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Mention in User Guide alternative for Gson versions without fromJson(..., TypeToken) #2209

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Merged
eamonnmcmanus merged 1 commit into from
Sep 30, 2022
Merged

Mention in User Guide alternative for Gson versions without fromJson(..., TypeToken) #2209

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4 changes: 4 additions & 0 deletions UserGuide.md
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Original file line number Diff line number Diff line change
Expand Up @@ -226,6 +226,8 @@ String json = gson.toJson(ints); // ==> json is [1,2,3,4,5]

// Deserialization
TypeToken<Collection<Integer>> collectionType = new TypeToken<Collection<Integer>>(){};
// Note: For older Gson versions it is necessary to use `collectionType.getType()` as argument below,
// this is however not type-safe and care must be taken to specify the correct type for the local variable
Collection<Integer> ints2 = gson.fromJson(json, collectionType);
// ==> ints2 is same as ints
```
Expand Down Expand Up @@ -267,6 +269,8 @@ TypeToken<Map<String, String>> mapType = new TypeToken<Map<String, String>>(){};
String json = "{\"key\": \"value\"}";

// Deserialization
// Note: For older Gson versions it is necessary to use `mapType.getType()` as argument below,
// this is however not type-safe and care must be taken to specify the correct type for the local variable
Map<String, String> stringMap = gson.fromJson(json, mapType);
// ==> stringMap is {key=value}
```
Expand Down