Marvin Applet Platforms

Marvin/AWT

• The pop-up menu (appears on right click). It does not exist in AWT 1.0 (used by Netscape 2.0-4.05 and by all browsers on Mac OS 9). Marvin detects this problem and does not try to use the menu if it finds itself in one of these browsers. There is another pop-up menu related problem in Microsoft Explorer 5.0: checkbox menu items in the top level folder don't work. To resolve this Microsoft bug, MarvinView puts the "Animate" checkbox into the "Move" subfolder if it finds itself in a version 1.1 JVM by Microsoft Corp. There is a similar workaround in MarvinSketch (the "Type" subfolder of bond types).
• Antialiasing. This is an advanced graphics technique that makes line drawing much nicer. It requires Java 2D, so it only works in Java 1.2 or later JVMs: Sun's Java Plugin 1.2, Netscape 6, etc. In older JVMs, bond drawing is done without antialiasing.
• Copy & Paste, Drag & Drop.

Marvin/Swing

*:	Netscape 4.x can use Java 1.3 and Swing with Java Plugin, but in this case applet methods cannot be accessed from JavaScript (see Sun's Java Plugin).
**:	Limitations under OS X. (see Notes for Mac users)

Swing applets can be accessed in two ways:

• Netscape versions 6 - 7.0 contain Java 2 (including Swing), but older browsers and Microsoft Internet Explorer do not support Swing by default. Since Netscape 7.01, the browser uses the installed JRE (Java Runtime Environment).
  In Netscape 4.x and MS Explorer 4.x-5.x, you can use Swing applets two ways:
  • With Sun's Java Plugin.
  • With your browser's built-in JVM and the swing.jar file from Sun's Swing 1.1.
    • Netscape (from version 4.06) and MS Explorer can use swing.jar if you specify its path in the CLASSPATH environment variable.
    • Another solution is to copy swing.jar into Netscape's java/classes subdirectory (the directory where you can also find java40.jar).
  
  
• Sun's Java Plugin With Sun's Java Plugin, you can use both the AWT and Swing versions of the applets.

  Note however, that you may encounter a serious problems with it: applet methods cannot be accessed from JavaScript in Netscape, due to some limitations in the plugin interface.

  calling Java from JavaScript calling JavaScript from Java Netscape 7.01 - yes yes (MAYSCRIPT)1,2 Netscape 6.x, 7.0 yes yes (MAYSCRIPT)1,3 Netscape 4.x no yes (MAYSCRIPT) MS Explorer 4.x, 5.x, 6.x yes yes (MAYSCRIPT)1

  1: Limitations under OS X. (see Notes for Mac users)
  2: Does not include built-in Java. Use the installed JRE (Java Runtime Environment).
  3: Under Linux, the browser may crash when a signed applet calls JavaScript from Java.

  In Netscape 6 and later versions (if Java Plug-in 1.3.1_01a or later is installed) the applet will be run by the installed plug-in even in built-in mode (APPLET tag). In that case in Netscape 6.x, there are no problem with Java - JavaScript communication unless using the EMBED tag.