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If you have Java conditional compilation debugging on your machine, we hope this tutorial will help you. This is generally a good way to focus on the differences when programming your cross-platform application, and when distinguishing between debug and publish configurations in your code. With conditional compilation, you can set up one or more “compiler variables” and evaluate their existence or meaning in your code.
You want to mustachelove compilation and Javadoes not seem to offer.
Use constants or command lineArguments depending on the current target.
Some older languages like PL / I, Crophone and C ++ have familiar features.as dependent compilation. ConditionalCompilation, which means that parts of the whole program can be written orexcluded because of the condition at the time. Thingit is often used to include or exclude Debug instructions for printing. When it appearsThe artist has a crisis in his work programHybris also removes all error checking :-). GeneralThe reason is that the developer intends to create a complete program.less is a profitable target – or run faster by removingconditional expressions.
Are conditionals evaluated at compile time or runtime?
Requests for the conditions listed above are evaluated at the time of collection. If you use this last static boolean instead, enableFast = “true” .equals (System.getProperty (“fast”)); Then all conditions depending on enableFast can be evaluated by the JIT compiler. Efforts for this are negligible. Share this answer to improve Follow
Although there is no explicit dependent compilation in Java,a kind of conditional system in an implicit language. All JavaIt is imperative that the compiler doesAnalyze to allow all streamsUsing a local variable iterates over the new instruction it assignsfirst Value, since all return values of the function are passed, which are easily accessible onby the way, somewhere providing a return value. Imagine thatThe compiler starts when it finds a if statementwhose bet is known to be incorrectTime. Why would he even generate code for this?State? It’s true, you say, but how do you see the results?Should the if statement be called at compile time? Simple:to final boolean variables.Also, if the value of the if condition is knownbe forged, then the body of the if statementalso shouldn’t be generated by the compiler.conditional compilation!
What is conditional compilation in C++?
This is a good way to deal with differences in targets when programming the appropriate cross-platform application, or when distinguishing between debug configurations and release dates in your code. Conditional compilation allows users to specify one or more “compiler variables” and optionally check for their existence or value throughout the code.
// IfDef.javafinal boolean DEBUG = false;System.out.println ("Hello everyone");if (DEBUGGING) System.out.println ("Life is a journey, not a destination");
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A selection related to this program and reviewed by the school administrationThe file shows that the string “Hello” has been started but appearsThe conditionally printed epigram does not correspond to reality. GenerallyThe class file is usually omitted I looked into println . SoJava has its own compilation mechanism.
Darian $ Junior IfDef jikes + E IfDef.java SiDefHello Java worlddarian $ strings IfDef.class | grep # no life found!darian $ javac IfDef. # java try another compilerdarian $ strings IfDef.class grep | # Life has not yet been found!Darian $
And if we want to use a similar debugging law, butIs the state selected at runtime? We can use System.properties (section 2.3)bring the variable. Section 1.12 can use my. useThe Debug class as an example of all their complexityThis way the behavior is controlled.
But usually it’s a great place as always for a key on another Function, online code generation. vC world a has the language keyword _ _inline , i.e.notifying the compiler that the function (method) is there and is not neededoutside the current source file. Hence, if a particular C compilerNative code generator, label for _ _inline The function can be improved with the actual body of the method, resulting inArgument stacking overhead taken You are under control,Get parameters and return values. Create method in Javafinal tells the compiler that it can be online to issuein the line. This could be search engine marketing that the compiler doesn’t do.must be effective, but may do so for reasons of efficiency.
Советы по устранению отладки Java с помощью условной компиляции
Dicas Com Relação à Resolução De Depuração Java Com Compilação Condicional
Tipps Zum Lösen Von Java-Debugging Mit Bedingter Kompilierung
Consejos Para Resolver La Depuración De Java Con Compilación Condicional
Tips För Att Lösa Java-felsökning Med Villkorlig Kompilering
조건부 컴파일로 Java 디버깅을 해결하기 위한 팁
Suggerimenti Per Risolvere Il Debug Java Con La Compilazione Condizionale
Tips Nodig Voor Het Oplossen Van Java-foutopsporing Met Voorwaardelijke Compilatie
Wskazówki Dotyczące Rozwiązywania Problemów Z Debugowaniem Java Za Pomocą Kompilacji Warunkowej
Conseils Pour Résoudre Le Débogage Java Avec Compilation Conditionnelle
