Difference Between Compiler And Runtime Error
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Difference Between Runtime And Compile Time Error
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Compile Time Error Vs Runtime Error Java
Join them; it only takes a minute: Sign up What is the difference between run-time error and compiler error? [duplicate] up vote 14 down vote favorite 7 This question already has an answer here: Runtime vs Compile time 19 difference between run time error and compile time error answers In one of my prof slides on ploymorphism, I see this piece of code with a couple of comments: discountVariable = //will produce (DiscountSale)saleVariable;//run-time error discountVariable = saleVariable //will produce //compiler error As you can see, it says in the first casting statement that it'll produce run-time error and in the other one it says it'll produce compiler error. What makes these errors? and how they differ from each other? java compiler-errors share|improve this question edited Nov difference between compile time error and runtime error in c# 16 '12 at 21:10 The Unfun Cat 4,25874065 asked Feb 27 '12 at 20:31 AbdullahR 1982414 marked as duplicate by assyliasjava Users with the java badge can single-handedly close java questions as duplicates and reopen them as needed. Jan 26 at 17:52 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. 15 Come on guys. The guy is trying to learn, downvotes are unnecessary. –JohnFx Feb 27 '12 at 20:35 3 Doesn't matter if it has addressed my example or not, what really matters is that I got the answer clearly. That guy explained it in a simple way that can be easy to understand to a naive programmer like me. –AbdullahR Feb 27 '12 at 20:54 Did you read the stackoverflow.com/faq ? –user647772 Feb 27 '12 at 21:00 Thank you AbdullahR, I hoped that from my example you could comprehend the difference and extrude the information you needed for your homework without me handing you the answer you need for your homework directly. –jwddixon Feb 27 '12 at 22:52 add a comment| 10 Answers 10 active oldest votes up vote 16 down vote accepted A run time error will only occur when the code is actually running. These are the most difficult - and lead to program crashes and
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Compile Time Error In C
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Compile Time Error Hackerrank
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 http://stackoverflow.com/questions/9471837/what-is-the-difference-between-run-time-error-and-compiler-error minute: Sign up Runtime vs Compile time up vote 180 down vote favorite 171 Can anyone please give me a good understanding of whats the difference between run-time and compile-time? compiler-construction runtime compile-time share|improve this question edited Oct 31 '09 at 13:35 e-satis 250k82236286 asked May 10 '09 at 21:06 devforall 1,812112641 add a comment| 19 Answers 19 active oldest votes up http://stackoverflow.com/questions/846103/runtime-vs-compile-time vote 255 down vote accepted The difference between compile time and run time is an example of what pointy-headed theorists call the phase distinction. It is one of the hardest concepts to learn, especially for people without much background in programming languages. To approach this problem, I find it helpful to ask What invariants does the program satisfy? What can go wrong in this phase? If the phase succeeds, what are the postconditions (what do we know)? What are the inputs and outputs, if any? Compile time The program need not satisfy any invariants. In fact, it needn't be a well-formed program at all. You could feed this HTML to the compiler and watch it barf... What can go wrong at compile time: Syntax errors Typechecking errors (Rarely) compiler crashes If the compiler succeeds, what do we know? The program was well formed---a meaningful program in whatever language. It's possible to start running the program. (The program might fail immediately, but at least we can try.) What are the inputs and outputs? Input was the program being compiled, plus any header files, interfaces, librarie
error? At compile time, when the code does not comply with the Java syntactic and semantics rules as described in Java Language Specification (JLS), compile-time errors will occurs. The goal of the compiler is to http://www.xyzws.com/javafaq/what-is-the-difference-between-compile-time-error-and-run-time-error/32 ensure the code is compliant with these rules. Any rule-violations detected at this stage are reported as compilation errors. The best way to get to know those rules is to go through all the sections in the http://pc.net/helpcenter/answers/compile_time_vs_runtime JLS containing the key words "compile-time error". In general, these rules include syntax checking: declarations, expressions, lexical parsing, file-naming conventions etc; exception handling: for checked exceptions; accessibility, type-compatibility, name resolution: checking to see all named entities - time error variables, classes, method calls etc. are reachable through at least one of the declared path; etc. The following are some common compile time errors: a class tries to extend more than one class overloading or overriding is not implemented correctly attempt to refer to a variable that is not in the scope of the current block an inner class has the same name as one of one of its enclosing classes a class contains one compile time error or more abstract methods and the class itself is not declared "abstract" a class tries to reference a private member of another class trying to create an instance of an abstract class trying to change the value of an already initialized constant (final member) declare two (class or instance) members with the same name Here is a list of conditions that may cause compile-time errors. When the code compiles without any error, there is still chance that the code will fail at run time. The errors only occurs at run time are call run time errors. Run time errors are those that passed compiler's checking, but fails when the code gets executed. There are a lot of causes may result in runtime errors, such as incompatible type-casting, referencing an invalid index in an array, using an null-object, resource problems like unavailable file-handles, out of memory situations, thread dead-locks, infinite loops(not detected!), etc. The following are some common runtime errors: trying to invoke a method on an uninitialized variable (NullPointerException) ran out memory (memory leaks...) (OutOfMemoryError) trying to open a file that doesn't exist (FileNotFoundException) trying to pass arguments to a method which are not within the accepted bounds (IllegalArgumentException) trying to invoke the start() method on a dead thread (IllegalThreadStateException) trying to invoke wait() or notify() on an object without owning the object'
that refer to different stages of software program development. In order to create a program, a developer first writes source code, which defines how the program will function. Small programs may only contain a few hundred lines of source code, while large programs may contain hundreds of thousands of lines of source code. The source code must be compiled into machine code in order to become and executable program. This compilation process is referred to as compile time. A compiled program can be opened and run by a user. When an application is running, it is called runtime. The terms "runtime" and "compile time" are often used by programmers to refer to different types of errors. A compile time error is a problem such as a syntax error or missing file reference that prevents the program from successfully compiling. The compiler produces compile time errors and usually indicates what line of the source code is causing the problem. If a program's source code has already been compiled into an executable program, it may still have bugs that occur while the program is running. Examples include features that don't work, unexpected program behavior, or program crashes. These types of problems are called runtime errors since they occur at runtime. Entered: July 6, 2011 – by Per Christensson Category: Software Next Software Question: How do I share a printer with multiple computers? All Software Questions Help Center Home Print Copyright © 2016 PC.net