tf = usejava(feature)returns logical1(true) if the specified feature is supported. Otherwise, it returns logical0(false). If the Java®feature is unavailable, then you can use this function for error handling.
Use the following code snippet to test that the AWT GUI components are available before attempting to display a Java Frame. If the AWT is not available on your system, MATLAB®displays the messageUnable to open a Java Frame.
ifusejava('awt') myFrame = java.awt.Frame;elsedisp('Unable to open a Java Frame')end
Call error Function
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
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