HELP! Cant solve error message jdownload.class
Hi everybody cant solve this problem with this error message when IE is
trying to start some applet function on some web sites using this java class ( jdownload.class )?!
getting this error message: Exception:java.lang.ClassNotFoundException:jdownload.class
found something about this on this forum and the solution would be to edit the autoexec.bat lines for the path for java ..!
But this didn�t work out for me - i got no lines in autoexec.bat , it�s empty ..
So if anyone can help me out that got more brains than me about this error - please help .
best regards: mike lindmark sweden
pc info: Win xp pro running IE 6.0 with java for xp installed ..!
http://forum.java.sun.com/thread.jsp?forum=54&thread=206738
http://forum.java.sun.com/thread.jsp?forum=54&thread=263239
http://java.sun.com/j2se/1.4/docs/tooldocs/windows/classpath.html
If this isn't enough, just search the forums for "xp classpath"
chuck
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Help on 2 error messages / code request please
Why am I getting this error message about an abstract when I'm not declearing one.
error messages I'm getting below -----------
.\LkList.java:26: Method LinkedList getList() requires a method body. Otherwise declare it as abstract.
public LinkedList getList();
DCalc.java:10: class LkList is an abstract class. It can't be instantiated.
LkList Expression =new LkList(exp);
code below ------------------------------
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.event.*;
import java.util.*;
class JCal extends JFrame implements KeyListener
JLabel answer, expression;
JButton b1, b2, b4, b5, b6, b7, b8, b9, b10, b11, b12, b13, b14, b15, b16, b17, b18, b19,
b20, b21, b22, b23, b24, b25, b26, b27;
JMenuBar menuBar;
JMenu menu;
JMenuItem menuItem, menuItem1;
LkList equation;
String exp="";
String ans="";
double memory=0;
public JCal()
{ super("Nicks Swing Calculator");
//------------------------- labels ---------------------------------------------
answer = new JLabel(" 0 "); //Answer Lable
answer.setBounds (20, 20, 220, 30);
answer.setBorder (BorderFactory.createLoweredBevelBorder());
answer.setBackground (Color.pink);
answer.setHorizontalAlignment (SwingConstants.RIGHT);
expression = new JLabel(" 0 "); // Expression Lable
expression.setBounds (20, 55, 220, 30);
expression.setBorder (BorderFactory.createLoweredBevelBorder());
expression.setBackground (Color.white);
//------------------------- menu -------------------------------------------------
menuBar = new JMenuBar();
setJMenuBar (menuBar);
menu = new JMenu ("File");
menuItem = new JMenuItem (" Help", new ImageIcon("help.gif"));
menuItem1 = new JMenuItem (" Splash Page");
menuItem.addActionListener(new ActionListener() // Help menu
{ public void actionPerformed(ActionEvent e)
{ new JHelp();
menuItem1.addActionListener(new ActionListener() // Splash Page
{ public void actionPerformed(ActionEvent e)
{ new JSplash();
//------------------------ buttons ------------------------------------------------
JButton b1 = new JButton (new ImageIcon ("mc.gif")); // MR button
b1.setBounds(20, 100, 55, 50);
JButton b2 = new JButton (new ImageIcon ("mr.gif")); // MC button
b2.setBounds(75, 100, 55, 50);
JButton b3 = new JButton (new ImageIcon ("ms.gif")); // MS button
b3.setBounds(130, 100, 55, 50);
JButton b4 = new JButton (new ImageIcon ("mplus.gif")); // M+ button
b4.setBounds(185, 100, 55, 50);
JButton b5 = new JButton (new ImageIcon ("seven.gif")); // 7 button
b5.setBounds(20, 170, 55, 50);
JButton b6 = new JButton (new ImageIcon ("eight.gif")); // 8 button
b6.setBounds(75, 170, 55, 50);
JButton b7 = new JButton (new ImageIcon ("nine.gif")); // 9 button
