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This page contains an archived post to the Java Answers Forum made prior to February 25, 2002.
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Message:
solution
Posted by Atul Patel on April 29, 2001 at 9:07 AM
did you ever get a solution to this? I'm having the same problem.
> 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(){}
> }
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