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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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[Spring] DispatcherServlet์˜ ์˜ˆ์™ธ์ฒ˜๋ฆฌ ์ „๋žต(HandlerExceptionResolver)

ํ˜„์žฌ ๊ฐœ๋ฐœํ•˜๊ณ  ์žˆ๋Š” ํ”„๋กœ์ ํŠธ๋‹จ์—์„œ JWT๋ฅผ ํ™œ์šฉํ•œ ์ธ์ฆ์ด ํ•„์š”ํ•œ Handler๋ฅผ ๊ณตํ†ต์ ์œผ๋กœ ์ธ์ฆ ๊ณผ์ •์„ ์ˆ˜ํ–‰ํ•˜๋Š” HandlerInterceptorAdapter๋ฅผ ์ƒ์†๋ฐ›๋Š” JwtInterceptor๋ฅผ ์œ„์™€ ๊ฐ™์ด ์‚ฌ์šฉํ•˜๊ณ  ์žˆ์—ˆ๋‹ค. ์œ„ ์ธ์ฆ ๊ณผ์ • ์ค‘ ์ธ์ฆ ์‹คํŒจ์‹œ ์•„๋ž˜ ์ฒ˜

2021๋…„ 9์›” 29์ผ
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0๊ฐœ์˜ ๋Œ“๊ธ€
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[Moshi] java.util.Date Type ์—ญ์ง๋ ฌํ™” Error ํ•ด๊ฒฐ (Rfc3339DateJsonAdapter)

How to send Date object through Moshi JSON serializer?์•„๋ž˜์™€ ๊ฐ™์€ API์˜ Response๋ฅผ Moshi๋กœ ์—ญ์ง๋ ฌํ™” ํ•˜๋ ค๋Š” ๊ณผ์ •์—์„œ,์•„๋ž˜ ์—๋Ÿฌ๊ฐ€ ๋ฐœ์ƒํ–ˆ๋‹ค.์—ญ์ง๋ ฌํ™”๋ฅผ ์ˆ˜ํ–‰ํ•˜๋˜ ์ฝ”๋“œ๋Š” ์•„๋ž˜์™€ ๊ฐ™๊ณ ,๊ฐ์ฒด๋กœ ๋‹ด์„ Class๋Š” ์•„๋ž˜์™€ ๊ฐ™

2021๋…„ 8์›” 30์ผ
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[Java] Generic

Generic Generic์€ ํ•˜๋‚˜์˜ Data ํ˜•์‹์— ์˜์กดํ•˜์ง€ ์•Š๊ณ , ํ•˜๋‚˜์˜ ๊ฐ’์ด ์—ฌ๋Ÿฌ๊ฐ€์ง€ Data Type์„ ๊ฐ€์งˆ ์ˆ˜ ์žˆ๋„๋ก ํ•˜๋Š” ๋ฐฉ๋ฒ•์ด๋‹ค. Generic : ํฌ๊ด„์ ์ธ, ๋‹จ ํ•˜๋‚˜์— ์ •ํ•ด์ง€์ง€์•Š๊ณ  ๋ฒ”์šฉ์ ์ด๊ณ  ์ผ๋ฐ˜์ ์ธ ๊ฒƒ ํ”ํžˆ ์•„๋ž˜์™€ ๊ฐ™์ด ์‚ฌ์šฉ๋œ๋‹ค.

2021๋…„ 8์›” 16์ผ
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[Java] instanceof, Class.isAssignableFrom

instanceof ์™€ Class.isAssignableFrom ์˜ ์ฐจ์ด์ instanceof๋Š” ํ•ด๋‹น Object๊ฐ€,ํŠน์ • Class, Interface๋ฅผ ์ƒ์†ํ•˜๊ฑฐ๋‚˜ ๊ตฌํ˜„ ํ–ˆ๋Š”์ง€๋ฅผ,boolean type์œผ๋กœ returnํ•ด์ฃผ๋Š” method์ด๋‹ค.Class.isAssignabl

2021๋…„ 7์›” 23์ผ
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[Java] Java8๊ณผ Lambda