b7.setBounds(130, 170, 55, 50);
JButton b8 = new JButton (new ImageIcon ("div.gif")); // divide button
b8.setBounds(185, 170, 55, 50);
JButton b9 = new JButton (new ImageIcon ("four.gif")); // 4 button
b9.setBounds(20, 220, 55, 50);
JButton b10 = new JButton (new ImageIcon ("five.gif")); // 5 button
b10.setBounds(75, 220, 55, 50);
JButton b11 = new JButton (new ImageIcon ("six.gif")); // 6 button
b11.setBounds(130, 220, 55, 50);
JButton b12 = new JButton (new ImageIcon ("times.gif")); // times button
b12.setBounds(185, 220, 55, 50);
JButton b13 = new JButton (new ImageIcon ("one.gif")); // 1 button
b13.setBounds(20, 270, 55, 50);
JButton b14 = new JButton (new ImageIcon ("two.gif")); // 2 button
b14.setBounds(75, 270, 55, 50);
JButton b15 = new JButton (new ImageIcon ("three.gif")); // 3 button
b15.setBounds(130, 270, 55, 50);
JButton b16 = new JButton (new ImageIcon ("minus.gif")); // minus button
b16.setBounds(185, 270, 55, 50);
JButton b17 = new JButton (new ImageIcon ("zero.gif")); // 0 button
b17.setBounds(20, 320, 55, 50);
JButton b18 = new JButton (new ImageIcon ("neg.gif")); // negitive button
b18.setBounds(75, 320, 55, 50);
JButton b19 = new JButton (new ImageIcon ("dot.gif")); // decimal button
b19.setBounds(130, 320, 55, 50);
JButton b20 = new JButton (new ImageIcon ("add.gif")); // addition button
b20.setBounds(185, 320, 55, 50);
JButton b21 = new JButton (new ImageIcon ("left.gif")); // left bracket button
b21.setBounds(20, 375, 110, 35);
JButton b22 = new JButton (new ImageIcon ("right.gif")); // right bracket button
b22.setBounds(130, 375, 110, 35);
JButton b23 = new JButton (new ImageIcon ("equals.gif")); // equals button
b23.setBounds(20, 415, 220, 35);
JButton b24 = new JButton (new ImageIcon ("clear.gif")); // clear button
b24.setBounds(20, 460, 55, 50);
JButton b25 = new JButton (new ImageIcon ("ce.gif")); // ce button
b25.setBounds(75, 460, 55, 50);
JButton b26 = new JButton (new ImageIcon ("sqrt.gif")); // sqrt button
b26.setBounds(130, 460, 55, 50);
JButton b27 = new JButton (new ImageIcon ("percent.gif")); // % button
b27.setBounds(185, 460, 55, 50);
//------------------- adding everything on the pane -------------------
Container contentPane = getContentPane();
contentPane.setLayout(null);
// the default layout is BorderLayout
contentPane.add(b1); // adds buttons
contentPane.add(b2);
contentPane.add(b3);
contentPane.add(b4);
contentPane.add(b5);
contentPane.add(b6);
contentPane.add(b7);
contentPane.add(b8);
contentPane.add(b9);
contentPane.add(b10);
contentPane.add(b11);
contentPane.add(b12);
contentPane.add(b13);
contentPane.add(b14);
contentPane.add(b15);
contentPane.add(b16);
contentPane.add(b17);
contentPane.add(b18);
contentPane.add(b19);
contentPane.add(b20);
contentPane.add(b21);
contentPane.add(b22);
contentPane.add(b23);
contentPane.add(b24);
contentPane.add(b25);
contentPane.add(b26);
contentPane.add(b27);
contentPane.add(answer); // adds answer label
contentPane.add(expression); // adds expression lable
menuBar.add(menu); // adds menu
menu.add(menuItem); // adds menu item "Help"
menu.add(menuItem1); // adds menu item "Splash Page"
//------------ button functions ---------------------------------------
b1.addActionListener(new ActionListener() // MR
{ public void actionPerformed(ActionEvent e)
{ String TempMemory="";
answer.setText(TempMemory.valueOf(memory)); }});
b2.addActionListener(new ActionListener() //Mc
{ public void actionPerformed(ActionEvent e)
{ memory=0; }});
b3.addActionListener(new ActionListener() //M-
{ public void actionPerformed(ActionEvent e)
{ Double DblTemp=new Double(answer.getText());
double dblTemp=DblTemp.doubleValue();
memory=memory-dblTemp; }});
b4.addActionListener(new ActionListener() //M+
