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1. Java ããã©ãããã©ãŒã ã«äŸåããªãèšèªã§ããçç±ã¯äœã§ãã?
Java ã¯ãJDK (Java Development Kit) ã«ãã£ãŠçæããããã€ã ã³ãŒããããªãã¬ãŒãã£ã³ã° ã·ã¹ãã ã«é¢ä¿ãªããä»»æã®ãã©ãããã©ãŒã äžã® JVM (Java Virtual Machine) ã«ãã£ãŠå®è¡ã§ããããããã©ãããã©ãŒã éäŸåèšèªãšåŒã°ããŸãã
2. ãªã Java ã¯å®å
šãªãªããžã§ã¯ãæåèšèªã§ã¯ãªãã®ã§ãã?
Java ã¯ããªããžã§ã¯ãã§ã¯ãªã 8 ã€ã®ããªããã£ã ããŒã¿å (
booleanã
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floatã
doubleã
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šãªãªããžã§ã¯ãæåèšèªã§ã¯ãããŸããã
3. Java ã§ã¯ main() ã¡ãœãããéçã«ãªã£ãŠããã®ã¯ãªãã§ãã?
main()ã¡ãœããã¯éçã«å®£èšãããŠããããã宣èšãããŠããã¯ã©ã¹ã®ãªããžã§ã¯ããã€ã³ã¹ã¿ã³ã¹ãäœæããã« JVM ããçŽæ¥åŒã³åºãããšãã§ããŸãã
4. Java ã®ã©ãã㌠ã¯ã©ã¹ãšã¯äœã§ãã?
Java ã§ã¯ã
intã
floatãªã©ã®ãã¹ãŠã®ããªããã£ã ããŒã¿åã«ã¯ãã©ãã㌠ã¯ã©ã¹ãšåŒã°ãã察å¿ããã¯ã©ã¹ããããŸãããããã¯ãããªããã£ã ããŒã¿åãã©ãããŸãã¯ãªããžã§ã¯ãã«å€æãããããã©ãããŒãšãåŒã°ããŸãã
5. Java ã®ã³ã³ã¹ãã©ã¯ã¿ãŒãšã¯äœã§ãã?
Java ã®ã³ã³ã¹ãã©ã¯ã¿ãŒã¯ããªããžã§ã¯ããŸãã¯ã€ã³ã¹ã¿ã³ã¹ã®äœææã«èªåçã«åŒã³åºãããç¹å¥ãªã¡ãœããã§ããã³ã³ã¹ãã©ã¯ã¿ãŒåãšã¯ã©ã¹åã¯äžèŽããå¿
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6. Java ã®é
åãš ArrayList ã®éãã¯äœã§ãã?
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7. Java ã¯ãªããã€ã³ã¿ã䜿çšããªãã®ã§ãã?
Java ã¯ãã€ã³ã¿ã䜿çšããŸããããã€ã³ã¿ã¯å®å
šã§ã¯ãªããããã°ã©ã ãè€éã«ãªãããã§ããããã«ãJava ã¯ãã€ã³ã¿ãåé¿ããŠããŠãŒã¶ãŒã«çŽæ¥ã¡ã¢ãª ã¢ã¯ã»ã¹ãæäŸããããšãåé¿ããŸãã
8. Java ã«ã¯ã©ã®ãããªçš®é¡ã®ã¢ã¯ã»ã¹ä¿®é£ŸåããããŸãã?
Java ã§ã¯ãã¢ã¯ã»ã¹ä¿®é£Ÿåã¯ãã¯ã©ã¹å€ãŸãã¯å¥ã®ã¯ã©ã¹å
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- ããã©ã«ã
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- ä¿è·ãããŠããŸã
9. Java ã® JIT ãšã¯äœã§ãã?
JIT ã¯ãJava ã® Just-In-Time Compiler ã®é åèªã§ããå®è¡æã«ããã€ãã³ãŒãããã€ãã£ã ãã·ã³ ã³ãŒãã«å€æããŸããJIT ã³ã³ãã€ã©ãŒã¯ãJava ããã°ã©ã ã®ããã©ãŒãã³ã¹ã®åäžã«åœ¹ç«ã¡ãŸãã
10. Javaã®finalããŒã¯ãŒããšã¯äœã§ãã?
Java ã§ã¯ã
finalããŒã¯ãŒãã¯å®æ°ãè¡šãããã«äœ¿çšãããŸããå€æ°ãã¯ã©ã¹ãã¡ãœãããšãšãã«äœ¿çšã§ããŸãã
- FinalããŒã¯ãŒããå€æ°ãšãšãã«äœ¿çšãããŠããå Žåããã®å€ã¯å€æŽã§ããŸããã
- FinalããŒã¯ãŒããã¡ãœããã§äœ¿çšãããŠããå Žåããã®ã¡ãœããããªãŒããŒã©ã€ãããããšã¯ã§ããŸããã
- ã¯ã©ã¹ãFinal ãšå®£èšãããšããã®ã¯ã©ã¹ããµãã¯ã©ã¹ã«æ¡åŒµãããç¶æ¿ãããããããšã¯ã§ããŸããã
11. OOP (Java ã®ãªããžã§ã¯ãæåããã°ã©ãã³ã°) ã®åºæ¬æŠå¿µã¯äœã§ãã?
Java ã®ãªããžã§ã¯ãæåããã°ã©ãã³ã° (OOP) ã§ã¯ã次㮠4 ã€ã®äž»èŠãªæŠå¿µã䜿çšãããŸãã
- ã«ãã»ã«åã
- æœè±¡åã
- ç¶æ¿ã
- å€æ
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12. Java ã®ã·ã³ã°ã«ãã³ ã¯ã©ã¹ãšã¯äœã§ãã?ãŸããã¯ã©ã¹ãã·ã³ã°ã«ãã³ã«ããæ¹æ³ã¯äœã§ãã?
Java ã§ã¯ãã·ã³ã°ã«ãã³ ã¯ã©ã¹ã¯ãã€ã³ã¹ã¿ã³ã¹ãŸãã¯ãªããžã§ã¯ãã 1 ã€ã ãæã€ã¯ã©ã¹ã§ãããã©ã€ããŒã ã³ã³ã¹ãã©ã¯ã¿ãŒãäœæããããšã§ãã¯ã©ã¹ãã·ã³ã°ã«ãã³ã«ããããšãã§ããŸãã
13. Java ã®ããŒã«ã«å€æ°ãšã€ã³ã¹ã¿ã³ã¹å€æ°ã®éãã¯äœã§ãã?
ããŒã«ã«å€æ°ã¯ãããã¯ãŸãã¯ã¡ãœããå
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14. OOP ãŸãã¯ãªããžã§ã¯ãæåããã°ã©ãã³ã°ãšã¯äœã§ãã?
ãªããžã§ã¯ãæåããã°ã©ãã³ã° (OOP) ã¯ããªããžã§ã¯ãã®æŠå¿µã䜿çšããŠããã°ã©ã ãã¢ããªã±ãŒã·ã§ã³ãéçºããããã«äœ¿çšãããããã°ã©ãã³ã° ãã©ãã€ã ã§ãã
15. Java æååãäžå€ã«ããã®ã¯ãªãã§ãã?
Java ã®æååã¯äžå€ã§ããã€ãŸããæååãªããžã§ã¯ããäœæããããšæŽæ°ããããšã¯ã§ããŸããããæ°ããæååãªããžã§ã¯ãã¯äœæãããŸããããã¯ãæååãªããžã§ã¯ããæååããŒã«ã«ãã£ãã·ã¥ãããããã§ãã
16. Java ã®ã€ã³ã¿ãŒãã§ã€ã¹ ã¯ã©ã¹ãšæœè±¡ã¯ã©ã¹ã®éãã«ã€ããŠèª¬æãã
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17. ããªã¢ãŒãã£ãºã ãšã¯äœãæå³ããŸãã?ãŸããã®çš®é¡ã¯äœã§ãã?
Java ã«ãããããªã¢ãŒãã£ãºã ãšã¯ããªããžã§ã¯ããè€æ°ã®åœ¢åŒãåãããšãã§ããæ©èœã§ããããŸããŸãªæ¹æ³ã§å®è¡ã§ããåäžã®ã¿ã¹ã¯ãŸãã¯ã¢ã¯ãã£ããã£ãšããŠå®çŸ©ããããšãã§ããŸããããªã¢ãŒãã£ãºã 㯠2 ã€ã®ã¿ã€ãã«åé¡ãããŸãã
- ã³ã³ãã€ã«æã®ããªã¢ãŒãã£ãºã ã
- å®è¡æã®ããªã¢ãŒãã£ãºã ã
18. Java ã¯ã©ã®ããã«ããŠã³ã³ãã€ã«æããã³å®è¡æã®ããªã¢ãŒãã£ãºã ãå®çŸããŸãã?
Java ã§ã¯ãã³ã³ãã€ã«æã®ããªã¢ãŒãã£ãºã ã¯ã¡ãœããã®ãªãŒããŒããŒãã«ãã£ãŠå®çŸãããŸãããå®è¡æã®ããªã¢ãŒãã£ãºã ã¯ã¡ãœããã®ãªãŒããŒã©ã€ãã«ãã£ãŠå®çŸãããŸãã
19. æœè±¡åãšã¯äœãæå³ããŸãã? Java ã§ã¯æœè±¡åã¯ã©ã®ããã«å®çŸãããŸãã?
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20. Java ã®ã€ã³ã¿ãŒãã§ãŒã¹ãšã¯äœã§ãã?
