Jackson JsonMappingException: Can not deserialize instance

Question

I'm trying to convert my json data to a POJO object using Jackson. Here is the MainActivity and my POJO class code. I'm basically getting a JsonMappingException error. I have also attached the whole log. MainActivity.java : ``` ObjectMapper mapper = new ObjectMapper(); mapper.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES); try { List results = mapper.readValue(new URL("http://collegewires.com/android/jacksoncw.json"), new TypeReference>(){}); for(int i=0;i

Accepted Answer

Remove the Constructor in Entries & Phone `GetEntries results = mapper.readValue(new URL("http://collegewires.com/android/jacksoncw.json"), GetEntries.class);` Entries seems to be a parameter in your JSON. GetEntries.java ``` package com.collegewires.jackson; import java.util.List; public class GetEntries{ private List entries; public List getEntries(){ return this.entries; } public void setEntries(List entries){ this.entries = entries; } } ``` Entries.java ``` package com.collegewires.jackson; import java.util.List; public class Entries{ private String address; private String email; private String gender; private String id; private String name; private Phone phone; public String getAddress(){ return this.address; } public void setAddress(String address){ this.address = address; } public String getEmail(){ return this.email; } public void setEmail(String email){ this.email = email; } public String getGender(){ return this.gender; } public void setGender(String gender){ this.gender = gender; } public String getId(){ return this.id; } public void setId(String id){ this.id = id; } public String getName(){ return this.name; } public void setName(String name){ this.name = name; } public Phone getPhone(){ return this.phone; } public void setPhone(Phone phone){ this.phone = phone; } } ``` Phone.java ``` package com.collegewires.jackson; import java.util.List; public class Phone{ private String home; private String mobile; private String office; public String getHome(){ return this.home; } public void setHome(String home){ this.home = home; } public String getMobile(){ return this.mobile; } public void setMobile(String mobile){ this.mobile = mobile; } public String getOffice(){ return this.office; } public void setOffice(String office){ this.office = office; } } ```

Jackson JsonMappingException: Can not deserialize instance

Solution

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