public final class Method extends Executable
Methodã¯ãã¯ã©ã¹ãŸãã¯ã€ã³ã¿ãã§ãŒã¹äžã®åäžã®ã¡ãœããã«é¢ããæ
å ±ãšãã®ã¢ã¯ã»ã¹ãæäŸããŸãã ãªãã¬ã¯ããããã¡ãœããã¯ãã¯ã©ã¹ã»ã¡ãœãããŸãã¯ã€ã³ã¹ã¿ã³ã¹ã»ã¡ãœãã(æœè±¡ã¡ãœãããå«ã)ã«ãªããŸãã
Methodã¯ãå®ãã©ã¡ãŒã¿ãåºã«ãªãã¡ãœããã®ä»®ãã©ã¡ãŒã¿ãšäžèŽãããå Žåã«ãæ¡åŒµå€æãçºçããããšãèš±å¯ããŸãããçž®å°å€æãçºçããå Žåã¯IllegalArgumentExceptionãã¹ããŒããŸãã
| 修食åãšå | ã¡ãœãã | 説æ |
|---|---|---|
boolean |
equals(Object obj) |
ãã®
Methodãæå®ããããªããžã§ã¯ããšæ¯èŒããŸãã |
AnnotatedType |
getAnnotatedReturnType() |
ãã®Executableã«ãã£ãŠè¡šãããã¡ãœãããŸãã¯ã³ã³ã¹ãã©ã¯ã¿ã®æ»ãåãæå®ããåã®äœ¿çšã衚ã
AnnotatedTypeãªããžã§ã¯ããè¿ããŸãã |
<T extends Annotation> |
getAnnotation(Class<T> annotationClass) |
ååšããå Žåã¯ããã®èŠçŽ ã®æå®ãããåã®æ³šéãè¿ããããã§ãªãå Žåã¯nullãè¿ããŸãã
|
Annotation[] |
getDeclaredAnnotations() |
ãã®èŠçŽ ã«çŽæ¥ååšããæ³šéãè¿ããŸãã
|
Class<?> |
getDeclaringClass() |
ãã®ãªããžã§ã¯ãã«ãã£ãŠè¡šãããå®è¡å¯èœãã¡ã€ã«ã宣èšããã¯ã©ã¹ãŸãã¯ã€ã³ã¿ãã§ãŒã¹ã衚ã
Classãªããžã§ã¯ããè¿ããŸãã |
Object |
getDefaultValue() |
ãã®
Methodã€ã³ã¹ã¿ã³ã¹ã«ãã衚ãããæ³šéã¡ã³ããŒã®ããã©ã«ãå€ãè¿ããŸãã |
Class<?>[] |
getExceptionTypes() |
ãã®ãªããžã§ã¯ãã§è¡šãããåºç€ãšãªãå®è¡å¯èœãã¡ã€ã«ã«ãã£ãŠã¹ããŒãããããã«å®£èšãããŠããäŸå€ã®åã衚ã
Classãªããžã§ã¯ãã®é
åãè¿ããŸãã |
Type[] |
getGenericExceptionTypes() |
ãã®executableãªããžã§ã¯ãã«ãã£ãŠã¹ããŒãããããšã宣èšãããŠããäŸå€ã衚ã
Typeãªããžã§ã¯ãã®é
åãè¿ããŸãã |
Type[] |
getGenericParameterTypes() |
ãã®ãªããžã§ã¯ãã«ãã£ãŠè¡šãããå®è¡å¯èœèŠçŽ ã®ä»®ãã©ã¡ãŒã¿åã宣èšé ã§è¡šã
Typeãªããžã§ã¯ãã®é
åãè¿ããŸãã |
Type |
getGenericReturnType() |
ãã®
Methodãªããžã§ã¯ãã«ãã£ãŠè¡šãããã¡ãœããã®ä»®ã®æ»ãå€ã®åã衚ãTypeãªããžã§ã¯ããè¿ããŸãã |
int |
getModifiers() |
ãã®ãªããžã§ã¯ãã«ãã£ãŠè¡šãããå®è¡å¯èœèŠçŽ ã®Javaèšèªä¿®é£Ÿåãè¿ããŸãã
|
String |
getName() |