{ public void actionPerformed(ActionEvent e)
{ Double DblTemp=new Double(answer.getText());
double dblTemp=DblTemp.doubleValue();
memory=memory+dblTemp; }});
b5.addActionListener(new ActionListener() // Seven
{ public void actionPerformed(ActionEvent e)
{ exp=exp+"7";
expression.setText(exp); }});
b5.addKeyListener(this);
b6.addActionListener(new ActionListener() // Eight
{ public void actionPerformed(ActionEvent e)
{ exp=exp+"8";
expression.setText(exp); }});
b6.addKeyListener(this);
b7.addActionListener(new ActionListener() // Nine
{ public void actionPerformed(ActionEvent e)
{ exp=exp+"9";
expression.setText(exp); }});
b7.addKeyListener(this);
b8.addActionListener(new ActionListener() // Divide
{ public void actionPerformed(ActionEvent e)
{ exp=exp+"/";
expression.setText(exp); }});
b8.addKeyListener(this);
b9.addActionListener(new ActionListener() // Four
{ public void actionPerformed(ActionEvent e)
{ exp=exp+"4";
expression.setText(exp); }});
b9.addKeyListener(this);
b10.addActionListener(new ActionListener() // Five
{ public void actionPerformed(ActionEvent e)
{ exp=exp+"5";
expression.setText(exp); }});
b10.addKeyListener(this);
b11.addActionListener(new ActionListener() // Six
{ public void actionPerformed(ActionEvent e)
{ exp=exp+"6";
expression.setText(exp); }});
b11.addKeyListener(this);
b12.addActionListener(new ActionListener() // Times
{ public void actionPerformed(ActionEvent e)
{ exp=exp+"*";
expression.setText(exp); }});
b12.addKeyListener(this);
b13.addActionListener(new ActionListener() // One
{ public void actionPerformed(ActionEvent e)
{ exp=exp+"1";
expression.setText(exp); }});
b13.addKeyListener(this);
b14.addActionListener(new ActionListener() // Two
{ public void actionPerformed(ActionEvent e)
{ exp=exp+"2";
expression.setText(exp); }});
b14.addKeyListener(this);
b15.addActionListener(new ActionListener() // Three
{ public void actionPerformed(ActionEvent e)
{ exp=exp+"3";
expression.setText(exp); }});
b15.addKeyListener(this);
b16.addActionListener(new ActionListener() // Minus
{ public void actionPerformed(ActionEvent e)
{ exp=exp+"-";
expression.setText(exp); }});
b16.addKeyListener(this);
b17.addActionListener(new ActionListener() // Zero
{ public void actionPerformed(ActionEvent e)
{ exp=exp+"0";
expression.setText(exp); }});
b17.addKeyListener(this);
b18.addActionListener(new ActionListener() // negative
{ public void actionPerformed(ActionEvent e)
{ exp=exp+"-";
expression.setText(exp); }});
b18.addKeyListener(this);
b19.addActionListener(new ActionListener() // Decimal
{ public void actionPerformed(ActionEvent e)
{ exp=exp+".";
expression.setText(exp); }});
b19.addKeyListener(this);
b20.addActionListener(new ActionListener() // Addition
{ public void actionPerformed(ActionEvent e)
{ exp=exp+"+";
expression.setText(exp); }});
b20.addKeyListener(this);
b21.addActionListener(new ActionListener() // Left Bracket
{ public void actionPerformed(ActionEvent e)
{ exp=exp+"(";
expression.setText(exp); }});
b21.addKeyListener(this);
b22.addActionListener(new ActionListener() // Right Bracket
{ public void actionPerformed(ActionEvent e)
{ exp=exp+")";
expression.setText(exp); }});
b22.addKeyListener(this);
b23.addActionListener(new ActionListener() // Equals
{ public void actionPerformed(ActionEvent e)
{ LkList equation = new LkList();
equation.ProcessExpress();
ans=equation.getAns();
answer.setText(ans);
exp="";
ans=""; }});
b23.addKeyListener(this);
b24.addActionListener(new ActionListener() // Clear
{ public void actionPerformed(ActionEvent e)
{ exp="";
ans="";
expression.setText(exp);
answer.setText(ans); }});
b25.addActionListener(new ActionListener() // Clear Entry
{ public void actionPerformed(ActionEvent e)
