Supported Types
The IC4J Candid Library allows Java developers to serialize and deserialize Java native types to IC Candid IDL types.
"Candid is an interface description language. Its primary purpose is to describe the public interface of a service, usually in the form of a program deployed as a canister smart contract that runs on the Internet Computer. One of the key benefits of Candid is that it is language-agnostic, and allows inter-operation between services and front-ends written in different programming languages, including Motoko, Rust, and JavaScript."
This table shows implicit mapping between Candid types and default Java type assignment.
| Candid | Java |
|---|---|
bool | Boolean |
int | BigInteger |
int8 | Byte |
int16 | Short |
int32 | Integer |
int64 | Long |
nat | BigInteger |
nat8 | Byte |
nat16 | Short |
nat32 | Integer |
nat64 | Long |
float32 | Float |
float64 | Double |
text | String |
opt | Optional |
principal | Principal |
vec | array, List |
record | Map, Class |
variant | Map, Enum |
func | Func |
service | Service |
null | Null |
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