Explore GraalVM
GraalVM Faster. Smarter. Leaner. GraalVM is a high performance JDK that speeds up the performance of Java and JVM-based applications and simplifies the building and running of Java cloud native services. The optimized compiler generates faster code and uses fewer compute resources, enabling microservices to start instantly. GraalVM is included with the Java SE Universal Subscription at no addition
「解剖 Kotlin ~ãƒã‚¤ãƒˆã‚³ãƒ¼ãƒ‰ã‚’èªã¿è§£ã~ã€ã‚’GitBookã§å…¬é–‹ã—ã¾ã—ãŸã€‚ - visible true
テクブã®å¤ã‚³ãƒŸ(C90)ã®ã‚¢ãƒ³ãƒ‰ãƒã‚¤ãƒ‰ã‚¢ã‚«ãƒ‡ãƒŸã‚¢ã«æ›¸ã„ãŸè§£å‰– Kotlin ~ãƒã‚¤ãƒˆã‚³ãƒ¼ãƒ‰ã‚’èªã¿è§£ã~ã‚’GitBookã«ã¦å…¬é–‹ã—ã¾ã—ãŸã€‚ GitBook ã“ã¡ã‚‰ã‹ã‚‰èªã‚ã¾ã™ 解剖 Kotlin ~ãƒã‚¤ãƒˆã‚³ãƒ¼ãƒ‰ã‚’èªã¿è§£ã~ æ¦‚è¦ è§£å‰– Kotlin ~ãƒã‚¤ãƒˆã‚³ãƒ¼ãƒ‰ã‚’èªã¿è§£ã~ã¯Kotlinã§æ›¸ã„ãŸãƒ—ãƒã‚°ãƒ©ãƒ を逆アセンブルã™ã‚‹ã“ã¨ã§ã€KotlinãŒæä¾›ã—ã¦ã„る特徴的ãªæ©Ÿèƒ½ãŒJavaã§ã©ã®ã‚ˆã†ã«è¡¨ç¾ã•ã‚Œã¦ã„ã‚‹ã‹ã‚’èªã¿è§£ã„ã¦ã„ãã¾ã™ã€‚Kotlinã®ç‰¹å¾´çš„ãªæ©Ÿèƒ½ãŸã¡ã‚‚Javaã«ãªã£ã¦ã—ã¾ãˆã°ã“ã£ã¡ã®ã‚‚ã®ã€‚ãªãƒ¼ã‚“ã Kotlinã‚‚Javaãªã‚“ã ã。 目次 Introduction Kotlinã¨Java 本書ã®ã‚¢ãƒ—ãƒãƒ¼ãƒ 1. null許容型ã®æ£ä½“ 2. 関数型ã¨ãƒ©ãƒ ダå¼ã®æ£ä½“ 3. インライン関数ã®æ£ä½“ 4. 拡張関数ã®æ£ä½“ 5. プãƒãƒ‘ティã®æ£ä½“ 6. デリゲートプãƒãƒ‘ティã®æ£ä½“ 7. 末尾å†å¸°æœ€é©
hotspot ã® NullPointerException 時ã®è¡¨ç¤ºã‚’ã‚ã‹ã‚Šã‚„ã™ãã§ããªã„ã‹ãªã‚ã¨æ€ã£ã¦èª¿ã¹ãŸã‘ã©æŒ«æŠ˜ã—㟠- tokuhirom's blog
解決ã—ãŸã„ã“㨠foo.bar(baz.boz()); ã¿ãŸã„ãªã‚±ãƒ¼ã‚¹ã§ã€NPE ãŒç™ºç”Ÿã—ãŸå ´åˆã«ã€foo ㌠null ã§ä¾‹å¤–発生ã—ãŸã®ã‹ baz ㌠null ã§ä¾‹å¤–発生ã—ãŸã®ã‹ã‚ã‹ã‚‰ã‚“ ã‚„ã£ã¦ã¿ã‚‹ bash configure --with-native-debug-symbols=internal --enable-headless-only --with-debug-level=slowdebug --disable-warnings-as-errors make å‹•ã‹ã—ã¦ã¿ã‚‹ã¨ä»¥ä¸‹ã®ã‚ˆã†ãªå‡ºåŠ›ã‚’得られる。 Exception in thread "main" java.lang.NullPointerException at NPE.main(NPE.java:4) ã“ã‚Œã¯ä»¥ä¸‹ã®ã‚½ãƒ¼ã‚¹ã‹ã‚‰å‡ºåŠ›ã•ã‚Œã¦ã„る。Thread å˜ä½ã§ uncaught exception ãŒç™ºç”Ÿã•ã›ã‚‰ã‚Œ