Methodãªããžã§ã¯ãã«ãã£ãŠè¡šãããã¡ãœããã®ååãStringãšããŠè¿ããŸãã |
Annotation[][] |
getParameterAnnotations() |
ãã®ãªããžã§ã¯ãã«ãã£ãŠè¡šããã
Executableã®ä»®ãã©ã¡ãŒã¿ã®æ³šéã衚ãAnnotationã®é
åã®é
åãã宣èšé ã«è¿ããŸãã |
int |
getParameterCount() |
ãã®ãªããžã§ã¯ãã«ãã£ãŠè¡šãããå®è¡å¯èœèŠçŽ ã®ä»®ãã©ã¡ãŒã¿(æç€ºçã«å®£èšãããŠããããæé»çã«å®£èšãããŠãããããã®ãããã§ããªããã«é¢ä¿ãªã)ã®æ°ãè¿ããŸãã
|
Class<?>[] |
getParameterTypes() |
ãã®ãªããžã§ã¯ãã«ãã£ãŠè¡šãããå®è¡å¯èœãã¡ã€ã«ã®ä»®ãã©ã¡ãŒã¿åã宣èšé ã§è¡šã
Classãªããžã§ã¯ãã®é
åãè¿ããŸãã |
Class<?> |
getReturnType() |
ãã®
Methodãªããžã§ã¯ãã«ãã£ãŠè¡šãããã¡ãœããã®ä»®ã®æ»ãå€ã®åã衚ãClassãªããžã§ã¯ããè¿ããŸãã |
TypeVariable<Method>[] |
getTypeParameters() |
GenericDeclarationãªããžã§ã¯ãã«ãã£ãŠè¡šããããžã§ããªãã¯å®£èšã§å®£èšãããå倿°ã衚ãTypeVariableãªããžã§ã¯ãã®é
åã宣èšé ã«è¿ããŸãã |
int |
hashCode() |
ãã®
Methodã®ããã·ã¥ã»ã³ãŒããè¿ããŸãã |
Object |
invoke(Object obj, Object... args) |
ãã®
Methodãªããžã§ã¯ãã«ãã£ãŠè¡šãããåºæ¬ãšãªãã¡ãœããããæå®ãããªããžã§ã¯ãã«å¯ŸããŠæå®ãããã©ã¡ãŒã¿ã§åŒã³åºããŸãã |
boolean |
isBridge() |
ãã®ã¡ãœãããããªããžã»ã¡ãœããã§ããå Žåã¯
trueãè¿ããããã§ãªãå Žåã¯falseãè¿ããŸãã |
boolean |
isDefault() |
ãã®ã¡ãœãããããã©ã«ãã»ã¡ãœããã§ããå Žåã¯
trueãè¿ããããã§ãªãå Žåã¯falseãè¿ããŸãã |
boolean |
isSynthetic() |
ãã®å®è¡å¯èœèŠçŽ ãåææ§é ã§ããå Žåã¯
trueãè¿ããããã§ãªãå Žåã¯falseãè¿ããŸãã |
boolean |
isVarArgs() |
ãã®å®è¡å¯èœèŠçŽ ãå¯å€æ°ã®åŒæ°ãåãããã«å®£èšãããŠããå Žåã¯
trueãè¿ããããã§ãªãå Žåã¯falseãè¿ããŸãã |
String |
toGenericString() |
åãã©ã¡ãŒã¿ãå«ãããã®
Methodãèšè¿°ããæååãè¿ããŸãã |
String |
toString() |
ãã®
Methodãèšè¿°ããæååãè¿ããŸãã |
getAnnotatedExceptionTypes, getAnnotatedParameterTypes, getAnnotatedReceiverType, getAnnotationsByType, getParametersgetAnnotations, getDeclaredAnnotation, getDeclaredAnnotationsByType, isAccessible, isAnnotationPresent, setAccessible, setAccessibleclone, finalize, getClass, notify, notifyAll, wait, wait, waitgetAnnotations, getDeclaredAnnotation, getDeclaredAnnotationsByType, isAnnotationPresentpublic Class<?> getDeclaringClass()
