✎ javacard:jcvm:3.1_data_types_and_values [wiki]

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===== 3.1 Data Types and Values =====

The Java Card virtual machine supports the same two kinds of data types as the Java virtual machine: **//primitive types//** and **//reference types//**. Likewise, the same two kinds of values are used: **//primitive values//** and **//reference values//**. 

The primitive data types supported by the Java Card virtual machine are the **//numeric types//**, the **//boolean type//**, and the **returnAddress** type. The **//numeric types//** consist only of these types: 

 

  ***byte**, whose values are 8-bit signed two's complement integers    

  ***short**, whose values are 16-bit signed two's complement integers    

Some Java Card virtual machine implementations may also support an additional integral type: 

 

  ***int**, whose values are 32-bit signed two's complement **int**egers    

Support for the boolean type is identical to that in the Java virtual machine. The value 1 is used to represent true and the value of 0 is used to represent false. 

Support for **reference** types is identical to that in the Java virtual machine.

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