MATLAB BUILDER JA 2 Podręcznik Użytkownika Pobierz pdf (Strona 18)

1 Getting Started

Using the Comm and Line to Create Java Components (Contin ued)

Action to Perform

mcc Option to Use Description

-S

Tells Java Builder to create a single MCR when the

first Java class is instantiated. T his M CR i s reused

and shared among all subsequent class instances

within the component, resulting in more efficient

memory usage and eliminating the MCR startup

cost in each subsequent class instantiation.

By default, a new MCR instance is created for each

instance o f each Java class i n the component. Use

-S to change the default.

When using

-S, note that all class instances

share a single MATLAB workspace and share

global variables in the M-files used to build the

component. This makes properties of a Java class

behave as static properties instead of instance-wise

properties.

Control how each

Java class uses the

MCR.

Example

mcc -S 'java:mycomponent,myclass' foo.m bar.m

The example creates a Java component called mycomponent containing

asingleJavaclassnamed

myclass with methods foo and bar.(Seethe

first example in this table).

If and when multiple instances of

myclass are instantiated in an

application, only o ne MCR is ini t ialized, and it is shared by all instances

myclass.

Specify a directory

for output

-d dir ectoryname

Tells Java Builder to create a directory and copy

the output files to it. (If you use

mcc instead

of the GUI, the

project_directory\src and

project_directory\distrib directories are not

automatically created.)

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