Java 8์—์„œ๋Š” ๊ธฐ๋ช… ๋ฉ”์†Œ๋“œ(Named Method)๋ฅผ ์ผ๊ธ‰ ๊ฐ’(์ผ๊ธ‰ ์‹œ๋ฏผ)์œผ๋กœ ์ทจ๊ธ‰ํ•  ๋ฟ ์•„๋‹ˆ๋ผ, Lambda ๋˜๋Š” ์ต๋ช… ํ•จ์ˆ˜(Anonymous Functions)๋ฅผ ํฌํ•จํ•˜์—ฌ ํ•จ์ˆ˜๋„ ๊ฐ’์œผ๋กœ ์ทจ๊ธ‰ํ•  ์ˆ˜ ์žˆ๋‹ค. ์˜ˆ๋ฅผ ๋“ค๋ฉด (int x) -> x + 1 ์ฆ‰ x๋ผ๋Š” ์ธ์ˆ˜

2021๋…„ 6์›” 16์ผ
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0๊ฐœ์˜ ๋Œ“๊ธ€

[Java] Java8 ์„ค๊ณ„์˜ ๋ฐ‘๋ฐ”ํƒ• - ๋ณ‘๋ ฌ์„ฑ, ๊ฐ€๋ณ€ ๋ฐ์ดํ„ฐ, Method ์ผ๊ธ‰ ์‹œ๋ฏผํ™”

๋ณ‘๋ ฌ์„ฑ๊ณผ ๊ณต์œ  ๊ฐ€๋ณ€ ๋ฐ์ดํ„ฐ Java 8 ์„ค๊ณ„์˜ ์„ธ ๋ฒˆ์งธ ํ”„๋กœ๊ทธ๋ž˜๋ฐ ๊ฐœ๋…์€ ๋ณ‘๋ ฌ์„ฑ์„ ๊ณต์งœ๋กœ ์–ป๋Š”๋‹ค. ์ด๋‹ค. ๋ณ‘๋ ฌ์„ฑ์„ ์–ป๊ธฐ ์œ„ํ•ด์„œ๋Š” Stream ๋ฉ”์†Œ๋“œ๋กœ ์ „๋‹ฌํ•˜๋Š” ์ฝ”๋“œ์˜ ๋™์ž‘ ๋ฐฉ์‹์„ ๋ณ€๊ฒฝํ•ด์•ผ ํ•œ๋‹ค. Stream ๋ฉ”์†Œ๋“œ๋กœ ์ „๋‹ฌํ•˜๋Š” ์ฝ”๋“œ๋Š” ๋‹ค๋ฅธ ์ฝ”๋“œ์™€ ๋™์‹œ์— ์‹คํ–‰ํ•˜๋”๋ผ๋„

2021๋…„ 6์›” 14์ผ
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0๊ฐœ์˜ ๋Œ“๊ธ€

[Java] Java8 ์„ค๊ณ„์˜ ๋ฐ‘๋ฐ”ํƒ• - Stream ์ฒ˜๋ฆฌ

Stream ์ฒ˜๋ฆฌ Java 8 ์˜ ์„ค๊ณ„์˜ ๋ฐ‘๋ฐ”ํƒ•์ด ๋˜๋Š” ์„ธ ๊ฐ€์ง€ ํ”„๋กœ๊ทธ๋ž˜๋ฐ ๊ฐœ๋…์ด ์žˆ๋‹ค. ๊ทธ ์ค‘ ํ•˜๋‚˜๊ฐ€Stream ์ฒ˜๋ฆฌ์ด๋‹ค. Stream์ด๋ž€ ํ•œ ๋ฒˆ์— ํ•œ ๊ฐœ์”ฉ ๋งŒ๋“ค์–ด์ง€๋Š” ์—ฐ์†์ ์ธ Data ํ•ญ๋ชฉ๋“ค์˜ ์ง‘ํ•ฉ์ด๋‹ค. Java 8์˜ Stream ๊ด€๋ จ ๋‚ด์šฉ์„ ์‚ดํŽด๋ณด๊ธฐ ์ „ St

2021๋…„ 6์›” 9์ผ
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[VSCode] Java JDK Runtime ์„ค์ •ํ•˜๊ธฐ

VSCODE ํ™˜๊ฒฝ SpringBoot ๊ฐœ๋ฐœํ™˜๊ฒฝ\[Dreamer]VSCode์—์„œ JDK Runtime ํ™˜๊ฒฝ ์„ค์ •์„ ํ•ด๋ณด๋ คํ•œ๋‹ค.์‹œ์ž‘ํ•˜๊ธฐ์— ์•ž์„œ, ๋ณธ์ธ์˜ ๊ฐœ๋ฐœํ™˜๊ฒฝ์— JAVA_HOME ์„ค์ •์„ ํ•ด์ฃผ์–ด์•ผ ํ•˜๋Š”๋ฐ,Java ํ™˜๊ฒฝ ์„ค์ •์ด ์•ˆ๋˜์–ด์žˆ๋‹ค๋ฉด, ์—ฌ๊ธฐ๋ฅผ ๋”ฐ๋ผ๊ฐ€๋ฉด ๋œ๋‹ค. ๋‚˜๋Š” Ma

