1. Java ã©ã€ãã©ãªã®åºæ¬ç¥è
Javaã®çµã¿èŸŒã¿æ©èœã匷åããããã«çšãããããJava ã©ã€ãã©ãªãã«ã€ããŠæãäžããŠãããŸãããããã®åºæ¬ããäºææ§ã®åé¡ãŸã§ãå¹ åºãç¶²çŸ ããŸãã
1.1 Java ã©ã€ãã©ãªãšã¯
Java ã©ã€ãã©ãªã¯åå©çšå¯èœãªããã°ã©ã ã³ãŒãã®éåå°ã§ãããJavaã®éçºãé«éåããå¹çåããããã«äœ¿çšãããŸããã©ã€ãã©ãªã¯äžè¬çãªããã°ã©ã ã¿ã¹ã¯ãæœè±¡åããéçºè ãå床ã³ãŒãã£ã³ã°ããå¿ èŠæ§ãæé€ããŸããèšãæãããšãJavaã©ã€ãã©ãªã¯ãã§ã«ååšããããã°ã©ã ã³ãŒããšããŠãããã°ã©ãã³ã°ã®ããã©ãŒãã³ã¹ãåäžãããŸãã
Javaã®æšæºã©ã€ãã©ãªã¯JavaããããããŒã®å¿ éåã§ãããããã«å ããŠå€ãã®ãµãŒãããŒãã£Javaã©ã€ãã©ãªãååšããŸãããããã¯ç¹å®ã®åé¡ã解決ããããã«ç¹åããŠèšèšãããŠãããJavaã®ãã¯ãã«ãªãšã³ã·ã¹ãã ã圢æããŠããŸãã
Javaã©ã€ãã©ãªã¯ãJavaã¯ã©ã¹ãšã€ã³ã¿ãŒãã§ãŒã¹ããæ§æãããŸãããããã¯äžé£ã®ã¡ãœãããæäŸãããããã¯ç¹å®ã®ã¿ã¹ã¯ãå®è¡ããããã®ã³ãã³ããšããŠåããŸãã
1.2 Java ã©ã€ãã©ãªã®éèŠæ§
Java ã©ã€ãã©ãªã¯ãJavaã®ãœãããŠã§ã¢éçºã«ãããå¹çãšé床ã®å€§å¹ ãªåäžãå®çŸããŸããããã¯æ¢åã®ã³ãŒããåå©çšããããã°ã©ã ã®ä¿¡é Œæ§ãšäžè²«æ§ãä¿èšŒããŸãã
Javaã©ã€ãã©ãªã¯ãã³ãŒãéãå€§å¹ ã«åæžããããšã§éçºæéãççž®ããŸããéçºè ãæ¢åã®è§£æ±ºçãåå©çšããããšã§ã圌ãã¯è¿ éã«ãããã¿ã€ããäœæããã¢ããªã±ãŒã·ã§ã³ãé«éåã§ããŸãã
ãŸããJava ã©ã€ãã©ãªãå©çšããããšã§ãè€éãªã¿ã¹ã¯ã®åŠçãå¯èœã«ãªããã³ãŒãã®ä¿¡é Œæ§ãšä¿å®æ§ãåäžããŸããããã¯ãJava ã©ã€ãã©ãªãè±å¯ãªæ©èœãšãã¹ãæžã¿ã®ã³ãŒããæäŸããããã§ãã
1.3 Java ã©ã€ãã©ãªã®çš®é¡
Java ã©ã€ãã©ãªã®çš®é¡ã¯åºç¯ã§ã以äžã®ã©ã€ãã©ãªã¯ããããç¹å®ã®é åã§ãã䜿çšãããŠããŸãïŒ JUnitã¯ãŠããããã¹ãã®ããã«ãLog4jã¯ãã®ã³ã°ã®ããã«ãJAXBã¯XMLãã€ã³ãã£ã³ã°ã®ããã«ãJPAã¯ããŒã¿ããŒã¹ã¢ã¯ã»ã¹ã®ããã«ãçã 䜿çšãããŸãã
Java ã°ã©ãã£ãã¯ã©ã€ãã©ãª, ãããã¯ãŒã¯ã©ã€ãã©ãª, ããŒã¿ããŒã¹ã©ã€ãã©ãªãªã©æ§ã ãªçš®é¡ã®Java ã©ã€ãã©ãªãããããã®ã¯ã©ã¹ãšã¡ãœããã§ç¹å®ã®æ©èœãæäŸããŸãã
