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Click here... 		Communication Java <--> JavaScript
(LiveConnect)

Different users asked about LiveConnect.
Here is a basic example involving communication between Java and JavaScript, with an applet compiled using JDK 1.0.2, running in the standard JVM.

Following cases are handled
A: Java -> JavaScript
1) Java notifies JavaScript when the applet is started.
2) Java notifies JavaScript when a Java button is clicked.
3) Java accesses a form element directly in the HTML
4) Java accesses a form element in the HTML through a JS function with arguments
5) Java uses alert() in JavaScript
B: JavaScript -> Java
6) JavaScript calls a public method in Java with an argument (int)
7) JavaScript calls a public method in Java with an argument (string)

Your browser does not support Java...




This textfield is accessed by the applet through a JavaScript function


Copy the value of this text field to the applet's textfield on click of the button

<SCRIPT LANGUAGE="JavaScript"> <!-- /* Script by GalaSoft Laurent Bugnion */ /* 06.09.2000 */ /* www.galasoft.ch */ // This variable stores the number of time that the JS button // has been clicked var iJSCounter = 0; // This function passes the value to the applet by // calling a public method function callApplet() { var theApplet = document.TestJSObject; theApplet.jSButtonClicked( ++iJSCounter ); } // This function calls a method in the applet // with a string parameter function copyText( aText ) { var theApplet = document.TestJSObject; theApplet.receiveText( aText ); } // This function is called from the applet function copyValueFromApplet( theTextValue ) { document.myForm.textOutput2.value = theTextValue; } //--> </SCRIPT> <APPLET ARCHIVE = "TestJSObject.jar" CODEBASE = "." CODE = "galasoftLB.pTestJSObject.TestJSObject.class" NAME = "TestJSObject" WIDTH = 505 HEIGHT = 70 HSPACE = 0 VSPACE = 0 ALIGN = middle MAYSCRIPT> Your browser does not support Java... </APPLET> <FORM NAME="myForm"> <INPUT NAME="textOutput" TYPE="text" VALUE="(void)" SIZE="45" ONFOCUS="blur();"> <BR><BR> <INPUT NAME="buttonInput" TYPE="button" VALUE="Call the applet" ONCLICK="callApplet();"> <BR><BR> This textfield is accessed by the applet through a JavaScript function <BR> <INPUT NAME="textOutput2" TYPE="text" VALUE="" SIZE="45" ONFOCUS="blur();"> <BR><BR> Copy the value of this text field to the applet's textfield on click of the button <BR> <INPUT NAME="textInput1" TYPE="text" VALUE="Enter a text here" SIZE="45"> <BR> <INPUT NAME="buttonInput2" TYPE="button" VALUE="Copy the text" ONCLICK="copyText(this.form.textInput1.value);"> </FORM>