{ exp="";
ans="";
expression.setText(exp);
answer.setText(ans); }});
addWindowListener( new WindowAdapter()
{ public void windowClosing(WindowEvent e)
{ System.exit(0);
this.setBounds(10, 10, 270, 600);
this.show();
public static void main(String[] args)
{ new JCal();
public void keyReleased(KeyEvent evt){}
public void keyTyped(KeyEvent evt) {}
public void keyPressed(KeyEvent evt)
{ char x=evt.getKeyChar();
switch(x)
{ case '0': exp=exp+"0";
expression.setText(exp);
break;
case '1': exp=exp+"1";
expression.setText(exp);
break;
case '2': exp=exp+"2";
expression.setText(exp);
break;
case '3': exp=exp+"3";
expression.setText(exp);
break;
case '4': exp=exp+"4";
expression.setText(exp);
break;
case '5': exp=exp+"5";
expression.setText(exp);
break;
case '6': exp=exp+"6";
expression.setText(exp);
break;
case '7': exp=exp+"7";
expression.setText(exp);
break;
case '8': exp=exp+"8";
expression.setText(exp);
break;
case '9': exp=exp+"9";
expression.setText(exp);
break;
case '+': exp=exp+"+";
expression.setText(exp);
break;
case '-': exp=exp+"-";
expression.setText(exp);
break;
case '*': exp=exp+"*";
expression.setText(exp);
break;
case '/': exp=exp+"/";
expression.setText(exp);
break;
case '.': exp=exp+".";
expression.setText(exp);
break;
case '(': exp=exp+"(";
expression.setText(exp);
break;
case ')': exp=exp+")";
expression.setText(exp);
break;
default: break;
// ================================= equation =============================
class Equation
{ private double nbr1;
private double nbr2;
private char op;
private double answer;
private String StrNum1="";
private String StrNum2="";
private String StrOper="";
private String StrAns="";
//Constructor
Equation(String number1, String number2, String operator)
{ StrNum1 = number1;
StrNum2 = number2;
StrOper = operator;
convert();
public double getNum1() {return nbr1;}
public double getNum2() {return nbr2;}
public char getOp() {return op;}
private void convert()
{ Double temp=new Double(StrNum1);
nbr1=temp.doubleValue();
temp=new Double(StrNum2);
nbr2=temp.doubleValue();
op=StrOper.charAt(0);
private void convertAnswer()
{ StrAns=StrAns.valueOf(answer);
public String toString()
{ return StrAns;
public void calculate()
{ switch (op)
{ case '+': answer=nbr1+nbr2;
break;
case '-': answer=nbr1-nbr2;
break;
case '*': answer=nbr1*nbr2;
break;
case '/': answer=nbr1/nbr2;
break;
convertAnswer();
// =============================== linked list ================================
class LkList
{ char[] operator = {'+','-','*','/','(',')'}; // operators used
LinkedList Express = new LinkedList(); // Linked list of expression
String StrExp = null;
String oper = ""; // operator
String number1 = ""; // first number used in expression
String number2 = ""; // second number used in expression
String answer = ""; // answer of expression
Exp TempExp; // Temporary expression
String Temp;
// Constructor
LkList (String e)
{ StrExp = e;
formList (); // expression turn into liked list nodes
trimList (); // remove spaces from linked list expression
public String toString()
{ return Express.toString();
public LinkedList getList();
{ return Express;
public String getAns()
{ return Express.get(0).toString();
public void ProcessExpress() // removing brackets
{ removeBrack();
private void formList()
{ int j = 0;
boolean lastOper = true;
for (j = 0 ; j < Express.length(); j++ )
{ if (!(belongTo(operator, StrExp.charAt (j))))
{ Temp = Temp + StrExp.charAt (j);
lastOperator = false;
if (belongTo(operator, StrExp.charAt (j)))
{ if ((StrExp.charAt (j) =='-') && (lastOperator))
{ Temp = "-";
lastoperator = false;
else
{ Express.add (Temp);
Temp = "";
Temp = Temp + StrExp.charAt (j);
Express.add (Temp);
Temp = "";
if (StrExp.charAt (j) == ')')
