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/*
Mastering JavaScript, Premium Edition
by James Jaworski
ISBN:078212819X
Publisher Sybex CopyRight 2001
*/
<title>Accessing JavaScript from an applet</TITLE>
<form NAME="textForm">
<P>Enter some text and then click Display Text:
<INPUT TYPE="text" NAME="textField" SIZE="20"></P>
</FORM>
<APPLET CODE="ReadForm.class" WIDTH=400 HEIGHT=100
NAME="readApp" MAYSCRIPT>
[The ReadForm Applet]
</APPLET>
//Reading a JavaScript Form (ReadForm.java)
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import netscape.javascript.JSObject;
import netscape.javascript.JSException;
public class ReadForm extends Applet {
String text="Enter some text for me to display!";
Font font = new Font("TimesRoman",Font.BOLD+Font.ITALIC,24);
JSObject win, doc, form, textField;
public void init() {
win = JSObject.getWindow(this);
doc = (JSObject) win.getMember("document");
form = (JSObject) doc.getMember("textForm");
textField = (JSObject) form.getMember("textField");
setLayout(new BorderLayout());
Panel buttons = new Panel();
Button displayTextButton = new Button("Display Text");
displayTextButton.addActionListener(new ButtonEventHandler());
buttons.add(displayTextButton);
add("South",buttons);
}
public void paint(Graphics g) {
g.setFont(font);
g.drawString(text,30,30);
}
class ButtonEventHandler implements ActionListener {
public void actionPerformed(ActionEvent e){
String s = e.getActionCommand();
if("Display Text".equals(s)) {
text= (String) textField.getMember("value");
win.eval("alert(\"This alert comes from Java!\")");
repaint();
}
}
}
}
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