Classãªããžã§ã¯ããè¿ããŸããgetDeclaringClassãã€ã³ã¿ãã§ãŒã¹MembergetDeclaringClassãã¯ã©ã¹Executablepublic String getName()
Methodãªããžã§ã¯ãã«ãã£ãŠè¡šãããã¡ãœããã®ååãStringãšããŠè¿ããŸããgetNameãã€ã³ã¿ãã§ãŒã¹MembergetNameãã¯ã©ã¹Executablepublic int getModifiers()
getModifiersãã€ã³ã¿ãã§ãŒã¹MembergetModifiersãã¯ã©ã¹ExecutableModifierpublic TypeVariable<Method>[] getTypeParameters()
GenericDeclarationãªããžã§ã¯ãã«ãã£ãŠè¡šããããžã§ããªãã¯å®£èšã§å®£èšãããå倿°ã衚ãTypeVariableãªããžã§ã¯ãã®é
åã宣èšé ã«è¿ããŸãã åºã«ãªããžã§ããªãã¯å®£èšã§å倿°ã宣èšãããŠããªãå Žåã¯ãé·ã0ã®é
åãè¿ãããŸãã getTypeParametersãã€ã³ã¿ãã§ãŒã¹GenericDeclarationgetTypeParametersãã¯ã©ã¹ExecutableTypeVariableãªããžã§ã¯ãã®é
åGenericSignatureFormatError - ãã®ãžã§ããªãã¯å®£èšã®ãžã§ããªãã¯ã»ã·ã°ããã£ããJavaâ¢ä»®æ³ãã·ã³ä»æ§ãã§èŠå®ãããæžåŒã«é©åããªãå Žåpublic Class<?> getReturnType()
Methodãªããžã§ã¯ãã«ãã£ãŠè¡šãããã¡ãœããã®ä»®ã®æ»ãå€ã®åã衚ãClassãªããžã§ã¯ããè¿ããŸããpublic Type getGenericReturnType()
Methodãªããžã§ã¯ãã«ãã£ãŠè¡šãããã¡ãœããã®ä»®ã®æ»ãå€ã®åã衚ãTypeãªããžã§ã¯ããè¿ããŸãã
æ»ãå€ã®åãããã©ã¡ãŒã¿åãããåã®å Žåãè¿ãããTypeãªããžã§ã¯ãã¯ããœãŒã¹ã»ã³ãŒãã§äœ¿çšãããå®éã®åãã©ã¡ãŒã¿ãæ£ç¢ºã«åæ ããªããã°ãããŸããã
æ»ãå€ã®åããå倿°ãŸãã¯ãã©ã¡ãŒã¿åãããåã®å Žåãæ»ãå€ã®åã¯äœæãããŸãã ããã§ãªãå ŽåãäŸå€ã¿ã€ãã¯è§£æ±ºãããŸãã
Typeãªããžã§ã¯ãGenericSignatureFormatError - ãžã§ããªãã¯ã»ã¡ãœããã®ã·ã°ããã£ããJavaâ¢ä»®æ³ãã·ã³ä»æ§ãã§èŠå®ãããæžåŒã«é©åããªãå ŽåTypeNotPresentException - åºæ¬ãšãªãã¡ãœããã®æ»ãå€ã®åãååšããªãå宣èšãåç
§ããå ŽåMalformedParameterizedTypeException - åºæ¬ãšãªãã¡ãœããã®æ»ãå€ã®åãããªãããã®çç±ã«ããã€ã³ã¹ã¿ã³ã¹åã§ããªããã©ã¡ãŒã¿åãããåãåç