{ lastOperator = false;
else
{ lastOperator = true;
Express.add (Temp);
Temp = "";
private void trimlist ()
{ int sp = 0;
while ((sp !=-1))
{ sp = Express.indexOf ("");
if (sp !=-1)
{ Express.remove (sp);
private static boolean belongTo (char[] ar, char c)
{ for (int k = 0; k < ar.length; k++)
{ if (c == ar[k]) return true;
return false;
private boolean findBrack ()
{ if (Express.contains (")"))
{ return true;
return false;
private void removePoints (int pt1, int pt2 )
{ int range = (pt2 - pt1);
for (int j = pt2; j >= pt1; j--)
{ Express.remove (j);
private void processOperator (String Oper)
{ int point =-1;
while (Express.contains (Oper))
{ point = Express.indexOf (Oper);
oper = Express.get(point).toString();
number1 = Express.get(point-1).toString();
number2 = Express.get(point+1).toString();
TempExp = new Exp (number1, number2, oper);
TempExp.calculate();
answer = Temp.toString();
Express.add(point-1, point+1);
removePoints (point-1, point+1);
point =-1;
private void removeBrack()
{ int opBrack = 0;
int clBrack = 1;
int j = 0;
String Temp = "";
while (findBrack())
{ clBrack = Express.indexOf (")");
j = clBrack;
do
{ Temp = Express.get(j).toString();
if (Temp.charAT(0) =='(')
{ opBrack = j;
j--;
while (opBrack < 0);
number1 = Express.get(opBrack +1).toString();
number2 = Express.get(clBrack -1).toString();
oper = Express.get(opBrack+2).toString();
TempExp = new Exp (number1, number2, oper)
TempExp.calculate();
answer = TempExp.toString();
Express.add(clBrack+1, answer);
removePoints(opBrack, clBrack);
opBrack=-1;
clBrack=0;
private void removeDivide()
{ processOperator("/");
remMult();
private void removeTimes()
{ processOperator("*");
remAdd();
private void removeAdd()
{ processOperator("+");
remSub();
private void removeSub()
{ processOperator("-");
// ================================= help menu ============================
class JHelp extends JFrame
{ JTextArea textarea;
public JHelp()
{ super ("Help");
Container contentPane = getContentPane();
/* JPanel textPan1 = new JPanel (new BorderLayout());
textarea = new JTextArea ("How to use Nicks Calculator");
textarea.setWrapStyleWord(false);
JScrollPane textAreaPane1 = new JScrollPane (textarea);
textPan1.add (textarea, BorderLayout.CENTER);
contentPane.add(textPan1);
textarea.setEnabled(false); */
JLabel lab=new JLabel(new ImageIcon("helpmenu.jpg"));
contentPane.add(lab, BorderLayout.CENTER);
setBounds(400,200,400,400);
this.show();
// ================================ Splash Page =============================
class JSplash extends JFrame
{ public JSplash()
{ super ("Splash Page");
Container contentPane=getContentPane();
JLabel lab=new JLabel(new ImageIcon("nick.jpg"));
contentPane.add(lab, BorderLayout.CENTER);
setBounds(400,200,250,320);
this.show();Spot the difference:
public LinkedList getList();
public LinkedList getList()
Notice the semi-colon. Thats the problem -
DDNS: DDNS has been disabled........Need help figuring out error message
Already set up nannycam (Cisco WVC80N). Fowarding connection from port 80 to 1024 on router which is same as camera port. Have populated all necessary fields (email, TZO Key and domain name. Received Routers External IP Address, however when saved I receive following error message:
DDNS has been disabled
Bad Authentication - Username or Password - check setting and try again
I cant remotely connect to camera's server via my domain.
Help!!!What is the model number of your wireless router?
Open the setup page of the camera. Go to 'Options ' in the left panel. Enable the Alternate web port and port 1024. Save the settings. Make sure that you have entered the correct TZO settings.
Now open the port 1024 on your router for the IP address of the camera.