2021๋…„ 6์›” 2์ผ
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[MacOS] MacBook Java Home ํ™˜๊ฒฝ ๋ณ€์ˆ˜ ์„ค์ •

VSCode์—์„œ Spring Boot๋กœ ์ž‘์—…ํ• ๊ฒŒ ์ƒ๊ฒผ๋Š”๋ฐ, JDK Java Home ์„ค์ •์„ ํ•ด์ค˜์•ผ ํ•˜๋Š” ๋ถ€๋ถ„์ด ์ƒ๊ฒผ๋‹ค. MacOS์—์„œ JAVA HOME Path ์„ค์ •์„ ์ง„ํ–‰ํ•ด๋ณด๋ ค ํ•œ๋‹ค. ๋จผ์ €, MacOS ์—์„œ JDK ์„ค์น˜๊ฐ€ ์™„๋ฃŒ๋œ ์ƒํƒœ์—์„œ, java -version

2021๋…„ 6์›” 1์ผ
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[Java]Error, Exception(Checked, Unchecked)

Exception๊ณผ Error๋Š” ์ตœ์ƒ์œ„ Object๋ฅผ ์ƒ์†๋ฐ›๋Š” Throwable Class๋ฅผ ์ƒ์†๋ฐ›๋Š” Class ์ด๋‹ค. Checked Exception๊ณผ Unchecked Exception์— ๋Œ€ํ•ด ์„ค๋ช… ํ•˜๊ธฐ์ „ ์•Œ์•„์•ผ ํ•  ์‚ฌํ•ญ์€ Error์™€ Runtime Excepti

2021๋…„ 5์›” 25์ผ
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[Java] List ๊ตฌํ˜„ Class ์ค‘ ๊ฐ€์žฅ ๋น ๋ฅธ Class๋Š”??

List Interface๋ฅผ ๊ตฌํ˜„ํ•œ ArrayList, LinkedList, Vector Class ๋“ค์˜ ์„ฑ๋Šฅ ์ฐจ์ด๋ฅผ ๋น„๊ตํ•ด๋ณด๋ คํ•œ๋‹ค. Data ์ €์žฅ ์•„๋ž˜ JMH๋กœ ์ž‘์„ฑํ•œ ํ…Œ์ŠคํŠธ ์ฝ”๋“œ๋Š” ์„ธ ๊ฐ€์ง€ Calss์˜ Data ์ถ”๊ฐ€ ์„ฑ๋Šฅ ํ…Œ์ŠคํŠธ ์ฝ”๋“œ์ด๋‹ค.

2021๋…„ 5์›” 21์ผ
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[Java] Set ๊ตฌํ˜„ Class ์ค‘ ๊ฐ€์žฅ ๋น ๋ฅธ Class๋Š”??

์œ„ ํ…Œ์ŠคํŠธ ์ฝ”๋“œ๋Š” Set Interface๋ฅผ ๊ตฌํ˜„ํ•œ HashSet, TreeSet, LinkedHashSet์˜ Data ์ €์žฅ ๊ณผ์ •์˜ ์„ฑ๋Šฅ ์ฐจ์ด๋ฅผ ๋น„๊ตํ•ด๋ณด๊ธฐ ์œ„ํ•œ ์ฝ”๋“œ์ด๋‹ค. ์œ„ ํ…Œ์ŠคํŠธ์˜ ๊ฒฐ๊ณผ๋Š” ์•„๋ž˜์™€ ๊ฐ™๋‹ค.

2021๋…„ 5์›” 18์ผ
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[TransferObject] Collection, Map Interface

๋Œ€๋ถ€๋ถ„ ํ”„๋กœ์ ํŠธ์—์„œ Transfer Object๋ฅผ ๋งŽ์ด ์‚ฌ์šฉํ•˜๊ณ , ๊ทธ ๋‚ด๋ถ€์—์„œ Collection๊ณผ Map Interface๋ฅผ ์ƒ์†๋ฐ›๋Š” ๊ฐ์ฒด๊ฐ€ ๋งŽ์ด ์‚ฌ์šฉ๋œ๋‹ค. ๋ชฉ๋ก ๋ฐ์ดํ„ฐ๋ฅผ ๋‹ด๊ธฐ์— ๊ฐ€์žฅ ์ข‹์€๊ฒƒ์ด Array์ด๊ณ , ๊ทธ ๋‹ค์Œ์œผ๋กœ Collection ๊ด€๋ จ ๊ฐ์ฒด๋“ค์ด๊ธฐ ๋•Œ๋ฌธ์ด๋‹ค