Java ã®ã€ã³ã¿ãŒãã§ã€ã¹ã¯ãé¢æ°å®£èšã®ã¿ãåããæœè±¡ã¡ãœããã®ã»ããã§ãããå®è£
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21. Java ã«ã¯ã©ã®ãããªçš®é¡ã®ç¶æ¿ããããŸãã?
Java ã§ã¯ãextends ããŒã¯ãŒãã䜿çšããŠãã¹ãŒããŒã¯ã©ã¹ãŸãã¯åºæ¬ã¯ã©ã¹ã®å±æ§ãšã¡ãœãããç¶æ¿ããŸããç¶æ¿ã«ã¯æ¬¡ã® 5 ã€ã®ã¿ã€ãããããŸãã
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22. Java ã¯ãªãå€éç¶æ¿ããµããŒãããªãã®ã§ãã?
Java ã§ã¯ããããŸãããé²ãããã«å€éç¶æ¿ã¯ãµããŒããããŠããŸãããããšãã°ã2 ã€ã®ã¹ãŒããŒã¯ã©ã¹ A ãš B ããããA ãš B ã®äž¡æ¹ãç¶æ¿ãããµãã¯ã©ã¹ C ããããšããŸããã¯ã©ã¹ A ãš B ã®äž¡æ¹ã« show() ã¡ãœããããã
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23. ã¡ãœããã®ãªãŒããŒããŒããšã¡ãœããã®ãªãŒããŒã©ã€ãã®éãã¯äœã§ãã?
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24. Java ã§éçã¡ãœãããŸãã¯ãã©ã€ããŒã ã¡ãœããããªãŒããŒã©ã€ãããããšã¯ã§ããŸãã?
ãã©ã€ããŒã ã¡ãœããã¯ã¯ã©ã¹ã®å€éšããã¢ã¯ã»ã¹ã§ããªãããããµãã¯ã©ã¹ã«ãã£ãŠãªãŒããŒã©ã€ããããŸããããããã£ãŠãããããªãŒããŒã©ã€ãããããšã¯ã§ããŸãããåæ§ã«ãåºæ¬ã¯ã©ã¹ãšæŽŸçã¯ã©ã¹ã®äž¡æ¹ã§åãã¡ãœããåãšã·ã°ããã£ãæã€éçã¡ãœãããäœæãããšã掟çã¯ã©ã¹ã¯åºæ¬ã¯ã©ã¹ã®ã¡ãœãããé衚瀺ã«ãããããéçã¡ãœããããªãŒããŒã©ã€ãããããšã¯ã§ããŸãããããã¯ã¡ãœããã®é èœãšããŠç¥ãããŠããŸãã
25. Java ã«ãããã³ã³ã¹ãã©ã¯ã¿ãŒã®ãªãŒããŒããŒããšã¯äœã§ãã?
Java ã§ã¯ãã¯ã©ã¹ã«è€æ°ã®ã³ã³ã¹ãã©ã¯ã¿ãŒãããããã©ã¡ãŒã¿ãŒã®ãªã¹ããç°ãªãå Žåãã³ã³ã¹ãã©ã¯ã¿ãŒã¯ãªãŒããŒããŒããããŠãããšã¿ãªãããŸãã
26. æœè±¡ã¡ãœããããªãå Žåã§ããæœè±¡ã¯ã©ã¹ãå®çŸ©ã§ããŸãã?
ã¯ããæœè±¡ã¡ãœããããªããŠãæœè±¡ã¯ã©ã¹ãäœæã§ããŸãããã ããã¯ã©ã¹ã«å°ãªããšã 1 ã€ã®æœè±¡ã¡ãœãããå«ãŸããå Žåã¯ããããæœè±¡ãšããŠå®çŸ©ããå¿
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27. éçå€æ°ãšéçã¡ãœããã¯äœã«äœ¿çšãããŸãã?
åãªããžã§ã¯ãã®è€æ°ã®ã³ããŒãäœæãã代ããã«ãã¯ã©ã¹ã®ãã¹ãŠã®ãªããžã§ã¯ãã«å
±éã®ã¡ãœãããŸãã¯å€æ°ã䜿çšãããå Žåã¯ãéçã¡ã³ã㌠(ã¡ãœãããšå€æ°) ã䜿çšããŸããããšãã°ãEmployee ã¯ã©ã¹ã§ã¯ããã¹ãŠã®ãªããžã§ã¯ããåãäŒç€Ÿåãæã€ãããäŒç€Ÿåãéçã«ããããšãã§ããŸãã
28. Java ã«ã¯äœçš®é¡ã®ã³ã³ã¹ãã©ã¯ã¿ãŒããããŸãã?
Java ã«ã¯ 2 çš®é¡ã®ã³ã³ã¹ãã©ã¯ã¿ãŒããããŸãã
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29. Java ã¯ã³ã㌠ã³ã³ã¹ãã©ã¯ã¿ãŒã䜿çšããŸãã?
