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JBlend Package
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JBlend Package
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<H3>
Loading into Tcl interpreter:
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<b>package require JBlend ?version?</b>

<P>
<B>package require JBlend</B> loads the <B>JBLend</B> package into the
interpreter. The <B>JBlend</B> package provides an interface for creating and
manipulating Java objects via <I>object handles</I>. Object handles are
references to Java objects in Tcl. Many of the commands in this
package take arguments and return values that are object handles.

<P>

When the <B>JBlend</B> package is loaded into a Tcl interpreter, a new 
namespace named <B>::java</B> will be created, along with a new JVM instance in Tcl's process space.


<P>

You can control some how to start this JVM instance, by setting the global variable
<B>tclblend_init</B> <U>before</U> loading the package.
<BR>
Note that <B>tclblend_init</B> is a <U>list of strings</U>, and each element is passed as
an option to the Java Virtual Machine being instantiated (see Example below).
<BR>
After loading the package, you can inspect all the JVM properties by examining
the global array <B>::java::jvm</B> ( or the old <U>deprecated</U> array <B>::tcljava</B>).


<p>
<H4>Example:</H4>

<code>lappend ::tclblend_init "-verbose:jni"  ;#print debugging messages</code>

<P>
For <B>-verbose</B>, the value should be a string with one or
more comma separated names (i.e. <B>class,jni</B>).  
The standard names are:
	 <B>class</B>, <B>gc</B>, <B>jni</B>
To see what other options are available, run <B>java -help</B>
from the command line.
 <p>
In addition <B>tclblend_init</B> can have the following values:
<p>
<B>help</B><br>
Print a help message and then stop JVM initialization.<br>
<B>debug</B><br>
Print out debugging messages when the package is loaded.<br>
<p>
To use <B>tclblend_init</B>, set it before loading the <B>java</B>
package:

<code>
<pre>
set tclblend:init {}
lappend tclblend_init "-verbose:jni"
lappend tclblend_init "debug"
package require JBlend

parray java::jvm  ;# prints all the currently loaded JVM properties.
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<pre>Based on TclBlend <a href="../license.html">Copyright</a> &copy; 1994-1998 Sun Microsystems, Inc.<br></pre>
<pre>JBlend is Copyright &copy; 2016 - Irrational Numbers.<br></pre>

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