ãããã®ã©ã€ãã©ãªãé©åã«å©çšããããšã§ãéçºè ã¯æ¢åã®ã³ãŒããåå©çšããããè¿ éã«ããã€å¹ççã«ããã°ã©ã ãéçºããããšãã§ããŸãã
1.4 Java ã©ã€ãã©ãªã®äºææ§
å šãŠã®Javaã©ã€ãã©ãªããã¹ãŠã®JavaããŒãžã§ã³ã§åäœããããã§ã¯ãããŸãããããããã®Javaã©ã€ãã©ãªã¯ç¹å®ã®JavaããŒãžã§ã³ãšäºææ§ãæã£ãŠããŸãããããã£ãŠãæ°ããããŒãžã§ã³ã®Javaã§å©çšãããã©ã€ãã©ãªã¯ãæŽæ°ãããã¢ããã°ã¬ãŒããããŸãã
ãã®ãããJava ã©ã€ãã©ãªã䜿çšããéã«ã¯ãé©åãªJavaããŒãžã§ã³ãšã©ã€ãã©ãªãäºææ§ãæã€ããšã確èªããå¿ èŠããããŸããããããªããšãæåŸ ããçµæãåŸãããªãå¯èœæ§ããããŸãã
Javaã©ã€ãã©ãªã®äºææ§ã¯ãã¢ããªã±ãŒã·ã§ã³ãæå³ããéãã«åäœããããã«éèŠã§ããããã«ãããšã©ãŒãé²ãããšãå¯èœãšãªããã¢ããªã±ãŒã·ã§ã³éçºã®å¹çæ§ãšæåçãåäžããŸãã
2. Java ã©ã€ãã©ãªã®å©çšæ¹æ³
Javaã©ã€ãã©ãªã®å©çšã«ããããéžæããã€ã³ã¹ããŒã«ãæŽæ°ã»ç®¡çããã©ãã«ã·ã¥ãŒãã£ã³ã°ãŸã§ãé ãè¿œã£ãŠè§£èª¬ããŸããã©ã€ãã©ãªã®é©åãªäœ¿çšã¯ãœãããŠã§ã¢éçºã®å¹çãšå質ãå€§å¹ ã«åäžããããããéèŠãªç¥èãšãªããŸãã
ãã®ç« ã¯Javaã©ã€ãã©ãªã®å©çšãããã¹ã ãŒãºã«ããæ¹æ³ã«çŠç¹ãåœãŠãŠããŸããå ·äœçãªæé ãšå ±ã«èª¬æããèªè ãäœããã¹ãããæ確åããããšãç®æããŸãã
ããã§ã¯å ·äœçã«èŠãŠãããŸãããã
2.1 ã©ã€ãã©ãªã®éžææ¹æ³
ã©ã€ãã©ãªã®éžæã¯ãå®è£ ãããæ©èœãæ§èœèŠæ±ã«åºã¥ããã®ã§ããé©åãªã©ã€ãã©ãªãéžæããããšã§ãéçºæéã®ççž®ãã³ãŒãå質ã®åäžãªã©ã®å©ç¹ãåŸãããŸãã
å ¬åŒããã¥ã¡ã³ããŒã·ã§ã³ããŠãŒã¶è©äŸ¡ããã§ãã¯ããããšã¯ãè¯ãã©ã€ãã©ãªãèŠã€ããããã®éèŠãªã¹ãããã§ãããããã¯ã©ã€ãã©ãªã®ç¹æ§ã䜿çšæ¹æ³ãç解ããã®ã«åœ¹ç«ã¡ãŸãã
ãŸããéçºã³ãã¥ããã£ã掻çºãªã©ã€ãã©ãªã¯ãµããŒããæåããåé¡ãçºçããå Žåã«è¿ éã«å¯Ÿå¿å¯èœã§ãã
2.2 ã©ã€ãã©ãªã®ã€ã³ã¹ããŒã«æ¹æ³
Javaã©ã€ãã©ãªã®ã€ã³ã¹ããŒã«ã¯ãŸãã察象ã®ã©ã€ãã©ãªã®ããŠã³ããŒãããå§ãŸããŸãã次ã«ããã«ããã¹ã«ã©ã€ãã©ãªãè¿œå ããŸãããããæ£ããèšå®ãããŠããããšã¯ãã©ã€ãã©ãªãæ£åžžã«åäœãããããã«äžå¯æ¬ ã§ãã
ããã«ãã©ã€ãã©ãªãäŸåããä»ã®ã©ã€ãã©ãªãããå Žåãããããäžç·ã«ã€ã³ã¹ããŒã«ããå¿ èŠããããŸãããããã®äŸåé¢ä¿ã¯éåžžãã©ã€ãã©ãªã®ããã¥ã¡ã³ããŒã·ã§ã³ã«èšèŒãããŠããŸãã