Check the Internet IP address on the router. Who is your Internet service provider? -
Need Help with this Error message in App World
hi, i just install the new version of app world. when i try to open my world or my account, i got this error message "THERE IS AN ISSUE WITH THE CURRENT SESSION. PLEASE LOGIN TO CONTINUE. (Error Id: 30702).
when i press Ok..nothing happen at all..anyone please help..i already try install the previous version app world but still the same.Hello azain
Welcome to the Community
Please check the Article below to help you solve the issue.
"Unable to login to your BlackBerry ID account" or "Unable to update your BlackBerry ID account info...
Goodluck and please let us know if it helps you
Ron
Click "Accept as Solution" if your problem is solved. To give thanks, click thumbs up Blackberry Battery Saving Tips | Follow me on Twitter -
Please help me! Error message : java.lang.OutOfMemoryError
Hello, I am a new learner on Java ME. I have done a simple shooting game in Java ME. I am using multiple threads on that and when I run the program in Sun Java Wireless Toolkit, the error message "java.lang.OutOfMemoryError" appear. May I know what is the cause of this problem? Is it because of too many threads running at the same time or ..? Any suggested solution on this? Thanks.
Hello,
I try to assign all class object as null, but the problem still there. My game has 3 stages. For example, after the first stage, I would like to clear the memory buffer like the heap memory, then only load the second stage. Otherwise, the memory may not enough when the stages increased. So, is there any other way to clear the buffer for garbage collection?
In my game, it has a menu. The menu has the option like "New Game", "Help", "Exit". Whenever the game is start, the menu will add-in another option - "Continue", which will allows user back to the game and continue it.
Everytime when I select "New Game", the game will start running, and when I press for menu, the game will pause automatically and then show the menu list. In this case, the game is still in the memory, but in paused state. If I choose "New Game" from the menu, it means it will restart a new game.
My problem is that when I restart a new game, the heap memory still keeping the previous game. How could I delete the previous game's memory, so that whenever the new game is selected, the heap memory that store previous game would be cleared and the memory buffer will always store the current game only? -
Help with DW8 error messages please....
Suddenly my Dreamweaver 8 has ground virtually to a halt - I think might be since a recent DMX ActiveSlideshow update.
When load DW8 I get error message:-
While executing onload in ActSlideshow10-onStartUp.htm the following J'script error occurred:In file "ActSlideshow10-onStartUp"" Reference error:on startUp is not defined.
When I open any html file I get error message:
While executing onload in-onOpen.htm, the following Javascript error occurred;
In file ""-onOpen""
Reference error: on Open is not defined.
Other error messages constantly coming up:
1/The following translators were not loaded due to errors: ASP.htm: has configuration information that is invalid. Server Model SS1.htm has configuration information that is invalid. XSLT.htm has configuration information that is invalid.
2/While executing on-load in TeamAdminTempDelete.html the following Javascript error occurred in file “”TeamAdminTempDelete”” Reference Error: delTempFile is not defined.
Grateful for any help you can give me. I tried to reload DW but it made no difference.Thanks Murray, I worked through the suggested troubleshooting remedies and it wasn't solving the problem, but I was learning quite a lot about the functionality of DW8 as I did it
Then I uninstalled the program and re-installed it and thankfully the JavaScript themed alerts have stopped.. I haven't reinstalled the DMX extensions yet, but previously de-selecting them hadn't made any difference.
Very grateful for your help. I'm up and running again....... -
ASP Error message: Invalid class string
Server object, ASP 0177 (0x800401F3)
Invalid class string
/asap/admin/insert.asp
I have seen that the installation of MSXML 2.0 may be the solution to this error message I am getting. How do I go about installing this? I have downloaded and thought I installed, but still get this message. Anybody else seen this and know of possible solution?
Please help...I just noticed the customer is on PL39 and the version I am on here is PL43. Could that be presenting a problem?
Thanks,
EJD -
How to solve error message in webui
Hi ,
Please find the attachment.Ho
I am getting this error in webui level. How to solve the error messages in webui level.
Item 30 : Access to changed configuration data is not possible.
What procedure i will follow can you tell me.
Regards,
SaiDear Sai,
please consider note 1647590, this note might help you tol solve the situation.
Best regards
Rene
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