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๐Ÿš€ ๊ธฐ๋ก๋ณด๋‹จ ๊ธธ๋ก์„ โญ
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์ „์ฒด๋ณด๊ธฐ (459)ํ• ์ผ(141)Java(34)Spring(22)python(21)gil.log(15)mysql(13)๊ฐœ๋…(10)์ž๋ฐ” ์„ฑ๋Šฅ ํŠœ๋‹ ์ด์•ผ๊ธฐ(9)์—๋Ÿฌ(8)Springboot(8)linux(8)JPA(8)์ž๋ฃŒ๊ตฌ์กฐ(7)eclipse(7)db(6)MacOS(6)sql(6)vscode(6)Swagger(6)jquery(6)์•Œ๊ณ ๋ฆฌ์ฆ˜(6)migration(6)Modern Java In Action(5)php(5)lambda(4)List(4)ide(4)JavaScript(4)@RequestParam(4)error(4)exception(4)stream(3)cors(3)set(3)API(3)class(3)DDaJa(3)EL(2)stack(2)collections(2)RequestHeader(2)queue(2)Interceptor(2)RequestBody(2)mac(2)์ž๋ฃŒํ˜•(2)abstract class(2)di(2)Cheat Sheet(2)coding test(2)ํ•ด๊ฒฐ(2)Map(2)vue.js(2)macbook(2)@PathVariable(2)404(2)param(2)regular expression(2)exception handling(2)String(2)ํƒ์ƒ‰(2)http(2)dictionary(2)REST API(2)interface(2)Spring boot(2)๋””์ž์ธ ํŒจํ„ด(2)jsp(2)REST(2)ํŠœ๋‹(2)preflight(2)COLUMN(2)jQuery Migrate(2)Java 8(2)restful api(2)MVC(2)aws(2)Builder(2)protocol(2)maven(2)Hibernate(2)MyBatis(2)parameter(2)์ •๊ทœ ํ‘œํ˜„์‹(2)@ExceptionHandler(2)Index(2)git(2)transaction(2)Text Mining(2)LomBok(2)Design Pattern(2)case(2)๊ณ„ํš(1)๊ธฐ์ˆ ๋ธ”๋กœ๊ทธ(1)terminal(1)functional programming(1)HashTable(1)์˜ˆ์™ธ์ฒ˜๋ฆฌ(1)StringBuilder(1)modjk(1)DispatcherServlet(1)data type(1)modelattribute(1)iteration(1)rpm(1)HashMap(1)์ƒํƒœ์ฝ”๋“œ(1)stomp(1)TreeMap(1)csrf(1)batch(1)HashSet(1)๋ณ€์ˆ˜๋ช…(1)PriorityQueue(1)CORS policy(1)๋งˆ์ด๊ทธ๋ ˆ์ด์…˜(1)๋ฒ„๋ธ” ์ •๋ ฌ(1)์„ ํƒ ์ •๋ ฌ(1)INSERT(1)Working set(1)๋น„๊ต์—ฐ์‚ฐ์ž(1)Mac Os(1)VO(1)optional(1)const(1)let(1)var(1)excel(1)tomcat(1)์ •๋ ฌ(1)์‹œ๊ฐ„๋ณต์žก๋„(1)ArrayList(1)annotation(1)anaconda(1)Table(1)hibernate.hbm2ddl.auto(1)sessionStorage(1)formData(1)์ž๋ฃŒ ๊ตฌ์กฐ(1)localstorage(1)resolver(1)file(1)์‹ ์ž…๊ฐœ๋ฐœ์ž(1)ํŒจํ„ด(1)Builder Pattern(1)AutoConfiguration(1)methods(1)bean(1)ํ•ด์ƒ๋„(1)header(1)yaml(1)์ œ์–ด๋ฌธ(1)์›์‹œํƒ€์ž…(1)์ฐธ์กฐํƒ€์ž…(1)aop(1)coding convention(1)junit(1)svn(1)environment(1)jar(1)DTO(1)PORT(1)require(1)Big O(1)StringBuffer(1)๊ฐ์ฒด ์ง€ํ–ฅ ํ”„๋กœ๊ทธ๋ž˜๋ฐ(1)options(1)RuntimeException(1)BigInteger(1)ObjectMapper(1)container(1)replace(1)๋‚™์„œ์žฅ(1)View(1)testcode(1)@Valid(1)dependency(1)include(1)wrapper(1)group by(1)durability(1)Isolation(1)controlleradvice(1)Junit 5(1)distinct(1)annotations(1)phantom read(1)dirty read(1)isolation level(1)ALTER TABLE(1)๋“€์–ผ ๋ชจ๋‹ˆํ„ฐ(1)commands(1)Camera(1)access token(1)first class(1)Primenumber(1)TreeSet(1)transient(1)ํƒ์š• ์•Œ๊ณ ๋ฆฌ์ฆ˜(1)๋ช…๋ นํ˜• ํ”„๋กœ๊ทธ๋ž˜๋ฐ(1)ํ™˜๊ฒฝ(1)์‚ฐ์ถœ๋ฌผ(1)pageContext(1)COALESCE(1)consistency(1)ANSI SQL(1)EXPLAIN PLAN(1)Data Dictionary(1)Math.class(1)LinkedHashSet(1)LinkedHashMap(1)PrimitiveType(1)ReferenceType(1)์„œ์‹(1)๊ด€์  ์ง€ํ–ฅ(1)์šฐ์„  ์ˆœ์œ„ ํ(1)Tibero(1)Command Object(1)HttpServletRequest(1)๋™์  ์ฟผ๋ฆฌ(1).find()(1)๋‚ด์žฅ ํ•จ์ˆ˜(1)DATE_FORMAT(1)NonClustered Index(1)Clustered Index(1)SQL Partition(1)์„ ํƒ๋ฌธ(1)webcam(1)TestCase(1)spring-boot-starter(1)DB Export(1)DB Import(1)ํ‘œ์ค€ Library(1)ddl auto(1)throwable(1)๊ต์ฐจ ์ถœ์ฒ˜ ๋ฆฌ์†Œ์Šค ๊ณต์œ (1)defaultdict(1)MyISAM(1)InnoDB(1)HandlerInterCeptor(1)์ผ๊ธ‰ ์‹œ๋ฏผ(1)moshi(1)MessageConverter(1)@lob(1)api server(1)enumerated(1)currentTimeMillis(1)@MappedSuperclass(1)๋ฌธ์žํ˜•(1)string class(1)CentOS 6.9(1)mirrorlist(1)ius(1)CentOS6.9(1)Logrotate(1)ํด๋ฆญ ์—ฐ๊ฒฐ(1)์ ์ธต์  ์ƒ์„ฑ์ž ํŒจํ„ด(1)JavaBeans Pattern(1)MVC ๋ชจ๋ธ(1)๋‹จ์ถ•ํ‚ค ์ •๋ฆฌ(1)Transfer Object Pattern(1)Service Locator(1)ํ”„๋กœํŒŒ์ผ๋ง ํˆด(1)Profiling Tool(1)์„ฑ๋Šฅ ์ธก์ •(1)Profilling Tool(1)์ž๋ฐ” ์„ฑ๋Šฅ ๊ฐœ์„  ์ด์•ผ๊ธฐ(1)์‘๋‹ต ์‹œ๊ฐ„ ํ”„๋กœํŒŒ์ผ๋ง(1)๋ฉ”๋ชจ๋ฆฌ ํ”„๋กœํŒŒ์ผ๋ง(1)Memory Profiling(1)ResponseTime Profiling(1)System Class(1)System Class Property Methods(1)VLOOKUP(1)nanoTime(1)emit(1)JMH(1)TransferObject(1)Implicit Objects(1)applicationScope(1)pageScope(1)initParam(1)sessionScope(1)requestScope(1)paramValues(1)MultiValueMap(1)@SessionAttributes(1)headerValues(1)Atomicity(1)Nonrepeatable Read(1)UncheckedException(1)CheckedException(1)์ด๊ธ‰ ์‹œ๋ฏผ(1)์ „์ฒด ๊ฒ€์ƒ‰(1)ModernJavaInAction(1)๋™์ž‘ ํŒŒ๋ผ๋ฏธํ„ฐํ™”(1)Behavior Parameterization(1)swagger2(1)-Dspring.profiles.active(1)Spring Fox(1)Java Builder(1)OAS_30(1)@ApiResponse(1)SWAGER_2(1)Kill(1)์ž๋ฐ” ORM ํ‘œ์ค€ JPA ํ”„๋กœ๊ทธ๋ž˜๋ฐ(1)web-app-filter-name-uniqueness(1)lsof(1)jjwt(1)์™ธ๋ถ€ ๋ชจ๋‹ˆํ„ฐ(1)M1 MacBook(1)alter table column(1)IDENTITY(1)@Temporal(1)์—ฐ๊ด€ ๊ด€๊ณ„ ์ฃผ์ธ(1)์–‘๋ฐฉํ–ฅ ๋งคํ•‘(1)๋‹ค๋Œ€์ผ ๊ด€๊ณ„(1)๊ณตํ†ต Entity(1)Column Field Mapping(1)์—ฐ๊ด€๊ด€๊ณ„ ํŽธ์˜ ๋ฉ”์†Œ๋“œ(1)RequestHeaderMapMethodArgumentResolver(1)HandlerMethodArgumentResolver(1)HandlerInterceptorAdapter(1)NoHandlerFoundException(1)Class.isAssignableFrom(1)MethodArgumentResolver(1)Handler Parameter(1)PathVariableMethodArgumentResolver(1)RequestParamMethodArgumentResolver(1)WebMvcConfigurer(1)AJP(1)Please use a personal access token instead(1)HandlerExceptionResolver(1)customize property(1)application.properties(1)@ConfigurationProperties(1)this.$ref(1)this.$parent(1)๋ฏธ๋ฆฌ์บ”๋ฒ„์Šค(1)Rfc3339DateJsonAdapter(1)์˜ˆ์™ธ ์ „ํ™˜(1)์˜ˆ์™ธ ํšŒํ”ผ(1)์˜ˆ์™ธ ๋ณต๊ตฌ(1)resolveException(1)OAS(1)regexp(1)1๋…„(1)algorithm(1)plan(1)Collection(1)access(1)slicing(1)ifnull(1)ps(1)instanceof(1)comparable(1)Rollback(1)formatting(1)ACID(1)comparator(1)@property(1)SIDEPROJECT(1)์ ‘๊ทผ ์ œํ•œ์ž(1)sequence(1)์†Œ์ˆ˜ ์ฐพ๊ธฐ(1)R(1)velog(1)tcp(1)Markdown(1)๋งˆํฌ๋‹ค์šด(1)์ž๋ฐ”(1)์กฐํ•ฉ(1)cookie(1)math(1)array(1)github(1)JWT(1)web(1)๋ฉด์ ‘(1)Module(1)OOP(1)Python3(1)iBatis(1)pattern(1)async(1)๋น„๋™๊ธฐ(1)Constraint(1)entity(1)runtime(1)framework(1)library(1)์Šคํ„ฐ๋””(1)Side Project(1)ssh(1)programmers(1)DP(1)์†Œ์ˆ˜(1)url(1)Database(1)BFS(1)spring security(1)IntelliJ(1)ํ† ์ดํ”„๋กœ์ ํŠธ(1)๋‹จ์ถ•ํ‚ค(1)cmd(1)hint(1)pycharm(1)ํ”„๋กœํŒŒ์ผ๋ง(1)๊ฒ€์ฆ(1)Generic(1)DFS(1)์ •๋ ฌ ์•Œ๊ณ ๋ฆฌ์ฆ˜(1)validator(1)jdk(1)linked list(1)component(1)POST(1)domain(1)Props(1)ํ•จ์ˆ˜ํ˜• ํ”„๋กœ๊ทธ๋ž˜๋ฐ(1)IoC(1)status code(1)IO(1)profile(1)json(1)counter(1)select(1)SYSTEM(1)๋ฌธ๋ฒ•(1)tuple(1)function(1)package(1)command(1)๋ฐ˜๋ณต๋ฌธ(1)์ˆœ์—ด(1)reference(1)recursion(1)servlet(1)
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[Java] Priority Queue(์šฐ์„  ์ˆœ์œ„ ํ)