ããããJava ã«ã¯ C++ ã®ãããªã³ã㌠ã³ã³ã¹ãã©ã¯ã¿ãŒããããŸããã
30. Java ã®ã³ã³ã¹ãã©ã¯ã¿ãŒãšã¡ãœããã®éãã説æãã
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31. main() ã¡ãœããã䜿çšããã«ããã°ã©ã ãå®è¡ããããšã¯ã§ããŸãã?
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main()ã¡ãœãããªãã§ã¯ããã°ã©ã ãå®è¡ã§ããŸããã
32. Java ã§ã¯ this ããŒã¯ãŒãã¯äœãæå³ããŸãã?
Java ã® this ããŒã¯ãŒãã¯ãã¡ãœãããŸãã¯å€æ°ãåŒã³åºãçŸåšã®ãªããžã§ã¯ããåç
§ããããã«äœ¿çšãããåç
§å€æ°ã§ãã
33. Java 㧠this ããŒã¯ãŒãã䜿çšããŠéçã¡ã³ããŒãåç
§ããããšã¯ã§ããŸãã?
ã¯ããããã¯çŸåšã®ãªããžã§ã¯ãã®åç
§å€æ°ã§ãããããthis ããŒã¯ãŒãã䜿çšããŠéçã¡ã³ããŒãåç
§ã§ããŸãã
34. Java ã® main() ã¡ãœããããããªãã¯ã§ã¯ãªããã©ã€ããŒãã«ã§ããŸãã?
main()ã¡ãœããããã©ã€ããŒãã«ããããšã¯ã§ããŸãããå®è¡æãšã©ãŒãçºçãããããããã°ã©ã ã¯å®è¡ãããŸããã
35. Java ã§ã¯ super ããŒã¯ãŒãã¯äœãæå³ããŸãã?
Java ã§ã¯ãsuper ããŒã¯ãŒãã¯ãçŽæ¥ã®èŠªã¯ã©ã¹ã®ãªããžã§ã¯ããåç
§ããããã«äœ¿çšãããåç
§å€æ°ã§ãã
36. ãã¯ãã«ãšé
åã®éããè¿°ã¹ãŸãã
ãã¯ã¿ãŒ |
é
å |
ããã¯åçã«ãµã€ãºå€æŽãããé
åã§ãã |
åºå®ãµã€ãºã®ããŒã¿ââæ§é ã§ãã |
ãã¯ãã«ã¯åæãããŠããŸãã |
ã¢ã¬ã€ã¯åæãããŠããŸããã |
é
åã«æ¯ã¹ãŠé
ãã§ãã |
ãã¯ã¿ãŒã«æ¯ã¹ãŠé«éã§ãã |
Java ãªããžã§ã¯ãã®ã¿ãå«ãããä¿åãããã§ããŸãã |
ããã¯ãããªããã£ãåãš Java ãªããžã§ã¯ãã®äž¡æ¹ãæ ŒçŽããããã«äœ¿çšãããŸãã |
size()ã¡ãœããã䜿çšããŠããã¯ãã«ã®é·ãã調ã¹ãããšãã§ããŸãã |
lengthããããã£ã䜿çšããŠãé
åã®é·ãã確èªã§ããŸãã |
37. Java ã«ããããã«ãã¹ã¬ãããšã¯äœã§ãã?
ãã«ãã¹ã¬ãããšã¯ãåäžã®ããã°ã©ã å
ã§è€æ°ã®ã¿ã¹ã¯ãåæã«å®è¡ããããã»ã¹ã§ããããã¯ãããã»ããµã®è² è·ãæ倧åããããã«è¡ãããŸãã
38. Java ã§ãã«ãã¹ã¬ãããå®è£
ããã«ã¯ã©ã®ãããªæ¹æ³ããããŸãã?
Java ã§ã®ãã«ãã¹ã¬ããã¯ã次㮠2 ã€ã®æ¹æ³ã§å®è£
ã§ããŸãã
- Runnableã€ã³ã¿ãŒãã§ãŒã¹ãjava.lang.Runnableã«å®è£
ããããšã«ãã£ãŠã
- java.lang.Threadã®Threadã¯ã©ã¹ãæ¡åŒµããããšã«ãã£ãŠã
39. Java ã«ããã super ããŒã¯ãŒããš this ããŒã¯ãŒãã®éããããã€ãè¿°ã¹ãŸãã
çŽ æŽããã |
ãã |
芪ã¯ã©ã¹ã®ãªããžã§ã¯ããåç
§ããããã«äœ¿çšãããŸãã |
çŸåšã®ã¯ã©ã¹ ãªããžã§ã¯ããåç
§ããããã«äœ¿çšãããŸãã |
芪ã¯ã©ã¹ãŸãã¯åºæ¬ã¯ã©ã¹ã®ã¡ãœããã«ã¢ã¯ã»ã¹ããããã«äœ¿çšãããŸãã |
çŸåšã®ã¯ã©ã¹ã®ã¡ãœããã«ã¢ã¯ã»ã¹ããããã«äœ¿çšãããŸãã |
åºæ¬ã¯ã©ã¹ã®ããã©ã«ãã®ã³ã³ã¹ãã©ã¯ã¿ãŒãåŒã³åºããŸãã |
çŸåšã®ã¯ã©ã¹ã®ããã©ã«ãã®ã³ã³ã¹ãã©ã¯ã¿ãŒãåŒã³åºããŸãã |
40. ãµãã¯ã©ã¹ãšå
éšã¯ã©ã¹ã®éãã¯äœã§ãã?