æåŸã«ãã€ã³ã¹ããŒã«ããã©ã€ãã©ãªãããã°ã©ã ããå©çšã§ããããã«ããŸããéåžžã¯importæã䜿çšããŠã©ã€ãã©ãªãåç §ããŸãã
2.3 ã©ã€ãã©ãªã®æŽæ°ãšç®¡ç
Javaã©ã€ãã©ãªã®æŽæ°ãšç®¡çã¯ããããžã§ã¯ãã®æç¶çãªæåã«å¿ èŠãªäœæ¥ã§ããã©ã€ãã©ãªã®æŽæ°ã¯ãæ°æ©èœã®å©çšããã°ä¿®æ£ãã»ãã¥ãªãã£é¢ã®æ¹åãªã©ã®ã¡ãªããããããŸãã
ã©ã€ãã©ãªã®æŽæ°ã¯ããŸãããŒãžã§ã³æ å ±ã®èª¿æ»ããå§ããŸãããããããæ°ããããŒãžã§ã³ã«é©åã«å¯Ÿå¿ããããã®æ¹ä¿®ãè¡ããæåŸã«æ°ããŒãžã§ã³ã®ã©ã€ãã©ãªãã€ã³ã¹ããŒã«ããŸãã
ãŸãã䜿ããªããªã£ãã©ã€ãã©ãªã¯åé€ãããªã©ãã©ã€ãã©ãªå šäœã®ç¶æ ã管çããããšãéèŠã§ããããã«ããããããžã§ã¯ãã®è€éããé©åã«å¶åŸ¡ããããšãã§ããŸãã
2.4 ã©ã€ãã©ãªã®ãšã©ãŒæ¢ããšãã©ãã«ã·ã¥ãŒãã£ã³ã°
Javaã©ã€ãã©ãªã䜿çšããéã«ãšã©ãŒãçºçããããšã¯çãããããŸããããã®è§£æ±ºã®ããã®ãã©ãã«ã·ã¥ãŒãã£ã³ã°ã¹ãã«ã¯ãå¿ é ãšãªããŸãã
ãŸãããšã©ãŒã¡ãã»ãŒãžãç解ããããšãéèŠã§ããããã«ãããåé¡ãäœã§ããããææ¡ããããšãã§ããŸãããŸãããšã©ãŒãçºçããç®æã®ã³ãŒããæž æžãããšã©ãŒãåçŸããããšãæå¹ãªææ³ã§ãã
ãããŠããšã©ãŒã解決ããªãå Žåãã©ã®ããã«å¯Ÿçãã¹ããåãããªãå Žåã¯ãéçºã³ãã¥ããã£ãå°é家ã«ãã«ããæ±ããããšãæšå¥šãããŸãã
3. 人æ°Java ã©ã€ãã©ãªã®çŽ¹ä»
Javaã®äžçã«ã¯æ°ããããªãã»ã©ã®ã©ã€ãã©ãªãååšããŸãããããã¯éçºè ã®äœæ¥ã容æã«ããã³ãŒãã®å質ãé«ãã圹å²ãæãããŠããŸããããã§ã¯ãç¹ã«äººæ°ã®ãã4ã€ã®Java ã©ã€ãã©ãªã«ã€ããŠçŽ¹ä»ããŸãã
3.1 Spring Boot
Spring Bootã¯ãSpringãã¬ãŒã ã¯ãŒã¯ã䜿çšããŠJavaã¢ããªã±ãŒã·ã§ã³ãçŽ æ©ãç°¡åã«äœæããããã®ã©ã€ãã©ãªã§ããSpring Bootã®äž»ãªé åã¯ããã®ç°¡åããšãã°ããã«ãããŸããèšå®ã¯æå°éã«æããããSpringãã¬ãŒã ã¯ãŒã¯ã®å šæ©èœãå©çšããããšãã§ããŸãã
ãŸããSpring Bootã¯çµã¿èŸŒã¿ã®TomcatãJettyãUndertowãµãŒããŒãæã£ãŠãããããå¥éãWebãµãŒããŒãæºåããå¿ èŠããããŸãããããã«ãããéçºãããããã€ã¡ã³ããŸã§ã®æéãå€§å¹ ã«ççž®ããããšãå¯èœã§ãã
ããã«ãSpring Bootã¯ãSpring DataãSpring Securityãªã©ã®Springãããžã§ã¯ããšã®çµ±åã容æã§ãããããäžè²«æ§ã®ããéçºäœéšãæäŸããŸãã