2021๋…„ 5์›” 14์ผ
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String Class์™€ ์„ฑ๋Šฅ ์ด์Šˆ, String ์ œ๋Œ€๋กœ ์‚ฌ์šฉํ•˜๊ธฐ

String Class์™€ ์„ฑ๋Šฅ String Class๋Š” ๋ชจ๋“  ๊ฐœ๋ฐœ์ž๋“ค์ด ์•Œ๋ฉด์„œ๋„ ์ž˜ ์ง€ํ‚ค์ง€ ์•Š๋Š” Class์ค‘ ํ•˜๋‚˜์ด๋‹ค. ๋ฐ”๋กœ ์„ฑ๋Šฅ๊ณผ ๋ฐ€์ ‘ํ•˜๊ฒŒ ์˜ํ–ฅ์„ ๋ผ์น  ์ˆ˜ ์žˆ๋‹ค๋Š” ์‚ฌ์‹ค์„ ์•Œ๋ฉด์„œ๋„, ๊ทธ๊ฒƒ์— ๋Œ€ํ•ด ๊นŠ๊ฒŒ ์ƒ๊ฐํ•˜์ง€ ์•Š๋Š” ๊ฒƒ์ธ๋ฐ, String Class๋Š” ์ž˜ ์‚ฌ์šฉํ•˜๋ฉด ์ƒ๊ด€

2021๋…„ 5์›” 4์ผ
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Java ์„ฑ๋Šฅ ์‹œ๊ฐ„ ์ธก์ •

์ž‘์„ฑํ•œ ์ž์‹ ์˜ ๋ฉ”์†Œ๋“œ์˜ ์„ฑ๋Šฅ์„ ์ธก์ •ํ•˜๋Š” ๋ฐฉ๋ฒ•์—๋Š” ์—ฌ๋Ÿฌ๊ฐ€์ง€๊ฐ€ ์กด์žฌํ•œ๋‹ค. ์ด์ค‘ System Class์—์„œ ์ œ๊ณตํ•˜๋Š” static ์‹œ๊ฐ„ ์ธก์ • ๋ฉ”์†Œ๋“œ๋กœ ๋Œ€ํ‘œ์ ์ธ currentTimeMilis() ์™€ nanoTime() ๋ฉ”์†Œ๋“œ๊ฐ€ ์žˆ๋‹ค. static long currentTim

2021๋…„ 5์›” 3์ผ
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[Java] ์ œ์–ด๋ฌธ

Java์—์„œ Interpreter๋Š” ์œ„์—์„œ ์•„๋ž˜ ๋ฐฉํ–ฅ์œผ๋กœ, ์˜ค๋ฅธ์ชฝ์—์„œ ์™ผ์ชฝ์œผ๋กœ ํ”„๋กœ๊ทธ๋žจ์„ ๊ธฐ๊ณ„์–ด๋กœ ๋ฒˆ์—ญํ•ด ์ฝ์–ด ๋‚˜๊ฐ„๋‹ค.Interpreter๋Š” ๊ณ ๊ธ‰์–ธ์–ด๋กœ ์ž‘์„ฑ๋œ ํ”„๋กœ๊ทธ๋žจ์„ ํ•œ์ฆ์”ฉ ๋ฒˆ์—ญํ•ด์„œ OS์—์„œ ์ธ์‹ํ•˜๋Š” ๊ธฐ๊ณ„์–ด๋กœ ๋ฒˆ์—ญํ•˜๋Š” ์—ญํ•  ์ˆ˜ํ–‰Java Interpreter๋Š” JA

2020๋…„ 12์›” 7์ผ
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[Java] Interface vs Abstract Class ์ •๋ฆฌ