Javassist by jboss-javassist
Javassist Java bytecode engineering toolkit since 1999 View on GitHub Download .zip Download .tar.gz Javassist (Java Programming Assistant) makes Java bytecode manipulation simple. It is a class library for editing bytecodes in Java; it enables Java programs to define a new class at runtime and to modify a class file when the JVM loads it. Unlike other similar bytecode editors, Javassist provides
Setting environment variables in Java
Details of what I'm wasting my time on at the moment, in particular what homebrew game or console project I'm working on. Have you ever noticed that the Java System class doesn't let you set environment variables? You can retrieve them using getenv() but there is no equivalent setenv() function. First off, what is the environment? The manual entry for environ(7) describes the environment as: an ar
mrubyã‚„KopiLuaã«ã¯ãªãœæ–‡å—連çµç”¨ã‚ªãƒšã‚³ãƒ¼ãƒ‰ãŒã‚ã‚‹ã®? â‘ (ã‚ã‚‹ã„ã¯Javaã®æ–‡å—連çµæœ€é©åŒ–ã«ã¤ã„ã¦) - ã»ã’ã»ã’ã«ã‚ƒ
å‰ç½®ã 最近色々ã‚ã‚Šã¾ã—ã¦mrubyã‚„KopiLua(C#ã«ã‚ˆã‚‹Lua実装)ã®ã‚½ãƒ¼ã‚¹ã‚³ãƒ¼ãƒ‰ã‚’èªã‚“ã ã‚Šã—ã¦ãŠã‚Šã¾ã™ã€‚ ã¡ã‚‡ã†ã©VM部分をèªã‚“ã§ã„ãŸã‚‰ã€é¢ç™½ã„部分を見ã¤ã‘ã¾ã—ãŸã€‚ mrubyã®ãƒã‚¤ãƒˆã‚³ãƒ¼ãƒ‰ã«OP_STRCAT(æ–‡å—連çµ)ã£ã¦ã„ã†ã®ãŒã‚ã‚‹ã®ã«é©šã„ã¦ãŸã‘ã©, LuaVMèªã‚“ã§ãŸã‚‰OP_CONCATã¨ã‹ã‚ã£ãŸã—æ–‡å—連çµç³»ã®ã‚ªãƒšã‚³ãƒ¼ãƒ‰ç”¨æ„ã™ã‚‹ã®ã£ã¦æ™®é€šãªã‚“ã§ã™â€¦?— ã©ã¿ã¨ã‚Š (@domitry) 2013, 12月 5 ã“ã‚Œã¾ã§x86ã®ã‚¢ã‚»ãƒ³ãƒ–ラã—ã‹èªã‚“ã ã“ã¨ãŒãªã‹ã£ãŸã®ã§ç‰¹æ®Šã‹ã©ã†ã‹ã‚ˆãã‚ã‹ã‚‰ãªã„… ãã“ã§ãµã¨LL言語ã§ãªã„, 例ãˆã°Javaã®VMã¯ã©ã†ãªã£ã¦ã‚‹ã‚“ã ã‚ã†ãªãƒ¼ã¨æ€ã„調ã¹ã¦ã¿ã¾ã—ãŸã€‚ 昨日ã®ãŠè©±ã€Javaã®ãƒã‚¤ãƒˆã‚³ãƒ¼ãƒ‰ã‚’見ã¦ã¿ãŸã‚‰strcatやらconcatã¯ãªã‹ã£ãŸâ€¦ ã‚ャストã¨ã‹ã‚ªãƒ–ジェクト指å‘ãªè¦ç´ (newã¨ã‹class method呼ã³å‡ºã—ã¨ã‹)ã¨ã‹ã¯å«ã¾ã‚Œã¦ãŸ