PriorityQueue๋ž€ ์šฐ์„ ์ˆœ์œ„ ํ๋กœ์จ ์ผ๋ฐ˜์ ์ธ ํ์˜ ๊ตฌ์กฐ FIFO(First In First Out)๋ฅผ ๊ฐ€์ง€๋ฉด์„œ, ๋ฐ์ดํ„ฐ๊ฐ€ ๋“ค์–ด์˜จ ์ˆœ์„œ๋Œ€๋กœ ๋ฐ์ดํ„ฐ๊ฐ€ ๋‚˜๊ฐ€๋Š” ๊ฒƒ์ด ์•„๋‹Œ ์šฐ์„ ์ˆœ์œ„๋ฅผ ๋จผ์ € ๊ฒฐ์ •ํ•˜๊ณ  ๊ทธ ์šฐ์„ ์ˆœ์œ„๊ฐ€ ๋†’์€ ๋ฐ์ดํ„ฐ๊ฐ€ ๋จผ์ € ๋‚˜๊ฐ€๋Š” ์ž๋ฃŒ๊ตฌ์กฐ์ด๋‹ค.PriorityQu

2020๋…„ 12์›” 6์ผ
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0๊ฐœ์˜ ๋Œ“๊ธ€
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Map ์ปฌ๋ ‰์…˜ - HashMap, LinkedHashMap, Hashtable, TreeMap