3.2 JavaFX
JavaFXã¯ãJavaã§ãªãããªã¯ã©ã€ã¢ã³ãã¢ããªã±ãŒã·ã§ã³ãäœæããããã®ã©ã€ãã©ãªã§ããäž»ãªç¹é·ãšããŠã¯ãè±å¯ãªã°ã©ãã£ãã¯ã¹ãšãŠãŒã¶ãŒã€ã³ã¿ãŒãã§ãŒã¹ã®ã³ã³ããŒãã³ããæããããŸãã
JavaFXã¯ãWindowsãMacãLinuxãªã©ãããŸããŸãªãã©ãããã©ãŒã ã§åäœããŸããããã«ãããäžåºŠæžãããã³ãŒããå€æ§ãªç°å¢ã§å®è¡ã§ãããWrite once, run anywhereãã®ç念ã«è²¢ç®ããŠããŸãã
ãŸããJavaFXã¯FXMLã䜿çšããUIèšèšãå¯èœã«ããŸããããã«ããããã¶ã€ããŒãšéçºè ãååããŠãŠãŒã¶ãŒãšã¯ã¹ããªãšã³ã¹ãæé©åããããšãå¯èœã«ãªããŸãã
3.3 Apache Commons
Apache Commonsã¯ãåå©çšå¯èœãªJavaã³ã³ããŒãã³ããæäŸããã©ã€ãã©ãªã§ãããã®ã©ã€ãã©ãªããæäŸãããã³ã³ããŒãã³ãã¯ãéçºè ãäžããäœæããå¿ èŠã®ããäžè¬çãªã¿ã¹ã¯ãå€§å¹ ã«æžããå©ãã«ãªããŸãã
Apache Commonsã«ã¯ãæååæäœãæ°å€èšç®ããã¡ã€ã«æäœããããã¯ãŒã¯æäœãšãã£ãäžè¬çãªæ©èœãå«ãŸããŠããŸãããããã®æ©èœã¯ãéçºè ãã·ã¹ãã ã®äž»èŠãªããžãã¹ããžãã¯ã«éäžã§ããããã«ãã€ãŸã¥ããããåé¡ã®è§£æ±ºãæ¯æŽããŸãã
ããã«ãApache Commonsã³ã³ããŒãã³ãã¯ãå ç¢ã§ä¿¡é Œæ§ãããã倧èŠæš¡ãªã³ãã¥ããã£ããåºç¯å²ã«ããããã¹ããšãã£ãŒãããã¯ãåããŠããŸãã
3.4 Junit
Junitã¯ãJavaã§åäœãã¹ããè¡ãããã®æšæºçãªã©ã€ãã©ãªã§ããå©äŸ¿æ§ãšæè»æ§ãå ŒãåããŠãããæ£ç¢ºãªãã¹ããè¡ãããã®å€æ©èœãæäŸããŸãã
JUnitã¯ãããã¹ãé§åéçºãïŒTDDïŒã®æ¯æè ã«ãšã£ãŠéåžžã«æçšãªããŒã«ã§ããéçºè ãå ã«ãã¹ãã±ãŒã¹ãäœæãããã®ãã¹ãã±ãŒã¹ãééããã³ãŒããåŸããæžãããšãå¯èœã«ããŸãã
ãŸããJUnitã¯å®æçã«ãã¹ããèªååããããŒãžã§ã³ç®¡çã·ã¹ãã ãšçµ±åããããšãå¯èœã§ããããã«ãããã³ãŒãã®å€æŽãä»ã®éšåã«æªåœ±é¿ãåãŒãããšãªããå質ãäžè²«ããŠä¿ã€ããšãã§ããŸãã
4. Java ã©ã€ãã©ãªã®æè¿ã®åå
Java ã©ã€ãã©ãªã®äžçã¯ãåžžã«æ°ããæè¡ã®å°å ¥ãšãšãã«é²åãç¶ããŠããŸããããã§ã¯ãJava ã©ã€ãã©ãªã®æè¿ã®ååã詳ãã解説ããŸããããããã®ãã¬ã³ãã¯ãéçºçŸå Žã§ã®çç£æ§åäžããæŽãªãå¯èœæ§ã®æ¢æ±ãèæ¯ã«ãããŸãã