VMKit: a substrate for virtual machines
You can still play with the last VMKit release, but the project is not more maintained. Moreover, the information on these pages may be out of date. If you are interested in restarting the project, please contact Gaël Thomas Current MREs are monolithic. Extending them to propose new features or reusing them to execute new languages is difficult. VMKit is a library that eases the development of new
Scalaã®valã¨varã¨def - Pixel Pedals of Tomakomai
valã¯å®šæ•°ã€varã¯å¤‰æ•°ã€defã¯ã‚³ãƒ¼ãƒ‰ã€ã¨ã„ã†ã®ãŒå¤§ã¾ã‹ãªç†è§£ã«ãªã‚‹ã€‚ã“れらã¯åå‰ç©ºé–“を共有ã—ã¦ã„ã‚‹ã®ã§ã€å®šæ•°ã€å¤‰æ•°ã€ã‚³ãƒ¼ãƒ‰ã«åŒã˜åå‰ã‚’ã¤ã‘ã‚‹ã“ã¨ã¯ã§ããªã„。ãŸã ã—ã€JSã‚„Pythonã®ã‚ˆã†ã«å˜ç´”ã«ãƒ•ã‚£ãƒ¼ãƒ«ãƒ‰ã«ãƒ¡ã‚½ãƒƒãƒ‰ã‚ªãƒ–ジェクトãŒå…¥ã£ã¦ã„ã‚‹ã¨æ€ã†ã¨ãƒãƒžã‚‹éƒ¨åˆ†ãŒã‚ã‚‹ã®ã§ã€ãã®è¾ºã‚’å«ã‚ã¦èª¿ã¹ãŸã“ã¨ã‚’メモ。(ãªãŠã€ã“ã®ã‚¨ãƒ³ãƒˆãƒªã¯ 2.9.1.final ã§ã®æŒ™å‹•ã«ã¤ã„ã¦æ›¸ã„ã¦ã„る。) クラス定義ã®varã€defã€val ã¯ãƒ¡ã‚½ãƒƒãƒ‰ valã¨varã¯final付ãã€finalç„¡ã—ã®å¤‰æ•°ã¨ã—ã¦è§£é‡ˆã•ã‚Œã‚‹ã¨æ€ã‚れるãŒã€ã‚¯ãƒ©ã‚¹ã®ãƒ•ã‚£ãƒ¼ãƒ«ãƒ‰ã¨ã—ã¦å®šç¾©ã—ãŸå ´åˆã«ã¯JVM上ã§ã¯ãƒ¡ã‚½ãƒƒãƒ‰çµŒç”±ã§ã‚¢ã‚¯ã‚»ã‚¹ã™ã‚‹ã“ã¨ã«ãªã‚‹ã€‚ã®ã§ã€abstract defã‚’varã‚„valã§ã‚ªãƒ¼ãƒãƒ¼ãƒ©ã‚¤ãƒ‰*1ã—ãŸã‚Šã§ãる。 class ValVarDef { val x = 1 var y = 2 def z = 3 } % jav
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Javaã®hello worldã®èªã¿æ–¹ | mwSoft
å‰æ›¸ã ãŠé¦´æŸ“ã¿ã€hello worldã®ã‚½ãƒ¼ã‚¹ã€‚ class Hello { public static void main(String[] args) { System.out.println("hello world"); } } ã“ã®ã‚³ãƒ¼ãƒ‰ã¯ã‚³ãƒ³ãƒ‘イルã•ã‚Œã‚‹ã¨ã€ã“ã‚“ãªãƒã‚¤ãƒˆã‚³ãƒ¼ãƒ‰ã«ãªã‚Šã¾ã™ã€‚ ca fe ba be 00 00 00 32 00 22 07 00 02 01 00 05 48 65 6c 6c 6f 07 00 04 01 00 10 6a 61 76 61 2f 6c 61 6e 67 2f 4f 62 6a 65 63 74 01 00 06 3c 69 6e 69 74 3e 01 00 03 28 29 56 01 00 04 43 6f 64 65 0a 00 03 00 09 0c 00 05 00 06 01 00 0f 4c 69 6e 65 4e