ãµãã¯ã©ã¹ |
å
éšã¯ã©ã¹ |
ããã¯ãåºæ¬ã¯ã©ã¹ãŸãã¯èŠªã¯ã©ã¹ã®ããããã£ãšã¡ãœãããç¶æ¿ããã¯ã©ã¹ã§ãã |
ããã¯ãå¥ã®ã¯ã©ã¹å
ã«ãã¹ããããã¯ã©ã¹ã§ãã |
ã¹ãŒããŒã¯ã©ã¹ãŸãã¯åºæ¬ã¯ã©ã¹ã®ãã¹ãŠã®ãããªã㯠ã¡ã³ããŒãšä¿è·ãããã¡ã³ããŒã«ã¢ã¯ã»ã¹ã§ããŸãã |
å€éšã¯ã©ã¹ã®ãã¹ãŠã®ã¡ã³ããŒã«ã¢ã¯ã»ã¹ã§ããŸãã |
41. Javaã®ã¯ã©ã¹ããŒããŒãšã¯äœã§ãã?
Java ã¯ã©ã¹ ããŒããŒã¯ãå®è¡æã« Java ã¯ã©ã¹ã Java ä»®æ³ãã·ã³ (JVM) ã«ããŒãããããã«äœ¿çšããã Java ã©ã³ã¿ã€ã ç°å¢ (JRE) ã®ã³ã³ããŒãã³ãã§ãã
42. Try ãããã¯ã®åŸã« Catch ãããã¯ã§ Java äŸå€åŠçãè¡ãå¿
èŠããããŸãã?
ã¯ãã tryãããã¯ã«ãã£ãŠã¹ããŒãããäŸå€ã¯ catch ãããã¯ã§ãã£ãããããå¿
èŠãããããã
catchãããã¯
ã®äœ¿çšã¯å¿
é ã§ãã
43. Java ã®äŸå€ã®çš®é¡ã«ååãä»ãã
Java ã®äŸå€ã«ã¯æ¬¡ã® 2 ã€ã®ã¿ã€ãããããŸãã
- æªãã§ãã¯ã®äŸå€
- ãã§ãã¯ãããäŸå€
44. ã¹ã¬ããã®ç¶æ
ãšã¯äœã§ãã?
Java ã«ã¯ 4 ã€ã®ã¹ã¬ããç¶æ
ããããŸãã
- æ°ããæµãã
- å®è¡å¯èœã
- å®è¡äžå¯ã
- æ»äº¡ãŸãã¯çµäºã
45. NullPointerException ãšã¯äœã§ãã?
ãŠãŒã¶ãŒã null ãªããžã§ã¯ãã®å€ã«ã¢ã¯ã»ã¹ãŸãã¯å€æŽããããšãããšã NullPointerExceptionãã¹ããŒãããŸãã
46. JavaäŸå€åŠçã§ã¯ã©ã®ãããªçš®é¡ã®ããŒã¯ãŒãã䜿çšãããŸãã?
-
è©Šã
-
ãã£ãã
-
ã€ãã«
-
æãã
-
æãã
47. Java 㧠main() ã¡ãœããããªãŒããŒããŒãããããšã¯å¯èœã§ãã?
ã¯ãã
main()ã¡ãœããã¯ãªãŒããŒããŒãã§ããŸãããJVM ãŸã㯠Java ä»®æ³ãã·ã³ã¯å
ã®
main()ã¡ãœããã®ã¿ãåŒã³åºããŸãã
48. Java 㧠main() ã¡ãœããããªãŒããŒã©ã€ãããããšã¯ã§ããŸãã?
ãããã
main()ã¡ãœããã¯éçã¡ãœããã§ãããéçã¡ãœããããªãŒããŒã©ã€ãã§ããªãããã§ãã
49.equals() ãš == ã®éãã¯äœã§ãã?
Java ã§ã¯ã
equals() ã¯2 ã€ã®ãªããžã§ã¯ããŸãã¯å€æ°ã®å€ãæ¯èŒããããã«äœ¿çšãããã¡ãœããã§ããã
==ã¯ããã« 2 ã€ã®ãªããžã§ã¯ããŸãã¯å€æ°ã®ã¢ãã¬ã¹ãŸãã¯ã¡ã¢ãªäœçœ®ãæ¯èŒããããã«äœ¿çšãããæ¯èŒæŒç®åã§ãã
50. ã¯ã©ã¹ ã³ã³ã¹ãã©ã¯ã¿ãŒã¯å€ãè¿ãããšãã§ããŸãã?