ãã®ç¯ã§ã¯ãã»ãã¥ãªãã£ã®ååãJava 8以éã®ã©ã€ãã©ãªã®å€æŽç¹ãIoTãšJavaã©ã€ãã©ãªãAIãšJavaã©ã€ãã©ãªã«ã€ããŠèŠãŠãããŸããããããçŸåšã®Javaã®éçºç°å¢ã«ãããŠã¯ãéèŠãªããŒã¯ãŒãã§ãããéçºè éã®é¢å¿ã¯æ¥ã é«ãŸã£ãŠããŸãã
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4.1 Java ã©ã€ãã©ãªã®ã»ãã¥ãªãã£ãã¬ã³ã
Java ã©ã€ãã©ãªã®ã»ãã¥ãªãã£ã¯ãåžžã«éèŠãããŠããŸãããã®äžã§ããäŸµå ¥æ€ç¥ã·ã¹ãã ã®ã©ã€ãã©ãªãæå·åé¢é£ã®ã©ã€ãã©ãªãªã©ãã»ãã¥ãªãã£åŒ·åã«é æ ®ããããã®ãå€ãã§ãããããã¯ãJavaã®éçºçŸå Žã«ãããŠãéèŠãªåœ¹å²ãæãããŠããŸãã
ãŸããè匱æ§ãæ€åºããããã®ã©ã€ãã©ãªãæ®åããŠããŸãããããã®ã©ã€ãã©ãªã䜿çšããããšã§ãã»ãã¥ãªãã£ããŒã«ãæ©æã«çºèŠãã察çãæã€ããšãå¯èœãšãªã£ãŠããŸãã
ç¶ããŠãããŒã å šäœã§ã®ã»ãã¥ãªãã£æèåäžãå¯ããªãã¬ã³ããšãªã£ãŠããŸããéçºè ãèªåèªèº«ã§ã»ãã¥ãªãã£åé¡ã«ã€ããŠåŠã³ãç解ããããšã§ãåé¡ãæ©æã«çºèŠã察å¿ã§ããããã«ãªããšå ±ã«ãã»ãã¥ãªãã£ã®é«ãã³ãŒããæžãããšãã§ããŸãã
4.2 Java 8以éã®ã©ã€ãã©ãªã®å€æŽç¹
Java 8以éãã©ã€ãã©ãªã®æ¹åãšæŽæ°ãç¶ããããŠããŸãããããã¯äž»ã«ããã©ãŒãã³ã¹ã®åäžããæ°æ©èœã®å°å ¥ãæ¹è¯ãã¡ã€ã³ã§ãããéçºè ã®çç£æ§åäžã«å€§ãã«è²¢ç®ããŠããŸãã
ç¹ã«ãã¹ããªãŒã APIã®å°å ¥ããªãã·ã§ãã«ã¯ã©ã¹ã®å°å ¥ãªã©ãæ°ããªããã°ã©ãã³ã°ãã©ãã€ã ãæ¡çšããããšã«ãã£ãŠãããçŽæçã§ç°¡æœãªã³ãŒãã£ã³ã°ãå¯èœãšãªããéçºè ããã®è©äŸ¡ãé«ãã§ãã
ããã«ãæ°ããªäžŠååŠçã©ã€ãã©ãªã®å°å ¥ã«ããããã«ãã¹ã¬ããåŠçããã容æãã€å¹ççã«è¡ããããã«ãªããŸããããããã®å€æŽã¯ãJavaãåŒãç¶ãã倧èŠæš¡ãªã·ã¹ãã ãæ¯ããèšèªãšããŠæé·ãç¶ããããšã瀺ããŠããŸãã
4.3 IoTãšJavaã©ã€ãã©ãª
IoTã®çºå±ãšãšãã«ãJavaã§IoTããã€ã¹ãå¶åŸ¡ããããã®ã©ã€ãã©ãªãå¢ããŠããŸããããããã¯éåžžã«å€æ§ã§ãã»ã³ãµãŒããŒã¿ã®åéãããã€ã¹ã®å¶åŸ¡ããããã¯ãŒã¯ã®éä¿¡ãšãã£ãåºç¯ãªæ©èœãæäŸããŠããŸãã
ãã®äžã§ããIoTã®æ ¹å¹¹ããªãã»ã³ãµãŒããŒã¿ã®åŠçããããã€ã¹éã®ã³ãã¥ãã±ãŒã·ã§ã³ããµããŒãããã©ã€ãã©ãªã¯ãIoTã·ã¹ãã ãéçºããäžã§å¿ é ã®ããŒã«ãšãªã£ãŠããŸãã
