interfacesjava

195AAbstractSpliteratorconstructor,85IMMUTABLEandCONCURRENT,85newstreamgeneration,88–89NONNULLcharacteristic,85ORDEREDandSORTED,85Parallelvs.
inSequence,82ResultSetSpliteratorclass,86SIZEDandSUBSIZEDcharacteristics,85tryAdvancemethod,84BBinaryOperator.
maxBymethod,27BinaryOperator.
minBymethod,27CCheckedexception,51computeIfAbsentmethod,42ConcurrencyExecutorServiceadvantages,101Callableinterface,101futures.
parallelStream(),102sourcecode,101–102ThreadPoolExecutor(seeThreadPoolExecutor)ForkJoinPoolclass,106–107PrimeGeneration,95–97streamparallelism,107–109Threadclass,98–100D,EDataaccessimmutableJavaobject,73Javavirtualmachine,74mappingandprintingout,93multiplethreadprocessing,74POJOsvs.
aStreamofFuJI,75resultprintingout,76ResultSetmappingAbstractSpliterator(seeAbstractSpliterator)iterator(seeIterator)result-basederrorhandling,80StreamBuilder,79Stream.
ofandStream.
flatMap,79WordUsage,78TemplatePOJOvs.
aTemplateFuJI,75UMLdiagram,71Declarativeparadigm,191Defaultmethods,24FflatMapfunction,46forEachmethod,37FuJI,74FunctionalinterfacehelpermethodsBinaryOperator.
maxBy,27BinaryOperator.
minBy,27Consumer.
andThen,26Function.
andThen,26Function.
compose,26Function.
identity(),26Predicate.
andandPredicate.
or,27Predicate.
isEqual,27Predicate.
negate,27UnaryOperator.
identity(),26Functionalprogramming,JdbcTemplate,6FunFile.
getLinesInDirectory(boolean)Method,68FunFile.
listFiles(boolean)Method,67GgetOrDie()method,59Indexindex196HHandlingresourcesclosedinputstreams,113–114closeException,112exception-handlingcallerflatMapmethod,121Optionalclass,118single-methodinterfaces,118java.
lang.
AutoCloseable,112operations,113Resultobject,123uncheckedexceptionIOExceptions,115unhandledexception,116–117hasResult()method,59Homoiconicparadigm,190IifPresentandifNotPresentmethods,59Imperativeprogrammingparadigmdefiniton,156imperativedatabaseloading,156Input/output(I/O)complexstreamprocessing,63FunFile.
getLines(),66FunFile.
getLinesInDirectory(boolean)method,68FunFile.
listFiles(boolean)method,67getLines()method,67–68java.
nio.
file.
Filesclass,66StreamofStringinstances,63temporaryfilesCallbackonError,61Consumerinterface,61exceptionalbehavior,52ExceptiononError,62File.
createTempFile(String,String)call,52file.
delete()call,52function.
applycall,52getOrDie()method,59hasResult()method,59"holeinthemiddle"pattern,52ifPresentandifNotPresentmethods,59null,53NullPointerException,54Optionalclass,53resultclass,55Returnclassconstructors,60standardbehavior,52TempFileCreation,54,60whenmethod,60Walkmethod,67IteratorDISTINCT,IMMUTABLE,andNONNULL,92implementation,89streamcreation,92J,KJava8closuresanonymousinnerclass,13encapsulatingfunction,13lambdacalculus,13Lava8,14comparator,3compiler,31complexbodycreation,18concurrentprogramming,28constructors,22explicittyping,19forloop,5functionalinterfacehelpermethodsBinaryOperator.
maxBy,27BinaryOperator.
minBy,27Consumer.
andThen,26Function.
andThen,26Function.
compose,26Function.
identity(),26Predicate.
andandPredicate.
or,27Predicate.
isEqual,27Predicate.
negate,27UnaryOperator.
identity(),26functionalprogrammingAPI,8cutting-edgeprogrammingparadigm,7mathematicalfunctions,4Scala,9typeinference,8FunJavalibrary,9identityFunction(),11implementationCommons-Collections,cloneWithoutNulls(List),2GoogleGuava,cloneWithoutNulls(List),2Lambda,3original,1predicates,2refined,1inline,28instancemethods,22interfaceimplementationdefaultmethods,24lambdaconversion,23singleabstractmethod,23staticmethods,25targettype,23Index197interfaces,28methodreference,28multi-argument,15NullPointerException,29object-orientedprogram,3operators,19partialfunctionapplicationapplyPartialmethod,16–17consumerandBiConsumer,18curryingmethod,17greetFolksmethod,16predication,20primitivearguments,20RowMapperinterface,8softwaredevelopment,3specification,23staticmethods,21Streamobject,9test-drivendevelopment,4type-specificmethods,31Zalgo,29zeroargumentfunction,14Javabytecodeaccessflags,142classfile,140constantpool,142constructor,144definition,139inlinelambda,150java.
lang.
String.
Object,143javapcommand,141lambdalifting,150localvariables,144mainmethod,143methodreferenceboundinstance,147freeinstance,149–150getSuppliermethod,146invokedynamicinstruction,146lambdiseMemethod,146metafactorymethod,147staticmethod,145–146Objectclass,144stack-basedlanguage,144L,M,NLambdaconcurrencyclassicJavathreads,98ExecutorService,100Fork/Join,106primegeneration,95streamparallelism,107ThreadPoolExecutorbunchofvariables,105codeimplementation,105constructor,103–104interfaceimplementations,102limitation,103semanticvariables,104threadFactoryandhandlerinline,103Lambda'sdomaincollectionsandmapscomputeIfAbsentmethod,42computeIfPresentmethod,42–43computemethod,43countmethod,43–44defaultvalues,41–42filtering,38–39List.
replaceAllmethod,39–41functionaliterationforEachmethod,37forloop,37Map.
forEach,37post-functionallanguages,38functionalprogrammingCollectionAPI,34comprehension,34Function:T,33I/Ostreams,34LibraryandBookclasses,34streamscollectingandprocessing,47–48creation,45IteratorAPI,44lifecycle,44mappingandfiltering,45,47primitivetypes,48reducingstreams,48Lava8,14Legacycodeabstractmethod,133arraysandstreams,130collectionsandstreamsarrays,127Collectorimplementation,130ImmutableListandImmutableSet,129sequential/parallelstream,127thread-safecollection,128goals,137interfaces,131optionals,135–136resources(seeHandlingresources)List.
replaceAllmethod,39,41Logical/mathematicalparadigm,190index198OObject-orientedprogrammingparadigmDatabaseloading,156–161defintion,161interfacesandabstractbaseclasses,177textparsing,162P,QPlainImmutableJavaObjects(PIJO),74Post-functionalprogrammingparadigmdatabaseloading,178defintion,177drawbacks,189Post-modernprogramminglanguages,192RReactiveparadigm,191SShakespeareAnthologyParser,162ShakespeareTextParser,162Singleabstractmethod,23Sonnets,154–155Spliterator,82Stack-basedparadigm,192Staticmethods,25Streamparallelism,107TTab-separatedvalue(TSV),76ThreadPoolExecutorbunchofvariables,105codeimplementation,105constructor,104interfaceimplementations,102limitation,103semanticvariables,104threadFactoryandhandlerinline,103TSV()method,76U,VUncheckedexceptions,51W,X,Ywhenmethod,60ZZalgo,29