Exception-type Java.lang.error /exception-type
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Java Unhandled Exception Type Exception
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Unhandled Exception Type Exception Eclipse
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 java unhandled exception handler 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 41.8k3295146 add a
Method java.lang Class Error java.lang.Object java.lang.Throwable java.lang.Error All Implemented Interfaces: Serializable Direct Known Subclasses: AnnotationFormatError, AssertionError,
Java Exceptions List
AWTError, CoderMalfunctionError, FactoryConfigurationError, FactoryConfigurationError, IOError, LinkageError, ServiceConfigurationError, ThreadDeath, TransformerFactoryConfigurationError, ioexception cannot be resolved to a type VirtualMachineError public class Error extends Throwable An Error is a subclass of Throwable that java checked exceptions indicates serious problems that a reasonable application should not try to catch. Most such errors are abnormal conditions. The ThreadDeath error, though a http://stackoverflow.com/questions/7811468/unresolved-compilation-unhandled-exception-type-ioexception "normal" condition, is also a subclass of Error because most applications should not try to catch it. A method is not required to declare in its throws clause any subclasses of Error that might be thrown during the execution of the method but not caught, since these https://docs.oracle.com/javase/7/docs/api/java/lang/Error.html errors are abnormal conditions that should never occur. That is, Error and its subclasses are regarded as unchecked exceptions for the purposes of compile-time checking of exceptions. Since: JDK1.0 See Also:ThreadDeath, Serialized FormSee The Java™ Language Specification: 11.2 Compile-Time Checking of Exceptions Constructor Summary Constructors Modifier Constructor and Description Error() Constructs a new error with null as its detail message. Error(Stringmessage) Constructs a new error with the specified detail message. Error(Stringmessage, Throwablecause) Constructs a new error with the specified detail message and cause. protected Error(Stringmessage, Throwablecause, booleanenableSuppression, booleanwritableStackTrace) Constructs a new error with the specified detail message, cause, suppression enabled or disabled, and writable stack trace enabled or disabled. https://www.tutorialspoint.com/java/lang/java_lang_exceptions.htm Java.lang - InheritableThreadLocal Java.lang - Integer Java.lang - Long Java.lang - Math http://www.tutorialspoint.com/servlets/servlets-exception-handling.htm Java.lang - Number Java.lang - Object Java.lang - Package Java.lang - Process Java.lang - ProcessBuilder Java.lang - Runtime Java.lang - RuntimePermission Java.lang - SecurityManager Java.lang - Short Java.lang - StackTraceElement Java.lang - StrictMath Java.lang - String Java.lang - StringBuffer Java.lang - StringBuilder Java.lang - System Java.lang - unhandled exception Thread Java.lang - ThreadGroup Java.lang - ThreadLocal Java.lang - Throwable Java.lang - Void Java.lang Package extras Java.lang - Interfaces Java.lang - Errors Java.lang - Exceptions Java.lang Package Useful Resources Java.lang - Useful Resources Java.lang - Discussion Selected Reading Developer's Best Practices Questions and Answers Effective Resume Writing HR Interview Questions Computer Glossary Who is Who Java.lang.Exceptions Advertisements Previous Page Next java unhandled exception Page Introduction The java.lang.Exceptions provides for different exceptions thrown under java lang package. Exception Summary S.N. Exception & Description 1 ArithmeticException This is Thrown when an exceptional arithmetic condition has occurred. 2 ArrayIndexOutOfBoundsException This is Thrown to indicate that an array has been accessed with an illegal index. 3 ArrayStoreException This is Thrown to indicate that an attempt has been made to store the wrong type of object into an array of objects. 4 ClassCastException This is Thrown to indicate that the code has attempted to cast an object to a subclass of which it is not an instance. 5 ClassNotFoundException This is Thrown when an application tries to load in a class through its string name using: The forName method in class Class. 6 CloneNotSupportedException This is Thrown to indicate that the clone method in class Object has been called to clone an object, but that the object's class does not implement the Cloneable interface. 7 EnumConstantNotPresentException This is Thrown when an application tries to access an enum constant by name and the enum
Servlets - Life Cycle Servlets - Examples Servlets - Form Data Servlets - Client Request Servlets - Server Response Servlets - Http Codes Servlets - Writing Filters Servlets - Exceptions Servlets - Cookies Handling Servlets - Session Tracking Servlets - Database Access Servlets - File Uploading Servlets - Handling Date Servlets - Page Redirect Servlets - Hits Counter Servlets - Auto Refresh Servlets - Sending Email Servlets - Packaging Servlets - Debugging Servlets - Internationalization Servlet Useful Resources Servlets - Questions and Answers Servlets - Quick Guide Servlets - Useful Resources Servlets - Discussion Selected Reading Developer's Best Practices Questions and Answers Effective Resume Writing HR Interview Questions Computer Glossary Who is Who Servlets - Exception Handling Advertisements Previous Page Next Page When a servlet throws an exception, the web container searches the configurations in web.xml that use the exception-type element for a match with the thrown exception type. You would have to use the error-page element in web.xml to specify the invocation of servlets in response to certain exceptions or HTTP status codes. web.xml Configuration: Consider, you have an ErrorHandler servlet which would be called whenever there is any defined exception or error. Following would be the entry created in web.xml.