ãªã¢ã«ã¿ã€ã åŠçã©ã€ãã©ãªã®æ®åãèŠéããŸãããããã«ãããããã€ã¹ããã®ããŒã¿ãé«éã«åŠçããçŽ æ©ãçµæãåŸãããšãå¯èœãšãªããŸããããã®é²æ©ã«ãããããé«åºŠãªIoTã·ã¹ãã ãå¯èœãšãªã£ãã®ã§ãã
4.4 AIãšJavaã©ã€ãã©ãª
Javaã§ãAIïŒäººå·¥ç¥èœïŒé¢é£ã®ã©ã€ãã©ãªãéåžžã«å å®ããŠããŸãããæ©æ¢°åŠç¿ã©ã€ãã©ãªã深局åŠç¿ã©ã€ãã©ãªãèªç¶èšèªåŠçã©ã€ãã©ãªãç»åèªèã©ã€ãã©ãªãªã©ãå€å²ã«ãããAIé¢é£ã©ã€ãã©ãªãååšããŸãã
ãããã®ã©ã€ãã©ãªãå©çšããããšã§ãJavaã«ããAIéçºã容æã«ãªããããå€ãã®éçºè ãAIã掻çšããã¢ããªã±ãŒã·ã§ã³ã®éçºãå¯èœã«ãªããŸããã
ç¹ã«æ³šç®ãã¹ãã¯ã深局åŠç¿ãšç»åèªèã©ã€ãã©ãªã§ãããããã¯å€§éã®ããŒã¿ãããã¿ãŒã³ãåŠç¿ããæ£ç¢ºãªå€æãè¡ãããšãå¯èœãšãªããããå»çã補é æ¥ããµãŒãã¹æ¥ãªã©ãæ§ã ãªåéã§äœ¿ãããŠããŸãã
5. Java ã©ã€ãã©ãªã®éçºãžã®é©çš
Javaã©ã€ãã©ãªã¯ãWebéçºããã¢ãã€ã«éçºãããŒã¿ããŒã¹ããããã¯ãŒãã³ã°ãŸã§ãæ§ã ãªéçºé åã§å©çšãããŠããŸããåé åãèŠãŠã¿ãŸãããã
ç¹å¥ãªç¥èãçµéšãå¿ èŠãšããªããããJavaã©ã€ãã©ãªã¯éçºè éã«ãšã£ãŠãšãŠãå©çšããããããŒã«ã§ãã
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5.1 Webã¢ããªã±ãŒã·ã§ã³éçº
Java SpringãApache Strutsãªã©ã®ãã¬ãŒã ã¯ãŒã¯ã¯ãJavaã©ã€ãã©ãªã®äžã§æãããç¥ãããŠããŸãããããã¯éçºè ãWebã¢ããªã±ãŒã·ã§ã³ãçŽ æ©ãæ§ç¯ã§ããããã«ããããã®ã©ã€ãã©ãªãæäŸããŸãã
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Java Webéçºè ã¯ããããã®ã©ã€ãã©ãªã䜿çšããŠå¹ççã«ã³ãŒããäœæããã¡ã³ããã³ã¹äœæ¥ãç°¡ç¥åããããšãå¯èœã§ãã
5.2 ã¢ãã€ã«ã¢ããªã±ãŒã·ã§ã³éçº
Androidã¯çŸåšæãããã¥ã©ãŒãªã¢ãã€ã«ãªãã¬ãŒãã£ã³ã°ã·ã¹ãã ã®äžã€ã§ãããJavaã䜿çšããŠéçºãããŠããŸãã
Javaã®ã©ã€ãã©ãªã¯ã¢ãã€ã«ã¢ããªã±ãŒã·ã§ã³éçºã容æã«ããããã®å€ãã®ããŒã«ãæäŸããŠããŸããäŸãã°ãSQLiteããŒã¿ããŒã¹ã«ã¢ã¯ã»ã¹ããããã®ã©ã€ãã©ãªããHTTPéä¿¡ãç°¡æåããããã®ã©ã€ãã©ãªäŒŒã¡ãã«åŒ·åããŠããŸãã
補åã®ãªãªãŒã¹ãæ©ãããããžã§ã¯ãã®ã©ã€ããµã€ã¯ã«å šäœãå¹çåããããã«ãJavaã®ã¢ãã€ã«éçºåãã©ã€ãã©ãªã掻çšããããšããšãŠãéèŠã§ãã
