Determine if Java feature is available
Use the following code snippet to test that the AWT GUI components are available before attempting to display a Java Frame.
if usejava('awt') myFrame = java.awt.Frame; else disp('Unable to open a Java Frame'); end
If the AWT is not available on your system, MATLAB® displays the message.
Use the following code snippet to terminate a script if MATLAB does not have access to JVM™ software.
The variable, filename, is a function that contains Java code.
if ~usejava('jvm') error([filename ' requires Java to run.']); end
Java feature, specified as one of these values:
Java GUI components in the Abstract Window Toolkit (AWT) components are available.
MATLAB interactive desktop is running.
Java Virtual Machine software (JVM) is running.
Swing components (Java lightweight GUI components in the Java Foundation Classes) are available.