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  1. ,

    You are trying to deserialize a type for which Jackson does not provide a default mapper. You should create your custom mapper for this type.

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    The easiest solution is to provide a default constructor for the class you want to convert from/to json.

Solutions on the web

via GitHub by Pepejson
, 1 year ago
Can not deserialize instance of java.util.ArrayList out of VALUE_FALSE token at [Source: /Users/Pepejson/Desktop/Development/PokemonGoBot/./bot-settings/default.json; line: 18, column: 21] (through reference chain: ink.abb.pogo.scraper.Settings["followStreets"])
via GitHub by Jacopo1891
, 1 year ago
Can not deserialize instance of java.util.ArrayList out of VALUE_TRUE token at [Source: /home/jacopo/PokemonGoBot/./bot-settings/default.json; line: 18, column: 21] (through reference chain: ink.abb.pogo.scraper.Settings["followStreets"])
via Stack Overflow by Sathish Kumar
, 5 months ago
Can not deserialize instance of java.util.ArrayList out of VALUE_NUMBER_INT token at [Source: 1 2 3; line: 1, column: 1]
via Stack Overflow by James O'Reilly
, 1 year ago
Can not deserialize instance of file.readers.TestAcceptanceCriteria out of START_ARRAY token at [Source: results\acceptanceCriteria.json; line: 1, column: 1]
via Stack Overflow by AnilJ
, 1 month ago
Can not deserialize instance of java.util.LinkedHashMap out of START_ARRAY token at [Source: (File); line: 6, column: 1]
com.fasterxml.jackson.databind.JsonMappingException: Can not deserialize instance of java.util.ArrayList out of VALUE_FALSE token
 at [Source: /Users/Pepejson/Desktop/Development/PokemonGoBot/./bot-settings/default.json; line: 18, column: 21] (through reference chain: ink.abb.pogo.scraper.Settings["followStreets"])	at com.fasterxml.jackson.databind.JsonMappingException.from(JsonMappingException.java:261)	at com.fasterxml.jackson.databind.DeserializationContext.reportMappingException(DeserializationContext.java:1233)	at com.fasterxml.jackson.databind.DeserializationContext.handleUnexpectedToken(DeserializationContext.java:1121)	at com.fasterxml.jackson.databind.DeserializationContext.handleUnexpectedToken(DeserializationContext.java:1074)	at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.handleNonArray(CollectionDeserializer.java:328)	at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:259)	at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:249)	at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:26)	at com.fasterxml.jackson.databind.deser.SettableBeanProperty.deserialize(SettableBeanProperty.java:490)	at com.fasterxml.jackson.databind.deser.BeanDeserializer._deserializeWithErrorWrapping(BeanDeserializer.java:511)	at com.fasterxml.jackson.databind.deser.BeanDeserializer._deserializeUsingPropertyBased(BeanDeserializer.java:396)	at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.deserializeFromObjectUsingNonDefault(BeanDeserializerBase.java:1194)	at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:314)	at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:148)	at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:3789)	at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:2731)	at ink.abb.pogo.scraper.services.BotService.load(BotService.kt:69)	at ink.abb.pogo.scraper.PokemonGoBotApplication$BotRunner$run$$inlined$forEach$lambda$1.invoke(PokemonGoBotApplication.kt:85)	at ink.abb.pogo.scraper.PokemonGoBotApplication$BotRunner$run$$inlined$forEach$lambda$1.invoke(PokemonGoBotApplication.kt:67)	at kotlin.concurrent.ThreadsKt$thread$thread$1.run(Thread.kt:18)