5.3 ããŒã¿ããŒã¹ãšJavaã©ã€ãã©ãª
ããŒã¿ããŒã¹æäœã¯ãœãããŠã§ã¢éçºã®æ žå¿çãªéšåã§ãããããJavaã©ã€ãã©ãªã匷åãªæ¯æŽãæäŸããŠããŸãã
JDBC(Java DataBase Connectivity)ã¯ãJavaã§ãªã¬ãŒã·ã§ãã«ããŒã¿ããŒã¹ã«ã¢ã¯ã»ã¹ããããã®APIã§ãããäžé£ã®ã©ã€ãã©ãªã§æ§æãããŠããŸãã
HibernateãJOOQãšãã£ãã©ã€ãã©ãªã¯ãããŒã¿ããŒã¹æäœãæŽã«ç°¡åã«ããããã®åŒ·åãªããŒã«ãæäŸããŠããŸãã
5.4 ãããã¯ãŒãã³ã°ãšJavaã©ã€ãã©ãª
Javaã¯ããããã¯ãŒãã³ã°æäœãè¡ãããã®åŒ·åãªã©ã€ãã©ãªãæã£ãŠããŸãããããã®ã©ã€ãã©ãªã䜿çšããããšã§ããœã±ããéä¿¡ãURLæäœããããã¯ãŒã¯ã€ã³ã¿ãŒãã§ãŒã¹ã®ååŸãªã©ã®äžè¬çãªãããã¯ãŒãã³ã°ã¿ã¹ã¯ãç°¡åã«è¡ãããšãã§ããŸãã
Apache HttpClientãOkHttpãšãã£ãã©ã€ãã©ãªã¯ããã埩éãªãããã¯ãŒãã³ã°æäœãå®è¡ããããã®åŒ·åãªããŒã«ãæäŸããŸãã
ãããJavaã®ãããã¯ãŒãã³ã°ã©ã€ãã©ãªã¯ããããã¯ãŒãã³ã°ã¢ããªã±ãŒã·ã§ã³ã®éçºã容æã«ããéçºè ãæéãç¯çŽã§ããããã«åœ¹ç«ã¡ãŸãã
6. Java ã©ã€ãã©ãªã®ãããã
éçºè ãã¡ã®æ¥ã ã®äœæ¥ã軜æžããŠããããJava ã©ã€ãã©ãªããã®éèŠã圹å²ã¯ãããŸã§äžè²«ããŠå¢ãç¶ããŠããŸãããããããããã¯ãã®æªæ¥ã«ã€ããŠæã ãçåãæã€ããšãæå³ããŸãããããã§ã¯ãJava ã©ã€ãã©ãªã®æªæ¥ã¯ã©ãã«åãã£ãŠããã®ã§ããããïŒ
泚ç®ãã¹ãæè¡çåŸåãåžå Žè»¢æç¹ãèžãŸããŠãJava ã©ã€ãã©ãªã®æªæ¥ã«ã€ããŠæ·±ãæ¢æ±ããŠãããŸããããåæã«ããããããã¬ãŒã ã¯ãŒã¯ãšã®é¢ä¿ãã¯ã©ãŠããšã®ã·ããžãŒã«ã©ã®ããã«åœ±é¿ãäžããã®ããè°è«ããŸãã
ãã®åŸãJava ã©ã€ãã©ãªãæ°ãã«éæŸããã§ãããå¯èœæ§ã«ã€ããŠãèããŠãããŸããå 端æè¡ãšJava ã©ã€ãã©ãªãã©ã®ããã«èåããæŽãªãé©æ°ãããããã®ããèŠãŠãããŸãããã
6.1 Java ã©ã€ãã©ãªã®æªæ¥äºæž¬
Java ã©ã€ãã©ãªã®æªæ¥ã¯ãŸãã§ããºã«ã®ããã§ããåéšåã¯ãããããæå¹ãªãšã³ã·ã¹ãã å ã§æ©èœããå šäœãšããŠäžã€ã®ã³ããŒã¬ã³ããªããžã§ã³ã圢æããŸãã
äžéšã®å°é家ã¯ãã©ã€ãã©ãªãç¹å®ã®åé¡ã解決ããããã®ãã®ãããå¹ åºãçšéãšæè»æ§ãæã€ããŒã«ãžãšå€ããã€ã€ãããšäºæž¬ããŠããŸããããã¯ãéçºè ããããŸã§ä»¥äžã«ã«ã¹ã¿ãã€ãºããããããããŠå ç¢ãªãœãªã¥ãŒã·ã§ã³ãæ§ç¯ããããšãå¯èœã«ããŸãã