§ããå Žåpublic Class<?>[] getParameterTypes()
Classãªããžã§ã¯ãã®é
åãè¿ããŸãã åºç€ãšãªãå®è¡å¯èœèŠçŽ ã«ãã©ã¡ãŒã¿ãèšå®ãããŠããªãå Žåã«ã¯ãé·ã0ã®é
åãè¿ãããŸãã getParameterTypesãã¯ã©ã¹Executablepublic int getParameterCount()
getParameterCountãã¯ã©ã¹Executablepublic Type[] getGenericParameterTypes()
Typeãªããžã§ã¯ãã®é
åãè¿ããŸãã åºç€ãšãªãå®è¡å¯èœèŠçŽ ã«ãã©ã¡ãŒã¿ãèšå®ãããŠããªãå Žåã«ã¯ãé·ã0ã®é
åãè¿ãããŸãã
ä»®ãã©ã¡ãŒã¿åãããã©ã¡ãŒã¿åãããåã®å Žåãè¿ãããTypeãªããžã§ã¯ãã¯ããœãŒã¹ã»ã³ãŒãã§äœ¿çšãããå®éã®åãã©ã¡ãŒã¿ãæ£ç¢ºã«åæ ããªããã°ãããŸããã
ä»®ãã©ã¡ãŒã¿åããå倿°ãŸãã¯ãã©ã¡ãŒã¿åãããåã®å Žåãä»®ãã©ã¡ãŒã¿åã¯äœæãããŸãã ããã§ãªãå ŽåãäŸå€ã¿ã€ãã¯è§£æ±ºãããŸãã
getGenericParameterTypesãã¯ã©ã¹ExecutableTypeã®é
åGenericSignatureFormatError - ãžã§ããªãã¯ã»ã¡ãœããã®ã·ã°ããã£ããJavaâ¢ä»®æ³ãã·ã³ä»æ§ãã§èŠå®ãããæžåŒã«é©åããªãå ŽåTypeNotPresentException - åºç€ãšãªãå®è¡å¯èœèŠçŽ ã®ãã©ã¡ãŒã¿åã®ããããããååšããªãå宣èšãåç
§ããå ŽåMalformedParameterizedTypeException - åºç€ãšãªãå®è¡å¯èœèŠçŽ ã®ãã©ã¡ãŒã¿åã®ãããããããªãããã®çç±ã«ããã€ã³ã¹ã¿ã³ã¹åã§ããªããã©ã¡ãŒã¿åãããåãåç
§ããå Žåpublic Class<?>[] getExceptionTypes()
Classãªããžã§ã¯ãã®é
åãè¿ããŸãã å®è¡å¯èœèŠçŽ ãthrowsç¯ã§äŸå€ã宣èšããŠããªãå Žåã¯ãé·ã0ã®é
åãè¿ããŸãã getExceptionTypesãã¯ã©ã¹Executablepublic Type[] getGenericExceptionTypes()
Typeãªããžã§ã¯ãã®é
åãè¿ããŸãã åºç€ãšãªãå®è¡å¯èœèŠçŽ ãthrowsç¯ã§äŸå€ã宣èšããŠããªãå Žåã¯ãé·ã0ã®é
åãè¿ããŸãã
äŸå€ã¿ã€ãããå倿°ãŸãã¯ãã©ã¡ãŒã¿åãããåã®å ŽåãäŸå€ã¿ã€ãã¯äœæãããŸãã ããã§ãªãå ŽåãäŸå€ã¿ã€ãã¯è§£æ±ºãããŸãã
getGenericExceptionTypesãã¯ã©ã¹ExecutableGenericSignatureFormatError - ãžã§ããªãã¯ã»ã¡ãœããã®ã·ã°ããã£ããJavaâ¢ä»®æ³ãã·ã³ä»æ§ãã§èŠå®ãããæžåŒã«é©åããªãå ŽåTypeNotPresentException - åºç€ãšãªãå®è¡å¯èœèŠçŽ ã®throwsç¯ãååšããªãå宣èšãåç
§ããå ŽåMalformedParameterizedTypeException - åºç€ãšãªãå®è¡å¯èœèŠçŽ ã®throwsç¯ãããªãããã®çç±ã«ããã€ã³ã¹ã¿ã³ã¹åã§ããªããã©ã¡ãŒã¿åãããåãåç
