Determine if Java feature is available
tf = usejava(feature)
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.
filename, is a function
that contains Java code.
if ~usejava('jvm') error([filename ' requires Java to run.']) end
feature— Java feature
Java feature, specified as one of these values:
UI components in the Java Abstract Window Toolkit (AWT) are available.
MATLAB interactive desktop is running.
Java Virtual Machine software (JVM) is running.
Swing components (Java lightweight UI components in the Java Foundation Classes) are available.