The maximum number of variables that can be used in a method is 255. This limit includes local variables, method parameters, and, in the case of an instance method invocation, a reference to the object on which the instance method is being invoked (meaning, this). An int data type is counted as occupying two local variables.

A method can have at most 32767 Java Card virtual machine bytecodes. The number of Java Card technology-based bytecodes (“Java Card bytecodes”) may differ from the number of Java bytecodes in the Java virtual machine implementation of that method.

The maximum depth of an operand stack associated with a method is 255 16-bit cells.