JavaScript call to Java applet

Question

Sorry if this message get posted twice, but I haven't seen the 1st. I sent.
I seem to have a problem with a form trying to call an applet. I hava a button like this:
<input type=button value="Add" onClick="Nota.addRow('2','3','12.80','Cacahuates Mafer 1/2 kg.')">
my Nota.addRow method is thisone:
public void addRow (String idS, String qtyS, String priceS, String desc) {
int id= Integer.parseInt (idS);
int qty= Integer.parseInt (qtyS);
float price= Float.parseFloat (priceS);
remove (total);
renglones[renglonCnt]= new Renglon (id,qty,price,desc);
add (renglones[renglonCnt]);//<- This line is not adding the Row when i call it from JavaScript. Otherwise it works just fine...
//total= Renglon.Total();
//add (total);
System.out.println("El id es: " + Integer.toString(id));
System.out.println("La cantidad es: " + Integer.toString(qty));
System.out.println("El precio es: " + Float.toString(price));
System.out.println("La descripcion es: " + desc.toString());
System.out.println("El precio del objeto es: " + Float.toString(renglones[renglonCnt].getTotal()));
renglonCnt++;
Altough my addRow works when I callit from a Nota object it doesn't when i call it from javascript.
total is just a panel that you get from class Renglon.
And Renglon is a Panel class too.
I'll appreciate any help, thanks.
Jeronimo