Map ์ปฌ๋ ‰์…˜์€ Key์™€ Value๋กœ ๊ตฌ์„ฑ๋œ Entry ๊ฐ์ฒด๋ฅผ ์ €์žฅํ•˜๋Š” ๊ตฌ์กฐ๋ฅผ ๊ฐ€์ง€๊ณ  ์žˆ๋‹ค.ํ‚ค๋Š” ์ค‘๋ณต ์ €์žฅ๋  ์ˆ˜ ์—†๊ณ , ๊ฐ’์€ ์ค‘๋ณต ์ €์žฅ๋  ์ˆ˜ ์žˆ๋‹ค. ๋งŒ์•ฝ ๊ธฐ์กด ํ‚ค์™€ ๋™์ผํ•œ ํ‚ค๋กœ ๊ฐ’์„ ์ €์žฅํ•˜๋ฉด, ์ƒˆ๋กœ์šด ๊ฐ’์œผ๋กœ ๋ฐ”๋€Œ๊ฒŒ๋œ๋‹ค.Map ์ปฌ๋ ‰์…˜์—๋Š” HashMap, Hashtable

2020๋…„ 10์›” 18์ผ
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0๊ฐœ์˜ ๋Œ“๊ธ€

Set ์ปฌ๋ ‰์…˜ - HashSet, TreeSet, LinkedHashSet

HashSet์€ Set ์ธํ„ฐํŽ˜์ด์Šค์˜ ๊ตฌํ˜„ ํด๋ž˜์Šค์ด๋‹ค. Set ์ปฌ๋ ‰์…˜์€ ๊ฐ์ฒด๋ฅผ ์ค‘๋ณตํ•ด์„œ ์ €์žฅํ•  ์ˆ˜ ์—†๊ณ , ํ•˜๋‚˜์˜ null๋งŒ ์ €์žฅ ํ•  ์ˆ˜ ์žˆ๋‹ค.๋˜ํ•œ ์ €์žฅ ์ˆœ์„œ๊ฐ€ ์œ ์ง€๋˜์ง€ ์•Š๋Š”๋‹ค. ๋งŒ์•ฝ ์š”์†Œ์˜ ์ €์žฅ ์ˆœ์„œ๋ฅผ ์œ ์ง€ํ•ด์•ผ ํ•œ๋‹ค๋ฉด LinkedHashSet ํด๋ž˜์Šค๋ฅผ ์‚ฌ์šฉํ•ด์•ผ ํ•œ๋‹ค. S

2020๋…„ 10์›” 16์ผ
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0๊ฐœ์˜ ๋Œ“๊ธ€
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๋ฐฐ์—ด ๋ฆฌ์ŠคํŠธ(Array List)

๋ฐฐ์—ด ๋ฆฌ์ŠคํŠธ(Array List)๋Š” List ์ธํ„ฐํŽ˜์ด์Šค๋ฅผ ์ƒ์†๋ฐ›์€ ํด๋ž˜์Šค๋กœ ํฌ๊ธฐ๊ฐ€ ๊ฐ€๋ณ€์ ์œผ๋กœ ๋ณ€ํ•˜๋Š” ์„ ํ˜•๋ฆฌ์ŠคํŠธ๋‹ค.์ผ๋ฐ˜์ ์ธ ๋ฐฐ์—ด๊ณผ ๊ฐ™์€ ์ˆœ์ฐจ๋ฆฌ์ŠคํŠธ์ด๋ฉฐ ์ธ๋ฑ์Šค๋กœ ๋‚ด๋ถ€์˜ ๊ฐ์ฒด๋ฅผ ๊ด€๋ฆฌํ•œ๋‹ค๋Š”์ ์ด ์œ ์‚ฌํ•˜์ง€๋งŒ ํ•œ๋ฒˆ ์ƒ์„ฑ๋˜๋ฉด ํฌ๊ธฐ๊ฐ€ ๋ณ€ํ•˜์ง€ ์•Š๋Š” ๋ฐฐ์—ด๊ณผ๋Š” ๋‹ฌ๋ฆฌ ArrayList๋Š” ๊ฐ์ฒด