§ããå Žåpublic boolean equals(Object obj)
Methodãæå®ããããªããžã§ã¯ããšæ¯èŒããŸãã ãªããžã§ã¯ããåãå Žåã«ã¯trueãè¿ããŸãã 2ã€ã®Methodã¯ãåãã¯ã©ã¹ã§å®£èšãããåãååãä»®ãã©ã¡ãŒã¿åãããã³æ»ãå€ã®åãä¿æããå Žåã«åãã«ãªããŸãã equalsãã¯ã©ã¹Objectobj - æ¯èŒå¯Ÿè±¡ã®åç
§ãªããžã§ã¯ããtrueããã以å€ã®å Žåã¯falseãObject.hashCode()ãHashMappublic int hashCode()
Methodã®ããã·ã¥ã»ã³ãŒããè¿ããŸãã ããã¯ãåºæ¬ãšãªãã¡ãœããã®å®£èšã¯ã©ã¹åãšãã®ã¡ãœããåã®ããã·ã¥ã»ã³ãŒãã®æä»çè«çåãšããŠèšç®ãããŸãã hashCodeãã¯ã©ã¹ObjectObject.equals(java.lang.Object), System.identityHashCode(java.lang.Object)public String toString()
Methodãèšè¿°ããæååãè¿ããŸãã ãã®æååã®æžåŒã¯ãååšããå Žåã¯ã¡ãœããã®ã¢ã¯ã»ã¹ä¿®é£Ÿåãã¡ãœããã®æ»ãå€åã空çœãã¡ãœããã宣èšããã¯ã©ã¹ãããªãªããã¡ãœããåãã«ãã³ã§å²ãŸããã«ã³ãåºåãã®ã¡ãœããã®ä»®ãã©ã¡ãŒã¿åãªã¹ããé çªã«ç¶ããŸãã ã¡ãœããããã§ãã¯æžã¿ã®äŸå€ãã¹ããŒããå Žåããã©ã¡ãŒã¿ã»ãªã¹ãã«ã¯ã空çœãã¹ããŒããã¯ãŒããã¹ããŒãããäŸå€ã¿ã€ãã®ã«ã³ãåºåãã®ãªã¹ããé çªã«ç¶ããŸãã ããšãã°ã
public boolean java.lang.Object.equals(java.lang.Object)
ã¢ã¯ã»ã¹ä¿®é£Ÿåã¯ããJavaèšèªä»æ§ãã§èŠå®ãããæ£èŠã®é åºã§æ ŒçŽãããŸãã ããã¯ãpublicãprotectedããŸãã¯privateããŸãé
眮ãããæ¬¡ã«ã»ãã®ä¿®é£Ÿåãæ¬¡ã®é åºã§ç¶ããŸã: abstractãdefaultãstaticãfinalãsynchronizedãnativeãstrictfpã
public String toGenericString()
Methodãèšè¿°ããæååãè¿ããŸãã ãã®æååã®æžåŒã¯ã(ååšããå Žåã«ã¯)ã¡ãœããã®ã¢ã¯ã»ã¹ä¿®é£Ÿåãå±±ã«ãã³ã§å²ãŸããã«ã³ãåºåãã®ã¡ãœããã®åãã©ã¡ãŒã¿ã»ãªã¹ããã¡ãœããã®ãžã§ããªãã¯æ»ãå€åã空çœãã¡ãœããã宣èšããã¯ã©ã¹ãããªãªããã¡ãœããåãã«ãã³ã§å²ãŸããã«ã³ãåºåãã®ã¡ãœããã®ãžã§ããªãã¯ä»®ãã©ã¡ãŒã¿åã®ãªã¹ããé çªã«ç¶ããŸãã ãã®ã¡ãœãããå¯å€æ°ã®åŒæ°ãåãããã«å®£èšãããŠããå Žåã¯ãæåŸã®ãã©ã¡ãŒã¿ã"Type[]"ãšããŠç€ºãããã®ã§ã¯ãªãã"Type..."ãšããŠç€ºãããŸãã ã¢ã¯ã»ã¹ä¿®é£Ÿåå士ãããã³ã¢ã¯ã»ã¹ä¿®é£Ÿåãšåãã©ã¡ãŒã¿ãæ»ãå€ãšã®åºåãã«ã¯ç©ºçœæåã䜿çšãããŸãã åãã©ã¡ãŒã¿ããªãå Žåãåãã©ã¡ãŒã¿ã®ãªã¹ãã¯çç¥ãããŸããåãã©ã¡ãŒã¿ã®ãªã¹ããååšããå Žåããªã¹ããšã¯ã©ã¹åã¯ç©ºçœæåã§åºåãããŸãã ã¡ãœãããäŸå€ãã¹ããŒããããã«å®£èšãããŠããå Žåããã©ã¡ãŒã¿ã®ãªã¹ãã®ããšã«ç©ºçœããthrowsããšããæååãã¹ããŒããããžã§ããªãã¯äŸå€åã®ã«ã³ãåºåãã®ãªã¹ããé çªã«ç¶ããŸãã
