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Message:

I NEED YOUR HELP!! How can I fix this error, "InstantiationException"?

Posted by sunny on October 18, 2000 at 8:20 AM

How can i fix this error..I NEED YOUR HELP!!
This program run well on the appletviewer, but when I start Explorer, it returns an error message "HelloWorld can't be instantiated" on the state bar of Explorer and Jav Console Window shows this error message...
========= error=========
java.lang.InstantiationException: HelloWorld

at com/ms/applet/BrowserAppletFrame.newInstance (BrowserAppletFrame.java)<
at com/ms/applet/AppletPanel.processSentEvent (AppletPanel.java)
at com/ms/applet/AppletPanel.processSentEvent (AppletPanel.java)
at com/ms/applet/AppletPanel.run (AppletPanel.java)
at java/lang/Thread.run (Thread.java)

This is my code..
====================================================
import com.ms.security.*;
import java.io.*;
import java.net.*;
import java.awt.*;
import java.awt.event.*;
import java.lang.*;
import java.applet.*;

public class HelloWorld extends Applet implements ActionListener{
public native void playWaveFile();
public native void displayHelloWorld();
public native void returnHandle();

static {System.loadLibrary("Hello");}

private Panel pnlTotal;
private Panel pnlOperator;
private Panel pnltaShow;
private TextArea taShow;
private Button btnPlay;
private Button btnRecord;

public void init(){
try{
PolicyEngine.assertPermission(PermissionID.SYSTEM);
}catch(Throwable cnfe){}

pnlTotal = new Panel(new BorderLayout());
pnlOperator = new Panel();
pnltaShow = new Panel();

btnPlay = new Button("Play");
btnPlay.addActionListener(this);
btnPlay.setEnabled(true);
pnlOperator.add(btnPlay);

btnRecord = new Button("Record");
btnRecord.addActionListener(this);
btnRecord.setEnabled(true);
pnlOperator.add(btnRecord);

taShow = new TextArea(13,39);
pnltaShow.add(taShow);
taShow.setEditable(false);

add(pnlOperator, "South");
add(pnltaShow, "Center");

setSize(300, 300);
setVisible(true);

taShow.append("You can record and play using this program\n");
}

public void actionPerformed(ActionEvent event){
String command = event.getActionCommand();

if(command.equals("Play")){
taShow.append("Start play...\n");
playWaveFile();
returnHandle();
taShow.append("End play...\n");
}else if(command.equals("Record")){
taShow.append("Start record...\n");
displayHelloWorld();
returnHandle();
taShow.append("End record...\n");
}
}
public void start(){}
public void stop(){}
public void destroy(){}
}

• error T.R.Venkatesaaran February 06, 2002 at 1:42 AM (1)
  • Applet InstantiationException with International IE Peter Loveall February 19, 2002 at 5:51 AM (0)
• solution Atul Patel April 29, 2001 at 9:07 AM (2)
  • same problem... josh April 29, 2001 at 4:55 PM (1)
    • Same problem, but security solution Rogier October 22, 2001 at 9:45 AM (0)