Live Connect Kevin Andrusky Stephen Bodnar Darshan Gill

Live. Connect Kevin Andrusky Stephen Bodnar Darshan Gill

Overview Introduction Java. Script to Java. Script Controlling Plug-ins to Java. Script

Introduction Developed by Netscape to permit Communication between: Java l Java. Script, and l Plug-ins l Implemented in Netscape 3. 0 Later implemented by Microsoft for Internet Explorer 4. 0

Java. Script to Java

Controlling Applets

Calling Java Methods

Type Conversions Java. Script Java number float boolean string String Other JSObject

Type Conversions

Java to Java. Script

Preparation

JSObject API (part) get. Window(Applet a) Retrieves the window handle. get. Member(String name) Retrieves a named member of a Java. Script object. this. name set. Member(String name, Object value) Sets a named member of a Java. Script object. this. name = value call(String Calls a Java. Script method. Name, Object method. args[]) This. method. Name (arg[0] …)

Example

Type Conversions Javascript Numeric types Number Boolean JSObject Original Object Array Other Java Object Wrapper

Controlling Plug-ins

Prerequisites

Controlling Plug-ins

Plug-ins to Java Complicated l Involves combining C and Java See: http: //www. netscape. com/eng/mozilla/3. 0/handbook/plugins/pjava. htm

Plug-ins to Java. Script If Plug-in is a subclass of netscape. plugin. Plugin l Same as Java to Java. Script methods

Conclusions Powerful technology, though not widely used. Rather antiquated, Netscape 6 doesn’t have full support for Live. Connect anymore Newer technologies? l Flash?

Live. Connect Examples Java To Java. Script: l http: //www. apl. jhu. edu/~hall/java/Java. Script-from-Java. html Java. Script To Java: l l l http: //www. netscape. com/eng/mozilla/3. 0/handbook/javascript/livecon. htm http: //www. apl. jhu. edu/~hall/java/Java-from-Java. Script. html http: //www. webreference. com/javascript/961202/part 01. html

Live. Connect Info References We Used • • • http: //www. netscape. com/eng/mozilla/3. 0/handbook/javascript/livecon. htm http: //www. netscape. com/eng/mozilla/3. 0/handbook/plugins/ http: //developer. netscape. com/docs/manuals/communicator/jsref/pkg. htm http: //www. js-examples. com/javascript/core_js 15/lc. php 3 http: //developer. netscape. com/docs/manuals/signedobj/trust/owp. htm http: //java. sun. com/j 2 se/1. 3/docs/guide/plugin/security. html