ã¢ã¯ã»ã¹ä¿®é£Ÿåã¯ããJavaèšèªä»æ§ãã§èŠå®ãããæ£èŠã®é åºã§æ ŒçŽãããŸãã ããã¯ãpublicãprotectedããŸãã¯privateããŸãé
眮ãããæ¬¡ã«ã»ãã®ä¿®é£Ÿåãæ¬¡ã®é åºã§ç¶ããŸã: abstractãdefaultãstaticãfinalãsynchronizedãnativeãstrictfpã
toGenericStringãã¯ã©ã¹ExecutableMethodãèšè¿°ããæååpublic Object invoke(Object obj, Object... args) throws IllegalAccessException, IllegalArgumentException, InvocationTargetException
Methodãªããžã§ã¯ãã«ãã£ãŠè¡šãããåºæ¬ãšãªãã¡ãœããããæå®ãããªããžã§ã¯ãã«å¯ŸããŠæå®ãããã©ã¡ãŒã¿ã§åŒã³åºããŸãã åå¥ã®ãã©ã¡ãŒã¿ã¯ãããªããã£ãä»®ãã©ã¡ãŒã¿ãšäžèŽãããããã«èªåçã«ã©ããè§£é€ãããããªããã£ãããã³åç
§ãã©ã¡ãŒã¿ã¯äž¡æ¹ãšãå¿
èŠã«å¿ããŠã¡ãœããåŒåºã倿ã®å¯Ÿè±¡ã«ãªããŸãã
åºæ¬ãšãªãã¡ãœãããstaticã®å Žåãæå®ãããobjåŒæ°ã¯ç¡èŠãããŸãã nullãæå®ã§ããŸãã
åºæ¬ãšãªãã¡ãœããã«ãã£ãŠèŠæ±ãããä»®ãã©ã¡ãŒã¿æ°ã0ã®å Žåãæå®ãããargsé
åã¯é·ã0ãŸãã¯nullã«ãªããŸãã
åºæ¬ãšãªãã¡ãœãããã€ã³ã¹ã¿ã³ã¹ã»ã¡ãœããã®å Žåãåçã¡ãœããã»ã«ãã¯ã¢ããã䜿çšããŠåŒåºããè¡ãããã¿ãŒã²ããã»ãªããžã§ã¯ãã®å®è¡æã®åã«åºã¥ããŠãªãŒããŒã©ã€ããå®è¡ãããŸã(ãJavaèšèªä»æ§ã第2çãã®ã»ã¯ã·ã§ã³15.12.4.4ãåç §)ã
åºæ¬ãšãªãã¡ãœãããstaticã®å Žåãã¡ãœããã宣èšããã¯ã©ã¹ããŸã åæåãããŠããªããšãã¯ããã®ã¯ã©ã¹ãåæåãããŸãã
ã¡ãœãããæ£åžžã«å®äºãããšãã¡ãœããã®è¿ãå€ãåŒåºãåŽã«è¿ãããŸãããã®å€ãããªããã£ãåã®å Žåãæåã«ãªããžã§ã¯ãå ã«é©åãªæ¹æ³ã§ã©ãããããŸãã ãã ããå€ãããªããã£ãåã®é ååãæã€å Žåããã®é åã®èŠçŽ ã¯ãªããžã§ã¯ãã«ã©ãããããŸãããã€ãŸããããªããã£ãåã®é åãè¿ãããŸãã åºæ¬ãšãªãã¡ãœããã®æ»ãå€ã®åãvoidã®å ŽåãåŒåºãã¯nullãè¿ããŸãã
obj - åºæ¬ãšãªãã¡ãœããã®åŒåºãå