Answer 1

Hey, that's really good news, does it actually adds the row to the applet and gets the new total?!
Anyway, i tried 1.) (wich describes the applet quite well) and 2.) but still doesn't works for me. Also changed the "price" line...
Im using:
Navigator 4.72
IE 5.50
Netscape 6
Here's the html code (the form):
<form>
<table border=5 WIDTH=500 align=center>
<tr>
<TD width=30%>
<table border=1 width="100%" >
<tr>
<th WIDTH="20%"> Cantidad </th>
<th WIDTH="26%"> Descripci&oacute;n </th>
<th WIDTH="20%">Precio Unitario</th>
<th WIDTH="20%"> Agregar </th>
</tr>
<tr>
<td WIDTH="20%" align=center>
     <input size=2 name=cantidad maxlength=2>
     </td>
<td WIDTH="26%">
     Cerveza Sol 600ml.
     </td>
<td WIDTH="20%">
     $15.50
     </td>
<td WIDTH="20%" align=center>
     <input type=button value="Add" onClick="document.Nota.addRow('1','12','15.50','Cerveza-Sol-600ml.')">
     </td>
</tr>
<tr>
<td WIDTH="20%" align=center><input size=2 maxlength=2></td>
<td WIDTH="26%">
     Cacahuates Mafer 1/2 kg.
     </td>
<td WIDTH="20%">
     $12.80
     </td>
<td WIDTH="20%" align=center>
     <!--<input type=button value="Add" onClick="Nota.addRow('2','3','12.80','Cacahuates Mafer 1/2 kg.')">
     -->
     <input type=button value="Test" onClick="alert (Nota)"
     </td>
</tr>
<tr>
<td WIDTH="20%" align=center><input size=2 maxlength=2></td>
<td WIDTH="26%"> </td>
<td WIDTH="20%"> </td>
<td WIDTH="20%" align=center>
     <input type=button value="Add">
     </td>
</tr>
<tr>
<td WIDTH="20%" align=center><input size=2 maxlength=2></td>
<td WIDTH="26%"> </td>
<td WIDTH="20%"> </td>
<td WIDTH="20%" align=center><input type=button value="Add"></td>
</tr>
</table>
</td>
<td width="40%">
<applet name=Nota code=Nota.class width=350 height=250> </applet>
</td>
</tr>
<tr>
<td colspan=2 align=center>
<input type=button value="Enviar Pedido">
</td>
</tr>
</table>
</form>
Here's the Nota applet code:
import java.awt.*;
import java.applet.*;
public class Nota extends Applet {
private Renglon renglones[];
private BarraTitulo titulo;
private int renglonCnt;
private Panel total;
public void init () {
setLayout (new GridLayout(12,1));
renglonCnt=0;
renglones= new Renglon [10];
total= Renglon.Total();
public void start () {
String titulos[]= new String [4];
titulos[0]="(-) Cantidad (+)";
titulos[1]="Descripcion";
titulos[2]="Precio Unitario";
titulos[3]="Total";
titulo= new BarraTitulo (titulos,12);
add (titulo);
add (total);
public void addRow (String idS, String qtyS, String priceS, String desc) {
int id= Integer.parseInt (idS);
int qty= Integer.parseInt (qtyS);
//float price= Float.parseFloat (priceS);
float price= Float.valueOf (priceS).floatValue();
remove (total);
renglones[renglonCnt]= new Renglon (id,qty,price,desc);
add (renglones[renglonCnt]);
//total= Renglon.Total();
//add (total);
//THESE LINES SHOW EVERTHING WELL IN THE JAVA CONSOLE, BUT THESE ARE JUST FOR DEBUG. System.out.println("El id es: " + Integer.toString(id));
System.out.println("La cantidad es: " + Integer.toString(qty));
System.out.println("El precio es: " + Float.toString(price));
System.out.println("La descripcion es: " + desc.toString());
System.out.println("El precio del objeto es: " + Float.toString(renglones[renglonCnt].getTotal()));
renglonCnt++;
This is the Renglon class code:
import java.awt.*;
import java.awt.event.*;
public class Renglon extends Panel implements ActionListener {
private TextField qty, description, up, total;
private Button more, less;
private int cantidad, identificador;
private float unitP;
private String descripcion;
static float elTotal= 0;
static Panel totalP= new Panel();
static Label c4tot= new Label();
public Renglon () {
this(1, 1, (float) 2.50, "Algun articulo");
public Renglon (int id, int q, float pu, String desc) {
identificador= id;
cantidad= q;
unitP= pu;
descripcion= desc;
elTotal+= cantidad * unitP;
Panel addsub;
setLayout (new GridLayout (1,4));
addsub= new Panel();
addsub.setLayout(new GridLayout(1,3));
less= new Button ("<<");
more= new Button (">>");
less.addActionListener (this);
more.addActionListener (this);
Integer c= new Integer (cantidad);
qty= new TextField (c.toString());
description= new TextField (descripcion);
Float x= new Float (unitP);
up= new TextField ("$" + x.toString());
Float t= new Float (getTotal());
total= new TextField ("$" + t.toString());
qty.setEditable (false);
description.setEditable (false);
up.setEditable (false);
total.setEditable (false);
addsub.add (less);
addsub.add (qty);
addsub.add (more);
add (addsub);
add (description);
add (up);
add (total);
setVisible (true);
public float getTotal () {
return ((float) cantidad*unitP);
public void actionPerformed (ActionEvent e) {
if (e.getActionCommand().equals("<<")){
cantidad--;
elTotal-= unitP;
if (cantidad < 0) {
cantidad=0;
     elTotal+= unitP;
} else {
cantidad++;
elTotal+= unitP;
Float nuevoTot= new Float (getTotal());
Integer c= new Integer (cantidad);
qty.setText (c.toString());
total.setText ("$" + nuevoTot.toString());
Float et= new Float (elTotal);
c4tot.setText("$" + et.toString());
static public Panel Total () {
totalP.setLayout (new GridLayout(1,4));
Label c1,c2,c3;
Float totalF= new Float (elTotal);
c1= new Label("");
c2= new Label("");
c3= new Label("Total:");
c4tot= new Label("$" + totalF.toString());
totalP.add(c1);
totalP.add(c2);
totalP.add(c3);
totalP.add(c4tot);
totalP.setVisible(true);
return (totalP);
And just in case, this is the BarraTitulo class code:
import java.awt.*;
public class BarraTitulo extends Panel {
public BarraTitulo (String [] titulos) {
this (titulos,15);
public BarraTitulo (String [] titulos, int size) {
Label labels;
Font ft= new Font("Serif",Font.BOLD, size);
int length= titulos.length + 1;
setLayout (new GridLayout (1,length));
setFont (ft);
for (int i=0; i< titulos.length; i++) {
labels= new Label(titulos);
add (labels);
Thanx again for your time.
Jeronimo