checked and unchecked exceptions. share|improve this answer answered Dec 19 '12 at 17:37 Jon Skeet 901k48765407465 I added thro
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Android Unhandled Exception Java Io Filenotfoundexception
Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation unhandled exception java lang exception android Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just java unhandled exception in lambda like you, helping each other. Join them; it only takes a minute: Sign up Why do I get the “Unhandled exception type IOException”? up vote 19 down vote favorite 6 I have the following simple code: import http://stackoverflow.com/questions/13957961/unhandled-exception-type-ioexception java.io.*; class IO { public static void main(String[] args) { BufferedReader stdIn = new BufferedReader(new InputStreamReader(System.in)); String userInput; while ((userInput = stdIn.readLine()) != null) { System.out.println(userInput); } } } And I get the following error message: ---------- 1. ERROR in io.java (at line 10) while ((userInput = stdIn.readLine()) != null) { ^^^^^^^^^^^^^^^^ Unhandled exception type IOException ---------- 1 problem (1 error)roman@roman-laptop:~/work/java$ mcedit io.java Does anybody have any ideas why? I just tried to simplify the http://stackoverflow.com/questions/2305966/why-do-i-get-the-unhandled-exception-type-ioexception/2305992 code given on the sum web site (here). Did I oversimplify? java stdin readline ioexception share|improve this question asked Feb 21 '10 at 13:14 Roman 14.2k94199287 add a comment| 4 Answers 4 active oldest votes up vote 24 down vote accepted You should add "throws IOException" to your main method: public static void main(String[] args) throws IOException { You can read a bit more about checked exceptions (which are specific to Java) in JLS. share|improve this answer answered Feb 21 '10 at 13:18 Marcin 4,91352946 add a comment| up vote 31 down vote Java has a feature called "checked exceptions". That means that there are certain kinds of exceptions, namely those that subclass Exception but not RuntimeException, such that if a method may throw them, it must list them in its throws declaration, say: void readData() throws IOException. IOException is one of those. Thus, when you are calling a method that lists IOException in its throws declaration, you must either list it in your own throws declaration or catch it. The rationale for the presence of checked exceptions is that for some kinds of exceptions, you must not ignore the fact that they may happen, because their happening is quite a regular situation, not a program error. So, the compiler helps you not to forget about the possibility of such an exception b
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta http://stackoverflow.com/questions/30587997/unhandled-exception-java-io-ioexception Discuss the workings and policies of this site About Us Learn http://stackoverflow.com/questions/7811468/unresolved-compilation-unhandled-exception-type-ioexception more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like unhandled exception you, helping each other. Join them; it only takes a minute: Sign up Unhandled Exception java.io.iOException up vote 0 down vote favorite I am getting unhandled exception java.io.IOException at compile time. I have posted the code below and pointed out the error line. I searched many post regarding to this issue but I don't get any relevant unhandled exception type solution. MainActivity.java: public class MainActivity extends Fragment { @Override public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) { ................... } public void startRecording() throws IOException { .................. } player.setOnCompletionListener(new OnCompletionListener() { public void onCompletion(MediaPlayer mp) { if (RecordFile != null && ifexist.equals("true")) { } else { if (isRecclicked == true) { recordButtonPressed = true; try { new Timer().schedule(new TimerTask() { @Override public void run() { // this code will be executed after 2 seconds startRecording(); ----> Unhandled Exception java.io.iOException } }, 2000); } catch (IOException e) { e.printStackTrace(); } } } } java android ioexception share|improve this question edited Jun 2 '15 at 5:43 dimo414 20.3k775119 asked Jun 2 '15 at 5:26 steve 1 1516 put code of startRecording .. Its crashing over there –Preethi Rao Jun 2 '15 at 5:29 @PreethiRao no crashing in startRecording() method.its compile errror –steve 1 Jun 2 '15 at 5:30 @steve1 show the startRecording() method..if there is no need for IOException then...try remove from throws IOException or you
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users 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 minute: Sign up Unresolved compilation: Unhandled exception type IOException up vote -1 down vote favorite When trying to write read an int from standard in I'm getting a compile error. System.out.println("Hello Calculator : \n"); int a=System.in.read(); The program throws an exception: Exception in thread "main" java.lang.Error: Unresolved compilation problem: Unhandled exception type IOException at SamplePackege.MainClass.main(MainClass.java:15) How do I fix this error? My Code : try { Scanner sc = new Scanner(System.in); int a=sc.nextInt(); } catch (Exception e) { // TODO: handle exception } java exception exception-handling share|improve this question edited Oct 18 '11 at 18:24 vzwick 6,16722755 asked Oct 18 '11 at 17:45 mrJack 34811027 3 get a good java tutorial first dude. –Thomas Jungblut Oct 18 '11 at 17:47 I tried to make the question better and provided a decent answer. –ScArcher2 Oct 18 '11 at 17:52 add a comment| 2 Answers 2 active oldest votes up vote 2 down vote in.read() can throw a checked exception of type IOException. You can read about Exception Handling in Java Here. You can either change your program to throw an IOException, or you can put the read in a try catch block. try{ int a=System.in.read(); catch(IOException ioe){ ioe.printStackTrace(); } or public static void main(String[] args) throws IOException { System.out.println("Hello Calculator : \n"); int a=System.in.read(); } share|improve this answer edited Oct 18 '11 at 17:53 answered Oct 18 '11 at 17:48 ScArcher2 42k3395146 add a comment| up vote 1 down vote The program doesn't have a bug. The method read() requires you to catch an Exception in case something goes wrong. Enclose the method inside a try/catchstatement: try { int a = System.in.read(); ... } catch (Exception e) { e.printStackTrace(); } In any case I strongly suggest you to use documentation and/or Java tutorials, in which the