ã®ãªããžã§ã¯ãargs - ã¡ãœããåŒåºãã«äœ¿çšãããåŒæ°argsã䜿çšããŠobjã«ãã£ã¹ãããããçµæIllegalAccessException - ãã®Methodãªããžã§ã¯ããJavaèšèªã¢ã¯ã»ã¹å¶åŸ¡ã宿œããŠãããåºæ¬ãšãªãã¡ãœããã«ã¢ã¯ã»ã¹ã§ããªãå ŽåãIllegalArgumentException - ã¡ãœãããã€ã³ã¹ã¿ã³ã¹ã»ã¡ãœããã§ãããæå®ããããªããžã§ã¯ãåŒæ°ãåºæ¬ãšãªãã¡ãœãã(ãŸãã¯ãã®ãµãã¯ã©ã¹ãå®è£
åŽ)ã宣èšããã¯ã©ã¹ãŸãã¯ã€ã³ã¿ãã§ãŒã¹ã®ã€ã³ã¹ã¿ã³ã¹ã§ã¯ãªãå Žåãå®ãã©ã¡ãŒã¿æ°ãšä»®ãã©ã¡ãŒã¿æ°ãç°ãªãå Žåãããªããã£ãåŒæ°ã®ã©ããè§£é€å€æã倱æããå ŽåããŸãã¯ã©ããè§£é€åŸãã¡ãœããåŒåºã倿ã«ãã£ãŠãã©ã¡ãŒã¿å€ã察å¿ããä»®ãã©ã¡ãŒã¿åã«å€æã§ããªãå ŽåãInvocationTargetException - åºæ¬ãšãªãã¡ãœãããäŸå€ãã¹ããŒããå ŽåãNullPointerException - æå®ããããªããžã§ã¯ããnullã§ãã¡ãœãããã€ã³ã¹ã¿ã³ã¹ã»ã¡ãœããã®å ŽåãExceptionInInitializerError - ãã®ã¡ãœããã«ããåæåã«å€±æããå Žåãpublic boolean isBridge()
trueãè¿ããããã§ãªãå Žåã¯falseãè¿ããŸããpublic boolean isVarArgs()
trueãè¿ããããã§ãªãå Žåã¯falseãè¿ããŸããisVarArgsãã¯ã©ã¹Executabletrueãpublic boolean isSynthetic()
trueãè¿ããããã§ãªãå Žåã¯falseãè¿ããŸããisSyntheticãã€ã³ã¿ãã§ãŒã¹MemberisSyntheticãã¯ã©ã¹Executablepublic boolean isDefault()
trueãè¿ããããã§ãªãå Žåã¯falseãè¿ããŸãã ããã©ã«ãã»ã¡ãœããã¯ãpublicã®éabstractã€ã³ã¹ã¿ã³ã¹ã»ã¡ãœããã§ããã€ãŸããã€ã³ã¿ãã§ãŒã¹åã§å®£èšãããŠãããæ¬äœãæã€éstaticã¡ãœããã§ãã public Object getDefaultValue()
Methodã€ã³ã¹ã¿ã³ã¹ã«ãã衚ãããæ³šéã¡ã³ããŒã®ããã©ã«ãå€ãè¿ããŸãã ããªããã£ãåã®ã¡ã³ããŒã®å Žåã察å¿ããã©ãããŒåã®ã€ã³ã¹ã¿ã³ã¹ãè¿ãããŸãã ã¡ã³ããŒã«ããã©ã«ãå€ãé¢é£ä»ããããŠããªãå ŽåããŸãã¯ã¡ãœããã»ã€ã³ã¹ã¿ã³ã¹ã泚éåã®å®£èšãããã¡ã³ããŒã衚ããªãå Žåã¯nullãè¿ããŸãã Methodã€ã³ã¹ã¿ã³ã¹ã«ãã衚ãããæ³šéã¡ã³ããŒã®ããã©ã«ãå€ãTypeNotPresentException - 泚éãClassåã®å Žåã§ãããã©ã«ãã®ã¯ã©ã¹å€ã®å®çŸ©ãèŠã€ãããªãå Žåãpublic <T extends Annotation> T getAnnotation(Class<T> annotationClass)
getAnnotationãã€ã³ã¿ãã§ãŒã¹AnnotatedElementgetAnnotationãã¯ã©ã¹ExecutableT - ç
§äŒããååšããå Žåã«è¿ã泚éã®åãannotationClass - 泚éåã«å¯Ÿå¿ããClassãªããžã§ã¯ãNullPointerException - æå®ãããæ³šéã¯ã©ã¹ãnullã®å Žåpublic Annotation[] getDeclaredAnnotations()