ããããã³ã³ã¹ãã©ã¯ã¿ãŒã«ã¯æ»ãå€ã®åããªããããå€ãè¿ãããšã¯ã§ããŸããã
51. éèšãå®çŸ©ãã
éçŽã¯ã2 ã€ã®ã¯ã©ã¹éã® has-a é¢ä¿ãšããŠå®çŸ©ãããé¢é£ä»ãã®åœ¢åŒã§ããããã¯ã³ãŒããåå©çšããããã«è¡ãããŸããããã¯ã2 ã€ã®ã¯ã©ã¹éã®äžæ¹åãŸãã¯äžæ¹åã®é¢ä¿ã§ãã
52. åäŒãšã¯äœã§ãã?
ã¢ãœã·ãšãŒã·ã§ã³ã¯ããªããžã§ã¯ãã䜿çšã㊠2 ã€ã®ã¯ã©ã¹éã®é¢ä¿ãå®çŸ©ããŸããé¢ä¿ãŸãã¯é¢é£ä»ãã¯ã1 察 1ã1 察å€ãå€å¯Ÿå€ããŸãã¯å€å¯Ÿ 1 ã«ããããšãã§ããŸããéçŽãšåæã¯ãé¢é£ä»ãã® 2 ã€ã®åœ¢åŒã§ãã
53. æ§æãšã¯äœã§ãã?
åæã¯ã2 ã€ã®ã¯ã©ã¹ãçžäºã«äŸåããé¢é£ä»ãã®åœ¢åŒã§ãã
54. åçãã€ã³ãã£ã³ã°ãšéçãã€ã³ãã£ã³ã°ã®éãã¯äœã§ãã?
åçãã€ã³ãã£ã³ã°ã§ã¯ãã¡ãœããããªããžã§ã¯ãã«ãã€ã³ããããã©ãããå®è¡æã«æ±ºå®ãããŸããé
延ãã€ã³ãã£ã³ã°ã¯ãåçãã€ã³ãã£ã³ã°ã®å¥åã§ããéçãã€ã³ãã£ã³ã°ã§ã¯ãã¡ãœããããªããžã§ã¯ãã«ãã€ã³ããããã©ããã¯ã³ã³ãã€ã«æã«æ±ºå®ãããŸããéçãã€ã³ãã£ã³ã°ã¯ãæ©æãã€ã³ãã£ã³ã°ã®å¥åã§ãã
55. ã«ãã»ã«åãšæœè±¡åã®éãã説æãã
ã«ãã»ã«åã§ã¯ãããŒã¿ãšã¡ãœãããã¯ã©ã¹ãšåŒã°ããåäžã®åäœã«ããã±ãŒãžåãŸãã¯ãã³ãã«ãããŸããæœè±¡åã§ã¯éèŠãªæ
å ±ã®ã¿ã衚瀺ãããå
éšãŸãã¯å®è£
ã®è©³çŽ°ã¯é衚瀺ã«ãªããŸãã
56. Javaã®æœè±¡ã¯ã©ã¹ãšã¯äœã§ãã?
æœè±¡ã¯ã©ã¹ã¯ã€ã³ã¹ã¿ã³ã¹åã§ããªãã¯ã©ã¹ã§ãããåç
§å€æ°ãäœæã§ããŸããã¯ã©ã¹ã¯ãabstract ããŒã¯ãŒãã䜿çšããŠæœè±¡ãšããŠå®£èšãããŸããããã«ã¯ãæœè±¡ã¡ãœãããšéæœè±¡ã¡ãœããã®äž¡æ¹ãå«ãŸããŸãã
57. ã¡ãœããå
ã§ãfinal ããŒã¯ãŒããš abstract ããŒã¯ãŒãã®äž¡æ¹ã䜿çšã§ããŸãã?
ããããæœè±¡ã¡ãœããã¯
ãµãã¯ã©ã¹ã«ãã£ãŠãªãŒããŒã©ã€ããããå¿
èŠãããã
finalã¡ãœããã¯ãªãŒããŒã©ã€ãã§ããªãããã
finalã¡ãœãããšstaticã¡ãœãããæœè±¡ã¡ãœãããšäžç·ã«äœ¿çšããããšã¯ã§ããŸããã
58. ã€ã³ã¿ãŒãã§ãŒã¹å
ã§ã¡ãœãããfinalãšããŠå®£èšã§ããŸãã?
