목록분류 전체보기 (120)

woonizzooni

[Ecplise] tab대신 space 사용하기

Preferences > General > Editor > Text Editors : insert spaces for tabs Preferences > Java > Code Style > Formatter : 추가 & Tab policy를 'Spaces only' 선택 Preferences > C/C++ > Code Style > ... 동일 .... 이후 패키지 or 소스 선택 후 우클릭 > source > format 수행 [참고] https://stackoverflow.com/questions/22213098/replace-spaces-with-tabs-using-eclipse
MISC 2019. 6. 13. 15:50
IPv4 네트워크 접두어 길이 구하기 = CIDR Prefix Length 구하기

CIDR (Classless Inter-Domain Routing) https://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing IPv4 CIDR blocks subnetmask입력시 prefix legnth를 구해본다. (CIDR계산 방법 이해 전제하에 작성함) ex) subnetmask가 - "255.255.255.0"이면 24반환 - "299.255.255.0"이면 throws UnknownHostException - "255.255.241.0"이면 -1반환 (비정상 subnetmask) public int convertNetmaskToPfxLength(String subnetmask) throws UnknownHostException { InetAd..
Programming/Java 2019. 6. 13. 15:40
무료 포럼 서비스

오래 전에 phpbb, vBulletin를 설치해서 사용해본 경험이 있는데 (와...늙었네...) 무료로 포럼 서비스 호스팅해주는 서비스가 있네. 필요할때 써보자. https://www.nabble.com/ Nabble • Free Forum • Embeddable Web Apps Embed into any Website All Nabble apps are naturally embeddable, which means that they can be easily displayed inside any web page. www.nabble.com
MISC 2019. 6. 13. 05:46
java tip : 파일을 가장 빨리 읽는 방법 / 효과적인 방법

파일 크기, 단일 파일/복수개 파일 등 조건별 차이가 있겠지만, 다음과 같은 검색어 결과로 여러 개발자/경험자들의 검토 의견을 참고해보자 "What is the fastest way to read a large file in Java" "How to Read a Large File Efficiently with Java" "How to read files quickly with java" 몇 가지만 적어두자.. 2008/02/24 How to read files quickly http://nadeausoftware.com/articles/2008/02/java_tip_how_read_files_quickly Conclusions For the best Java read performance, there ..
Programming/Java 2019. 6. 13. 05:37
Java 버전별 내용 참고

심심할때 열어보자... Java Spec.Java Language and Virtual Machine Specifications https://docs.oracle.com/javase/specs/ Java SE Specifications Java Language and Virtual Machine Specifications Java SE 12 Released March 2019 as JSR 386 The Java Language Specification, Java SE 12 Edition HTML | PDF The Java Virtual Machine Specification, Java SE 12 Edition HTML | PDF Java SE 11 Released September 20 docs.ora..
Programming/Java 2019. 6. 13. 05:27
TFO (TCP Fast Open)

TCP Fast Open https://tools.ietf.org/html/rfc7413 2017/02/02 Enabling TCP Fast Open for NGINX on CentOS 7 - What is TCP Fast Open? https://designhost.gr/topic/799-enabling-tcp-fast-open-for-nginx-on-centos-7/ Enabling TCP Fast Open for NGINX on CentOS 7 What is TCP Fast Open? The TCP protocol underpins most application-layer protocols like HTTP, SSH, FTP, NFS, etc. In fact TCP sits in between th..
Standard/TCP 2019. 6. 13. 05:20
QUIC, HTTP/3 근황

QUIC (Quick UDP Internet Connections) : A UDP-Based Multiplexed and Secure Transport QUIC is an IETF Working Group that is chartered to deliver the next transport protocol for the Internet. https://quicwg.org/ https://github.com/quicwg/base-drafts .... experimental implementations in progress. https://github.com/quicwg/base-drafts/wiki/Implementations IETF QUIC The following stacks implement the..
Standard/HTTP3(QUIC) 2019. 6. 13. 05:13
SPDY, HTTP/2 근황

RFC7540 https://datatracker.ietf.org/doc/rfc7540/ HTTP/2 소개 https://developers.google.com/web/fundamentals/performance/http2/?hl=ko HTTP/2 지원 브라우저 버전 목록 https://caniuse.com/#feat=http2 이번에는 오픈소스SW 서버 목록 Nginx 2019/05/22 HTTP/2 성능 향상을 위한 NGINX 구조 개선 https://blog.cloudflare.com/nginx-structural-enhancements-for-http-2-performance/ https://blog.cloudflare.com/nginx-structural-enhancements-for-http-..
Standard/HTTP2 2019. 6. 13. 05:04
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