Invoked from the Swing Event Dispatch Thread.

Example

% Crate a JFrame and have all subsequent methods invoke on the EDT.

f = javaObjectEDT('javax.swing.JFrame', 'New Title')

f.getTitle

Caveats

When a Java array of arrays is indexed with only one subscript,

the value returned is an array in the top level array of arrays,

not a scalar element of the linearized form of the array of

arrays.

See also perl, mex, javaObjectEDT, javaMethodEDT

Overloaded methods:

sgmltag/java

<usejava> - True if the specified Java feature is supported in MATLAB.

USEJAVA True if the specified Java feature is supported in MATLAB.

USEJAVA(LEVEL) returns 1 if the feature is supported and

0 otherwise.

The following levels of support exist:

LEVEL MEANING

-----------------------------------------------------

'jvm' The Java Virtual Machine is running.

'awt' AWT components are available.

'swing' Swing components are available.

'desktop' The MATLAB interactive desktop is running.

"AWT components" refers to Java's GUI components in the Abstract

Window Toolkit. "Swing components" refers to Java's lightweight

GUI components in the Java Foundation Classes.

EXAMPLES:

If you want to write an m-file that displays a Java Frame and want

to be robust to the case when there is no display set or no JVM

available, you can do the following:

if usejava('awt')

myFrame = java.awt.Frame;

else

disp('Unable to open a Java Frame.');

end

If you want to write an m-file that uses Java code and want it to

fail gracefully when run in a MATLAB session that does not have access

to a JVM, you can add the following check:

if ~usejava('jvm')

error([mfilename ' requires Java to run.']);

end

See also javachk

Reference page in Help browser

doc usejava