ããããã€ã³ã¿ãŒãã§ã€ã¹å
ã®ãã¹ãŠã®ã¡ãœããã¯æœè±¡ã¡ãœããã§ãããããã¡ãœããã
FinalãšããŠå®£èšããããšã¯ã§ããŸããããããã£ãŠãã¡ãœããã¯ãµãã¯ã©ã¹ã«ãã£ãŠå®è£
ããå¿
èŠãããã finalã¡ãœããã¯ãªãŒããŒã©ã€ãã§ããŸããã
59. ãã¹ãŠã® Java äŸå€ã¯ã©ã¹ã®åºæ¬ã¯ã©ã¹ã«ååãä»ããŸã
ãã¹ãŠã®äŸå€ã®åºæ¬ã¯ã©ã¹ã¯
java.lang.Throwableã§ãã
60. 1 ã€ã® try ãããã¯å
ã«è€æ°ã® catch ãããã¯ãäœæããããšã¯ã§ããŸãã?
ã¯ãã1 ã€ã®tryãããã¯ã«å¯ŸããŠè€æ°ã® catch ãããã¯ãäœæã§ããŸãã
61. Java ããã°ã©ã ãå®è¡ããããã«æå®ããå¿
èŠããã 2 ã€ã®ç°å¢å€æ°ãå®çŸ©ããŸãã
- ãã¹å€æ°ã
- ã¯ã©ã¹ãã¹å€æ°ã
62. Java ã§ãã¹ãã©ã¯ã¿ãŒã䜿çšããããšã¯ã§ããŸãã?
ããããJava ã§ã¯ãã¹ãã©ã¯ã¿ãŒã䜿çšã§ããŸããã
63. å¿åã¯ã©ã¹ãšã¯ã©ãããæå³ã§ãã?
Java ã®å¿åå
éšã¯ã©ã¹ã«ã¯ååããªãããªããžã§ã¯ãã 1 ã€ã ãäœæããŸãã
64. ãã¹ãŠã®ã¹ã¬ããã«å®è£
ããå¿
èŠããã Java ã¡ãœããã«ååãä»ããŸã
Run()ã¡ãœããã
65. Java ã«ããã Break ãš continue ã®éãã¯äœã§ãã?
å£ã |
ç¶ã |
ç¹å®ã®æ¡ä»¶ãæºããããå Žåã«ã«ãŒããçµäºãŸãã¯çµäºããããã«äœ¿çšãããŸãã |
äœããã®æ¡ä»¶ã«åºã¥ããŠçŸåšã®å埩ã®ã«ãŒãã®å®è¡ãã¹ãããããããã«äœ¿çšãããŸãã |
ã«ãŒããã¹ã€ããå
ã§äœ¿çšã§ããŸãã |
ã«ãŒãå
ã§ã®ã¿äœ¿çšãããŸãã |
66. Java ã®æååããŒã«ãšã¯äœã§ãã?
Java ã®æååããŒã«ã¯ãããŒã ã¡ã¢ãªã«æ ŒçŽãããæååã®ã³ã¬ã¯ã·ã§ã³ã§ãã
67. Java ã® throws ããŒã¯ãŒããš throws ããŒã¯ãŒãã®éãã¯äœã§ãã?
æãã |
æãã |
æ瀺çã«äŸå€ãã¹ããŒããããã«äœ¿çšãããŸãã |
å®è¡æã«ã¡ãœããã«ãã£ãŠã¹ããŒãããäŸå€ã宣èšããããã«äœ¿çšãããŸãã |
ã¡ãœããæ¬äœå
ã§äœ¿çšãããŸãã |
throwsããŒã¯ãŒãã䜿çšãããšãè€æ°ã®äŸå€ã宣èšã§ããŸãã |
Throwã®åŸã«ã¯ãExceptionã¯ã©ã¹ã®ã€ã³ã¹ã¿ã³ã¹ãç¶ããŸãã |
ãã®åŸã«ãã¹ããŒãããäŸå€ã¯ã©ã¹ã®ååãç¶ããŸãã |
68. åãã¯ã©ã¹ã®å¥ã®ã³ã³ã¹ãã©ã¯ã¿ãŒå
ã§ã³ã³ã¹ãã©ã¯ã¿ãŒãåŒã³åºãããšã¯ã§ããŸãã?
ã¯ããæåã®è¡ãšããŠ
this()ã䜿çšããŠãå¥ã®ã³ã³ã¹ãã©ã¯ã¿ãŒå
ã§åãã¯ã©ã¹ã®ã³ã³ã¹ãã©ã¯ã¿ãŒãåŒã³åºãããšãã§ããŸãã
69. Javaã§String BufferãšStringã¯ã©ã¹ãæ¯èŒããããšã¯ã§ããŸãã?
ãããã
String Bufferãš
Stringãªããžã§ã¯ããæ¯èŒããããšã¯ã§ããŸããããšã©ãŒãçºçããããã§ãã
70. ç¶æ¿äžã«ã³ã³ã¹ãã©ã¯ã¿ãŒã¯ã©ã®ãããªé åºã§åŒã³åºãããŸãã?
