The method parseString(String) is undefined for the type JsonParser

Question

My code was working perfectly before but now it is throwing out an exception,

The code :

    Gson gson = new GsonBuilder().setPrettyPrinting().create();
            JsonElement jsonElement = JsonParser.parseString(resultJsonString);

and the exception in the line JsonElement jsonElement = JsonParser.parseString(resultJsonString);

Exception in thread "main" java.lang.Error: Unresolved compilation problem: 
    The method parseString(String) is undefined for the type JsonParser

Any hints to why this is happening? It was working fine till yesterday!

These are the imports, import com.google.gson.Gson; import com.google.gson.GsonBuilder; import com.google.gson.JsonElement; import com.google.gson.JsonObject; import com.google.gson.JsonParser; — SharadxDutta, Aug 27 '20 at 08:04

1218985 · Answer 1 · 2020-08-28T05:07:35.300

2

This looks more like you've named your own class the same way as the Gson JsonParser class. So the compiler resolves JsonParser to your own class (your.package.JsonParser) and not to the Gson JsonParser (com.google.gson.JsonParser). You may want to rename your class or use com.google.gson.JsonParser instead of JsonParser each time you want to refer to this class.

Another possibility is that the Gson library that you're using might be older than version 2.8.6. If this is the case, you've to upgrade your Gson lib. The static method JsonParser.parseString is added in version 2.8.6. Checkout the change log.

For Maven, use:

<dependency>
    <groupId>com.google.code.gson</groupId>
    <artifactId>gson</artifactId>
    <version>2.8.6</version>
</dependency>

For Gradle, use:

compile group: 'com.google.code.gson', name: 'gson', version: '2.8.6'

For SBT, use:

libraryDependencies += "com.google.code.gson" % "gson" % "2.8.6"

For Ivy, use:

<dependency org="com.google.code.gson" name="gson" rev="2.8.6"/>

For Grape, use:

@Grapes(
    @Grab(group='com.google.code.gson', module='gson', version='2.8.6')
)

For Leiningen, use:

[com.google.code.gson/gson "2.8.6"]

For Buildr, use:

'com.google.code.gson:gson:jar:2.8.6'

edited Aug 28 '20 at 05:07

answered Aug 27 '20 at 08:02

1218985

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JsonBuilderForUserFromDB --> This is my class name, so no improper naming convention. – SharadxDutta Aug 27 '20 at 08:03
it was working fine till yesterday, I decided to make a new package and move my code to new package under new class name which is JsonBuilderForUserFromDB – SharadxDutta Aug 27 '20 at 08:05
Have ever renamed your class to JsonParser by any chance in between? Do you want to try a clean build? – 1218985 Aug 27 '20 at 08:06
I can try clean build but never named my class to JsonParser. Should I clean build? – SharadxDutta Aug 27 '20 at 08:11
Sure, please try a rebuild and let's see how it goes. – 1218985 Aug 27 '20 at 08:18
1

It did not work, I used a work around, since it was basically for beautifying the JSON (from a single line to proper formatted JSON) – SharadxDutta Aug 27 '20 at 08:30
Cool, not sure what version of Gson you've, compile group: 'com.google.code.gson', name: 'gson', version: '2.8.6'? – 1218985 Aug 27 '20 at 08:32
It was 2.3, was it because of 2.3? – SharadxDutta Aug 27 '20 at 10:00
1

Ah, it's because of that, you've to upgrade your Gson library to version: '2.8.6'. – 1218985 Aug 28 '20 at 02:05

The method parseString(String) is undefined for the type JsonParser

1 Answers1