Doubt in java programming...?

@morningdot-6Xuj4M • Oct 23, 2024

Oct 23, 2024

1.1K

hello friends,
check these codes..

import java.awt.*;
import java.applet.*;
import java.awt.event.*;
public class pp extends Applet implements ActionListener
{
    TextField t;
      Button    b;
    public void init()     
    {
            setLayout(new FlowLayout());
           t= new TextField(40 );
            b = new Button("Send");
        b.addActionListener(this);
            add(t);
            add(b);
      }
     public void actionPerformed(ActionEvent e) 
    {
               String str=t.getText();
        dc a2 =(dc)getAppletContext().getApplet("a2");
               if ( a2 != null ) 
        {
                  a2.append(str);
               }
               else 
        {
                  System.out.println("Applet not found?");
               }
         }
}

and the 2nd applet code goes here...

import java.applet.*;
import java.awt.*;
import java.awt.event.*;
/*<Applet code="dc" height=400 width=400></Applet>*/
public class dc extends Applet
{
    TextArea t;
    public void init()
    {
        setLayout(new FlowLayout());
        t=new TextArea(40,50);
        add(t);
    }
    public void append(String msg)
    {
        t.setText(msg);
    }
}

here goes the html codes...

<HTML><HEAD></HEAD><BODY>
<APPLET CODE="pp.class"   
        HEIGHT=400 WIDTH=400>
</APPLET>
<APPLET CODE="dc.class"  
        HEIGHT=500 WIDTH=500>
</APPLET>
</BODY></HEAD>

Don't know why it doesn't works.
Can anyone tell me where i have done mistake here....?

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sookie

@sookie-T06sFW • Jan 4, 2011

@mohit Can you please show the error logs ? What error you are getting?
0
Morningdot Hablu

@morningdot-6Xuj4M • Jan 5, 2011

No error sookie...it will compiled fine but communication between applets doesn't take place...check this.....#-Link-Snipped-#

0
sookie

@sookie-T06sFW • Jan 6, 2011
Hi Mohit,

I checked your code and found that in pp.java at line # 20

dc a2 =(dc)getAppletContext().getApplet("a2");
You are trying to call an applet with name as "a2" as per the AppletContext.getApplet method specifications but I checked in your HTML page, there is no name specified. You are supposed to specify the name of the "dc" applet as "a2" in the HTML code. So now your new HTML code should be
```
<HTML><HEAD></HEAD><BODY>
<APPLET CODE="pp.class"   
        HEIGHT=400 WIDTH=400>
</APPLET>
<APPLET CODE="dc.class" name="a2" 
        HEIGHT=500 WIDTH=500>
</APPLET>
</BODY></HEAD>
```
Now run, it will work. Let me know if any questions.

-Sookie
0