芪ã¯ã©ã¹ãŸãã¯åºæ¬ã¯ã©ã¹ã®ã³ã³ã¹ãã©ã¯ã¿ãŒãæåã«åŒã³åºããã次ã«æŽŸçã¯ã©ã¹ã®ã³ã³ã¹ãã©ã¯ã¿ãŒãåŒã³åºãããŸãã
71. ã³ã³ã¹ãã©ã¯ã¿ãŒã«ã¯ã©ã¹å以å€ã®ååãä»ããããšã¯ã§ããŸãã?
ããããã³ã³ã¹ãã©ã¯ã¿ãŒãšã¯ã©ã¹åã¯åãã§ããå¿
èŠããããŸãã
72. Java ããã±ãŒãžãšã¯äœã§ãã?
ããã±ãŒãžã¯ãã°ã«ãŒãåãããã¯ã©ã¹ãšã€ã³ã¿ãŒãã§ã€ã¹ã®ã³ã¬ã¯ã·ã§ã³ã§ãã
73. String ã¯ã©ã¹ãš StringBuffer ã¯ã©ã¹ã®éãã¯äœã§ãã?
匊 |
æååãããã¡ |
Stringã¯ã©ã¹ã¯äžå€ã§ãã |
StringBufferã¯ã©ã¹ã¯å€æŽå¯èœã§ãã |
StringBufferãããé
ãã |
Stringãããé«éã§ãã |
å€ãã®æååãé£çµãããšãããå€ãã®ã¡ã¢ãªã䜿çšãããŸãã |
å€ãã®æååãé£çµãããšãã«äœ¿çšããã¡ã¢ãªãå°ãªããªããŸãã |
74. Java ã§éçã¡ãœããããªãŒããŒããŒãããããšã¯å¯èœã§ãã?
ã¯ããããŸããŸãªé¢æ°ã·ã°ããã£ãæž¡ãããšã§ãJava ã®éçã¡ãœããããªãŒããŒããŒãã§ããŸãã
75.ã¬ããŒãžã³ã¬ã¯ã·ã§ã³äžã«ã¯ãªãŒã³ã¢ãããããã®ã¯ã¡ã¢ãªã®ã©ã®ã³ã³ããŒãã³ããã¹ã¿ãã¯ãŸãã¯ããŒãã§ãã?
ããŒãã
76.ããŒã¿ãé »ç¹ã«æŽæ°ããå¿
èŠãããå Žåã次ã®æååã¯ã©ã¹ã®ãã¡ã©ãã䜿çšããå¿
èŠããããŸãã?
StringBufferã¯ã©ã¹ã¯å€æŽå¯èœã§ãããæååããŒã«ãéè² è·ã«ãªããªããããé »ç¹ã«æŽæ°ããå Žåã«äœ¿çšããå¿
èŠããããŸãã
77. Java ã® main() ã¡ãœãã㧠static ããŒã¯ãŒãã䜿çšãããŠããªãå Žåã¯ã©ããªããŸãã?
ã³ã³ãã€ã« ãšã©ãŒã¯çºçããŸããããå®è¡æã«NoSuchMethodErrorãšã©ãŒãçºçããŸãã
78. try ãããã¯ãš catch ãããã¯ã®æåŸã« return ã¹ããŒãã¡ã³ããé
眮ãããå Žåãfinally ãããã¯ã¯å®è¡ãããŸãã?
ã¯ãã
finallyãããã¯ã¯äŸå€ããããã©ããã«é¢ä¿ãªãåžžã«å®è¡ãããŸãã
79. Java ãœãŒã¹ ãã¡ã€ã«å
ã«å€æ°ã®ãããªã㯠ã¯ã©ã¹ãå«ããããšã¯å¯èœã§ãã?
ããããJava ãœãŒã¹ ãã¡ã€ã«ã«ã¯ãããªã㯠ã¯ã©ã¹ã 1 ã€ã ãå«ããããšãã§ããŸãã
80. ã€ã³ã¿ãŒãã§ãŒã¹ã¯å¥ã®ã€ã³ã¿ãŒãã§ãŒã¹ãæ¡åŒµã§ããŸãã?
ã¯ããJava ã® extends ããŒã¯ãŒãã䜿çšããŠãããã€ã³ã¿ãŒãã§ã€ã¹ãå¥ã®ã€ã³ã¿ãŒãã§ã€ã¹ãæ¡åŒµã§ããŸãã
81. Java ã®ããŸããŸãªã¿ã€ãã®ã¯ã©ã¹ããŒããŒã«ååãä»ããŸã
-
ããŒãã¹ãã©ãã ã¯ã©ã¹ããŒããŒ
-
æ¡åŒµã¯ã©ã¹ããŒããŒ
-
ã·ã¹ãã ã¯ã©ã¹ããŒããŒ
82. Java ã§ã¯äžé
æŒç®åã¯äœãããŸãã?
äžé
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