å¦æ ¡ã§ã¯æ•™ãˆã¦ãã‚Œãªã„ System.out.println() - 郡山ã‹ã‚‰Hello World
実際ã«å¦æ ¡ã§æ•™ãˆã¦ãれるã‹ã¯åˆ¥ã¨ã—㦠System.out.println()ã«ã¤ã„ã¦è€ƒãˆã¦ã¿ã‚ˆã†ã€‚System.out.println()ã¯ã€Javaを勉強ã—よã†ã¨ã™ã‚‹äººãŒåˆæœŸã®æ®µéšŽã‹ã‚‰åˆ©ç”¨ã™ã‚‹ãƒ¡ã‚½ãƒƒãƒ‰ã§ã‚る。ãŒã€ã—ã‹ã—ã€å®Ÿã¯è¬Žã らã‘ãªã®ã§ã‚る。 ã¾ãšã¯ã€System.out.println()を分解ã—ã¦è€ƒãˆã¦ã¿ã‚‹ã€‚ Systemã¯java.lang.Systemã§ã‚る。 outã¯java.lang.Systemã®ãƒ•ã‚£ãƒ¼ãƒ«ãƒ‰ã§ã‚る。 Systemクラスã®javadocを眺ã‚ã‚‹ã¨ã€outã®åž‹ã¯PrintStreamã§ã‚ã‚‹ã“ã¨ãŒã‚ã‹ã‚‹ã€‚ PrintStreamã®javadocを眺ã‚ã‚‹ã¨ã€printlnメソッドãŒå˜åœ¨ã™ã‚‹ã€‚ ã¤ã¾ã‚Šã€System.outã«PrintStreamã®ã‚ªãƒ–ジェクトãŒä»£å…¥ã•ã‚Œã¦ã„ã¦ã€ãã®ã‚ªãƒ–ジェクトã®printlnメソッドを呼んã§ã„ã‚‹ã ã‘ã§ã‚‹ã€‚ã“ã®ãƒ¡ã‚½ãƒƒãƒ‰ã‚’実行ã™ã‚‹ã“ã¨
Javaãƒã‚¤ãƒˆã‚³ãƒ¼ãƒ‰ã®èªã¿æ–¹ - プãƒã‚°ãƒ©ãƒžãƒ¼ã®è„³ã¿ã
Javaã®ãƒ‡ãƒãƒƒã‚°ã‚’ã—ã¦ã„ã¦ã€ã‚¹ãƒ†ãƒƒãƒ—実行ä¸ã«ã‚¹ãƒ†ãƒƒãƒ—インを繰り返ã—ãŸã‚‰ã‚½ãƒ¼ã‚¹ã‚³ãƒ¼ãƒ‰ã®ãªã„ã¨ã“ã‚ã«è¡Œã当ãŸã£ãŸã“ã¨ãŒã‚ã‚‹ã ã‚ã†ã€‚ã‚ã‚‹ã„ã¯Eclipseã§F3ã‚ーã§ã‚¯ãƒ©ã‚¹ã‚„メソッド・フィールドã®å®£è¨€å…ƒã‚’辿ã£ã¦ã„ã£ã¦ã‚½ãƒ¼ã‚¹ã‚³ãƒ¼ãƒ‰ã®ãªã„ã¨ã“ã‚ã«è¡Œã当ãŸã£ãŸã“ã¨ãŒã‚ã‚‹ã ã‚ã†ã€‚ Eclipseã®å ´åˆã€"Class File Editor"ã¨ã„ã†ã‚‚ã®ãŒé–‹ã。ãã“ã«ã¯Javaã®ãƒã‚¤ãƒˆã‚³ãƒ¼ãƒ‰ã®ãƒ‹ãƒ¼ãƒ¢ãƒ‹ãƒƒã‚¯ãŒã‚ºãƒ©ã‚ºãƒ©ã¨ä¸¦ã‚“ã§ã„ã¦ã€ã€Œã“ã‚Œã¯èªã‚ãªã„ã‚„ã€ãƒ¯ã‚±ãŒåˆ†ã‹ã‚‰ãªã„ã€ã¨æŠ•ã’出ã—ã¦ã—ã¾ã£ãŸã‚Šã—ã¦ã„ãªã„ã ã‚ã†ã‹ã€‚ 怖ãŒã‚‹ã“ã¨ã¯ãªã„。ã¡ã‚‡ã£ã¨ã‚³ãƒ„を掴ã‚ã°ã™ãã«èªã‚るよã†ã«ãªã‚‹ã€‚ Class File Editorã®é–‹ãæ–¹ 自å‰ã®Javaクラスã®å ´åˆã€ãƒ“ルドã—ã¦å‡ºæ¥ä¸ŠãŒã£ãŸclassファイルを開ãå¿…è¦ãŒã‚る。"Package Explorer"ã ã¨classファイルã¯éš ã•ã‚Œã¦ã„ã¦è¦‹ãˆãªã„ã®ã§Window -> Sh
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GitHub - graalvm/sulong: Obsolete repository. Moved to oracle/graal.
Atlassian — DEV Community Profile
Running Java bytecode on the Android - Sun JVM on top of DalvikVM
http://int3.github.com/doppio/
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