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java中arraylist命名空间是什么

Java中没有命名空间的概念，ArrayList是java.util包中的一个类。Java中没有命名空间的概念，但是可以使用包名来进行区分。例如，如果你想使用ArrayList类，可以通过导入java.util包来实现：```importjava.util.ArrayList;```然后就可以在代码中直接使用Array...

开发笔记·2024-01-29

ORA-32039: recursive WITH clause must have column alias list

文档解释ORA-32039:recursiveWITHclausemusthavecolumnaliaslistCause:AWITHclausequeryreferredtoitself(recursive)butdidnothaveacolumnaliaslistspecifiedforit.Action:Adda...

IT技术学习·2023-07-28

ORA-24101: stopped processing the argument list at: string

文档解释ORA-24101:stoppedprocessingtheargumentlistat:stringCause:Oneoftheargumentsoftherequestedoperationcontainedalistofschedulerobjects.Whileprocessingthislistane...

IT技术学习·2023-07-28

ORA-48938: View select column count differs from select alias list

文档解释ORA-48938:ViewselectcolumncountdiffersfromselectaliaslistCause:Theviewaliaslisthasadifferentnumberoffieldsthantheselectlist”Action:Changethealiaslisto...

IT技术学习·2023-07-28

ORA-22900: the SELECT list item of THE subquery is not a collection type

文档解释ORA-22900:theSELECTlistitemofTHEsubqueryisnotacollectiontypeCause:TheTHEsubquerymustSELECTanestedtableorVARRAYitem.Action:changethesubquerytoSELECTanestedta...

IT技术学习·2023-07-28

ORA-32048: cycle mark column name for CYCLE clause must not be part of the column alias list

文档解释ORA-32048:cyclemarkcolumnnameforCYCLEclausemustnotbepartofthecolumnaliaslistCause:TheCYCLEclauseforarecursiveWITHqueryspecifiedacyclemarkcolumnthatwasalread...

IT技术学习·2023-07-28

ORA-12508: TNS:listener could not resolve the COMMAND given

文档解释ORA-12508:TNS:listenercouldnotresolvetheCOMMANDgivenCause:dbyincompatibleOracleNetorNet8versions.Donotincludeinerrormanual.Action:Thisisnotseeninnormaluseof...

IT技术学习·2023-07-28

ORA-30363: columns in a dimension column list must be in the same relation

文档解释ORA-30363:columnsinadimensioncolumnlistmustbeinthesamerelationCause:Thedimensionstatementcontainedacolumnlistwherethecolumnsarenotallfromthesamerelation.Act...

IT技术学习·2023-07-28

ORA-25252: listen failed, the address string is a non-persistent queue

文档解释ORA-25252:listenfailed,theaddressstringisanon-persistentqueueCause:Anon-persistentqueuewasspecifiedasanaddressforanagentintheLISTENcall.Action:Specifyanorma...

IT技术学习·2023-07-28

ORA-14309: Total count of list values exceeds maximum allowed

文档解释ORA-14309:TotalcountoflistvaluesexceedsmaximumallowedCause:Partitionedobjectcontainsmorethan524288listvaluesAction:Reducenumberofvaluestolessthan524288.ORA-...

IT技术学习·2023-07-27

ORA-32046: sequence column name for SEARCH clause must not be part of the column alias list

文档解释ORA-32046:sequencecolumnnameforSEARCHclausemustnotbepartofthecolumnaliaslistCause:TheSEARCHclauseforarecursiveWITHqueryspecifiedasequencecolumnthatwasalread...

IT技术学习·2023-07-27

ORA-24160: name string already exists in the name value pair list

文档解释ORA-24160:namestringalreadyexistsinthenamevaluepairlistCause:thereisalreadyaname-valuepairwiththesamenameintheNVlistAction:tryanothername.ORA-24160错误提示，名称字符...

IT技术学习·2023-07-27

ORA-14206: table is not subpartitioned by List or Range methods

文档解释ORA-14206:tableisnotsubpartitionedbyListorRangemethodsCause:AsubpartitionmaintenanceoperationsuchasALTERTABLEDROP|SPLIT|MERGESUBPARTITIONcanonlybeperformedo...

IT技术学习·2023-07-27

ORA-13651: The specified list of execution parameters is invalid.

文档解释ORA-13651:Thespecifiedlistofexecutionparametersisinvalid.Cause:Thelistdidnotincludepairsof(parameter_name,parameter_value)whereeveryparameterisavalidetaskpa...

IT技术学习·2023-07-26

ORA-38463: invalid XML Tag list

文档解释ORA-38463:invalidXMLTaglistCause:Theinputwasmissingataglistorhadnullvaluesforthetagnames.Action:Correcttheinput.ORA-38463错误代表XML标签列表中含有无效标签。官方解释ORA-38463是一个...

IT技术学习·2023-07-26