2020๋…„ 10์›” 16์ผ
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์—ฐ๊ฒฐ ๋ฆฌ์ŠคํŠธ(Linked List)

์—ฐ๊ฒฐ ๋ฆฌ์ŠคํŠธ, ๋งํฌ๋“œ ๋ฆฌ์ŠคํŠธ(linked list)๋Š” ๊ฐ ๋…ธ๋“œ๊ฐ€ ๋ฐ์ดํ„ฐ์™€ ํฌ์ธํ„ฐ๋ฅผ ๊ฐ€์ง€๊ณ  ํ•œ ์ค„๋กœ ์—ฐ๊ฒฐ๋˜์–ด ์žˆ๋Š” ๋ฐฉ์‹์œผ๋กœ ๋ฐ์ดํ„ฐ๋ฅผ ์ €์žฅํ•˜๋Š” ์ž๋ฃŒ ๊ตฌ์กฐ์ด๋‹ค. ์ด๋ฆ„์—์„œ ๋งํ•˜๋“ฏ์ด ๋ฐ์ดํ„ฐ๋ฅผ ๋‹ด๊ณ  ์žˆ๋Š” ๋…ธ๋“œ๋“ค์ด ์—ฐ๊ฒฐ๋˜์–ด ์žˆ๋Š”๋ฐ, ๋…ธ๋“œ์˜ ํฌ์ธํ„ฐ๊ฐ€ ๋‹ค์Œ์ด๋‚˜ ์ด์ „์˜ ๋…ธ๋“œ์™€์˜ ์—ฐ๊ฒฐ์„

2020๋…„ 10์›” 14์ผ
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0๊ฐœ์˜ ๋Œ“๊ธ€
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ํ(Queue)

ํ(queue)๋Š” ์ปดํ“จํ„ฐ์˜ ๊ธฐ๋ณธ์ ์ธ ์ž๋ฃŒ ๊ตฌ์กฐ์˜ ํ•œ๊ฐ€์ง€๋กœ, ๋จผ์ € ์ง‘์–ด ๋„ฃ์€ ๋ฐ์ดํ„ฐ๊ฐ€ ๋จผ์ € ๋‚˜์˜ค๋Š” FIFO (First In First Out)๊ตฌ์กฐ๋กœ ์ €์žฅํ•˜๋Š” ํ˜•์‹์„ ๋งํ•œ๋‹ค. ๋‚˜์ค‘์— ์ง‘์–ด ๋„ฃ์€ ๋ฐ์ดํ„ฐ๊ฐ€ ๋จผ์ € ๋‚˜์˜ค๋Š” ์Šคํƒ๊ณผ๋Š” ๋ฐ˜๋Œ€๋˜๋Š” ๊ฐœ๋…์ด๋‹ค.ํ๋Š” ๊ฐ„๋‹จํ•˜๊ฒŒ ์‹๋‹น์—์„œ ์ค„์„

2020๋…„ 10์›” 13์ผ
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0๊ฐœ์˜ ๋Œ“๊ธ€
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์Šคํƒ(Stack)

์Šคํƒ(Stack)์€ ํ•œ ์ชฝ ๋์—์„œ๋งŒ ์ž๋ฃŒ๋ฅผ ๋„ฃ๊ฑฐ๋‚˜ ๋บ„ ์ˆ˜ ์žˆ๋Š” ์„ ํ˜• ๊ตฌ์กฐ๋กœ ํ›„์ž…์„ ์ถœ(LIFO - Last In First Out)๋กœ ๋˜์–ด ์žˆ๋‹ค.์ž๋ฃŒ๋ฅผ ๋„ฃ๋Š” ๊ฒƒ์„ '๋ฐ€์–ด๋„ฃ๋Š”๋‹ค' ํ•˜์—ฌ ํ‘ธ์‰ฌ(push)๋ผ๊ณ  ํ•˜๊ณ  ๋ฐ˜๋Œ€๋กœ ๋„ฃ์–ด๋‘” ์ž๋ฃŒ๋ฅผ ๊บผ๋‚ด๋Š” ๊ฒƒ์„ ํŒ(pop)์ด๋ผ๊ณ  ํ•˜๋Š”๋ฐ, ์ด

2020๋…„ 10์›” 12์ผ
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0๊ฐœ์˜ ๋Œ“๊ธ€