ãŸããã©ã€ãã©ãªãããããçš®ã ã®æ©èœçŸ€ã«ã¯ããã«å€ãã®æ®éæ§ãšäºææ§ãæ±ããããã§ããããããã«ãããåäžã®ã©ã€ãã©ãªãæ§ã ãªã·ãã¥ãšãŒã·ã§ã³ãã¢ããªã±ãŒã·ã§ã³ã«å¯Ÿå¿ãããããšãã§ããããã«ãªãã§ãããã
6.2 ãã¬ãŒã ã¯ãŒã¯ãšã®é¢ä¿
Java ã©ã€ãã©ãªãšãã¬ãŒã ã¯ãŒã¯ãšã®é¢ä¿ã¯ãéçºè ã®äœæ¥ãå¹çåããçæéã§ããã¹ããªã¢ããªã±ãŒã·ã§ã³ãå®è£ ããããã«éèŠã§ãããããäºã€ã¯ãäºããè£ãåããåãããŠåŒ·åãªéçºãšã³ã·ã¹ãã ãæ§ç¯ãã圹å²ãæãããŠããŸãã
ãã¬ãŒã ã¯ãŒã¯ã¯ãã°ãã°ãå ·äœçãªããžãã¹ããŒãºã«å¯Ÿå¿ããäœæ¥æé ãèšèšååãæå®ããŸããäžæ¹ãJava ã©ã€ãã©ãªã¯ããã¬ãŒã ã¯ãŒã¯ãèŠå®ããæŠå¿µãå ·äœçãªæ©èœã«å€æãã圹å²ãæãããŸãã
ãããã£ãŠãJava ã©ã€ãã©ãªã®æªæ¥ã¯ããã¬ãŒã ã¯ãŒã¯ãšã®é¢é£æ§ãç¶æãã€ã€ãç°ãªãçš®é¡ã®ãã¬ãŒã ã¯ãŒã¯ã®ããŒãºãæºããããã«ããã«å€æ©èœã§æ®éçã«ãªãã§ãããã
6.3 ã¯ã©ãŠããšJavaã©ã€ãã©ãª
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Java ã©ã€ãã©ãªã¯ãã¯ã©ãŠããã©ãããã©ãŒã äžã§å€æ§ãªã¢ããªã±ãŒã·ã§ã³ãå¹ççã«éçšããããã®éèŠãªããŒã«ãšãªãåŸãŸãããã®ãããããããã®Java ã©ã€ãã©ãªã¯ãã ãŒã¢ã®æ³åã«åŸã£ãŠã³ã³ãã¥ãŒãã£ã³ã°ãªãœãŒã¹ãå¢å ããã¯ã©ãŠãç°å¢ãšçžäºäœçšããããã®æ°æ©èœãæã€ã§ãããã
Java ã©ã€ãã©ãªãçšããããšã§ãã¯ã©ãŠãããŒã¹ã®ã¢ããªã±ãŒã·ã§ã³ã®ããã©ãŒãã³ã¹ãåäžãããã·ã¹ãã ã®æ¡åŒµæ§ãšä¿¡é Œæ§ãä¿èšŒããããšãå¯èœã«ãªããŸãã
6.4 Java ã©ã€ãã©ãªã®æ°ããªå¯èœæ§
Java ã©ã€ãã©ãªã¯ãé©æ°çãªãã¯ãããžãŒãã¬ã³ããšäº€æµãç¶ãããããã®ååãåæ ããæ°ããªå¯èœæ§ãæ¢æ±ããŠããŸããã
AIïŒäººå·¥ç¥èœïŒãMLïŒæ©æ¢°åŠç¿ïŒã¯ãJava ã©ã€ãã©ãªãæ°ããªææãåŸãããé åãšããŠç¹ã«æ³šç®ãããŠããŸããJava ã©ã€ãã©ãªã¯ãããã®é åã«å¯Ÿå¿ããããã®æ°ããªããŒã«ããã¬ãŒã ã¯ãŒã¯ãç¶ç¶çã«éçºããŠããã§ãããã
ãŸãããããã¯ãã§ãŒã³ãããããå·¥åŠãVR/ARãªã©ã®æè¡ãJava ã©ã€ãã©ãªã®é²åã®äžéšã§ããããããã®é åã§ã®Java ã©ã€ãã©ãªã®å©çšã¯ãããªãåæ©ã¥ããšãªãã§ãããã