๐Ÿ™†โ€โ™‚๏ธ ์ฐธ๊ณ ์‚ฌ์ดํŠธ ๐Ÿ™‡โ€โ™‚๏ธ ์ž๋ฐ”์˜ ์ถ”์ƒ ํด๋ž˜์Šค์™€ ์ธํ„ฐํŽ˜์ด์Šค - ์ถ”์ƒ ํด๋ž˜์Šค์™€ ์ธํ„ฐํŽ˜์ด์Šค์˜ ์ฐจ์ด[by๊ฐ•๊ด€์šฐ] [JAVA] ์ถ”์ƒํด๋ž˜์Šค VS ์ธํ„ฐํŽ˜์ด์Šค ์™œ ์‚ฌ์šฉํ• ๊นŒ? ์ฐจ์ด์ , ์˜ˆ์ œ๋กœ ํ™•์ธ [๋งˆ์ด์ž๋ชฝ myJamong] ์ถ”์ƒํ™”ํด๋ž˜์Šค์™€ ์ธํ„ฐํŽ˜์ด์Šค์˜ ์šฉ๋„, ์ฐจ์ด์ , ๊ณต

2020๋…„ 11์›” 29์ผ
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[Java] Abstract Class(์ถ”์ƒ ํด๋ž˜์Šค)

Abstract Class๋ž€ ๊ตฌ์ฒด์ ์ด์ง€ ์•Š์€ Class๋ฅผ ์˜๋ฏธํ•œ๋‹ค. EX ๋…์ˆ˜๋ฆฌ, ํƒ€์กฐ๋Š” ๊ตฌ์ฒด์ ์ธ ์ƒˆ๋ฅผ ์ง€์นญํ•˜๋Š”๋ฐ ์ƒˆ, ํฌ์œ ๋ฅ˜ ๊ฐ™์€ ๊ฒƒ์€ ๊ตฌ์ฒด์ ์ด์ง€ ์•Š๋‹ค.์ฃผ๋กœ ํด๋ž˜์Šค๋“ค์˜ ๊ณตํ†ต๋˜๋Š” ํ•„๋“œ์™€ ๋ฉ”์†Œ๋“œ๋ฅผ ์ •์˜ํ•œ ํด๋ž˜์Šค๋ฅผ ๋งํ•œ๋‹ค.์ด๋Ÿฐ ๊ฒƒ์„ ๊ตฌํ˜„ํ•œ ํด๋ž˜์Šค๋ฅผ Abstract Clas

2020๋…„ 11์›” 28์ผ
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[Java] Interface

Interface๋Š” ๋™์ผํ•œ ๋ชฉ์  ํ•˜์— ๋™์ผํ•œ ๊ธฐ๋Šฅ์„ ์ˆ˜ํ–‰ํ•˜๊ฒŒ๋” ๊ฐ•์ œํ•˜๋Š” ๊ฒƒ์ด ๋ฐ”๋กœ Interface์˜ ์—ญํ• ์ด์ž ๊ฐœ๋…์ด๋‹ค. Interface๋Š” interface ํ‚ค์›Œ๋“œ๋ฅผ ํ†ตํ•ด ์„ ์–ธํ•  ์ˆ˜ ์žˆ์œผ๋ฉฐ implements ํ‚ค์›Œ๋“œ๋ฅผ ํ†ตํ•ด ์ผ๋ฐ˜ Class์—์„œ Interface๋ฅผ ๊ตฌํ˜„

2020๋…„ 11์›” 26์ผ
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[Algorithm] ์žฌ๊ท€์™€ ๋ฐ˜๋ณต๋ฌธ

Algorithm ๋ฌธ์ œ๋ฅผ ํ’€๋•Œ ๋ณดํ†ต while์ด๋‚˜ for๋ฌธ ๊ฐ™์€ ๋ฐ˜๋ณต๋ฌธ์„ ์ด์šฉํ•ด ๋ฌธ์ œ๋ฅผ ํ’€๊ณค ํ–ˆ๋‹ค.ํ•˜์ง€๋งŒ ๋ฐ˜๋ณต๋ฌธ ๋งŒ์œผ๋กœ๋Š” ํ’€๊ธฐ ์–ด๋ ค์šด ๋ฌธ์ œ๋“ค์ด๋‚˜, ์žฌ๊ท€ ํ•จ์ˆ˜๋กœ ํ‘ธ๋Š” ๊ฒƒ์ด ๋” ๋น ๋ฅด๊ฒŒ ์ ‘๊ทผ ๊ฐ€๋Šฅํ•œ ๋ฌธ์ œ๋“ค์˜ ๊ฒฝ์šฐ(DFS, DP, Combination ๋“ฑ) ์žฌ๊ท€ ํ•จ์ˆ˜๋ฅผ ์‚ฌ์šฉํ•˜

2020๋…„ 11์›” 18์ผ
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