getDeclaredAnnotationsãã€ã³ã¿ãã§ãŒã¹AnnotatedElementgetDeclaredAnnotationsãã¯ã©ã¹Executablepublic Annotation[][] getParameterAnnotations()
Executableã®ä»®ãã©ã¡ãŒã¿ã®æ³šéã衚ãAnnotationã®é
åã®é
åãã宣èšé ã«è¿ããŸãã è¿ãããé
åã§ã¯ãå
éšã¯ã©ã¹ã»ã³ã³ã¹ãã©ã¯ã¿ã«å¯Ÿããå€éšã®thisãã©ã¡ãŒã¿ãªã©ãåæããã³å¿
é ãã©ã¡ãŒã¿(次ã®èª¬æãåç
§)ã衚ãããŸãã å®è¡å¯èœèŠçŽ ããã©ã¡ãŒã¿ãæããªã(ã€ãŸããä»®ãã©ã¡ãŒã¿ãåæãã©ã¡ãŒã¿ãå¿
é ãã©ã¡ãŒã¿ãæããªã)å Žåã¯ãé·ã0ã®é
åãè¿ãããŸãã å®è¡å¯èœèŠçŽ ã«1ã€ä»¥äžã®ãã©ã¡ãŒã¿ãããå Žåãæ³šéãå«ãŸãªããã©ã¡ãŒã¿ããšã«é·ããŒãã®å
¥ãåã®é
åãè¿ããŸãã è¿ãããé
åã«å«ãŸããæ³šéãªããžã§ã¯ãã¯çŽååã§ããŸãã ãã®ã¡ãœããã®åŒåºãå
ã¯ãè¿ãããé
åãèªç±ã«å€æŽã§ããŸãããã®å€æŽã¯ãã»ãã®åŒåºãå
ã«è¿ãããé
åã«åœ±é¿ãåãŒããŸããã ã³ã³ãã€ã©ã«ãã£ãŠããœãŒã¹ã§æé»çã«å®£èšãããŠãã远å ã®ãã©ã¡ãŒã¿("å¿
é ")ãããã³ãœãŒã¹ã§æé»çã«ãæç€ºçã«ã宣èšãããŠããªããã©ã¡ãŒã¿("åæ")ãã¡ãœããã®ãã©ã¡ãŒã¿ã»ãªã¹ãã«è¿œå ãããããšããããŸãã 詳现ã¯ãParameterãåç
§ããŠãã ããã getParameterAnnotationsãã¯ã©ã¹ExecutableParameter, Parameter.getAnnotations()public AnnotatedType getAnnotatedReturnType()
AnnotatedTypeãªããžã§ã¯ããè¿ããŸãã ãã®Executableãªããžã§ã¯ããã³ã³ã¹ãã©ã¯ã¿ã衚ãå ŽåãAnnotatedTypeãªããžã§ã¯ãã¯æ§ç¯ããããªããžã§ã¯ãã®åã衚ããŸãã ãã®Executableãªããžã§ã¯ããã¡ãœããã衚ãå ŽåãAnnotatedTypeãªããžã§ã¯ãã¯ã¡ãœããã®æ»ãåãæå®ããåã®äœ¿çšã衚ããŸãã getAnnotatedReturnTypeãã¯ã©ã¹ExecutableExecutableã衚ãã¡ãœãããŸãã¯ã³ã³ã¹ãã©ã¯ã¿ã®æ»ãåã衚ããªããžã§ã¯ã ãã°ãŸãã¯æ©èœãéä¿¡
詳现ãªAPIãªãã¡ã¬ã³ã¹ããã³éçºè
ããã¥ã¡ã³ãã«ã€ããŠã¯ãJava SEã®ããã¥ã¡ã³ããåç
§ããŠãã ããã ãã®ããã¥ã¡ã³ãã«ã¯ãæŠå¿µçãªæŠèŠãçšèªã®å®çŸ©ãåé¿æ¹æ³ãæå¹ãªã³ãŒãäŸãªã©ã®ãéçºè
ã察象ã«ãããã詳现ãªèª¬æãå«ãŸããŠããŸãã
Copyright © 1993, 2025, Oracle and/or its affiliates. All rights reserved. Use is subject to license terms. Documentation Redistribution Policyãåç
§ããŠãã ããã