Give duke dollars
If you say you are going to give duke dollars, then give duke dollars. :o)
Ah, that is meant by this -
sorry, I have sometimes problems to understand the meaning of some saying - I am not a native english speaker. You are right - but, I guess, some newbies don't know how to award a good answer - I read this in a post, where a guy wants to award a reply, not knowing how to do that.
greetings Marsian
P.S.: I am not a Martian boy :) - this name is a fantasy name used in MUDs, derived from the Roman god of wars "Mars" and converted to a name in the same way as "Christ" is converted to "Christian".
Similar Messages
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Need help with creating a postfix evaluator WILL GIVE DUKE DOLLARS
I know this is long but it needs to be so that you may understand:
I was given a template for a class PostFixEvaluator and need to create a method for a postfix evaluator named evaluatePostfixExpression that reads the expression of single number digits and operands into a stringbuffer. I have an algorithm for the process which is :
a) append a right parentheis to end the postfix expression. when it is encountered no further processing is necessary.
b) if the right parenthesis is not encountered, read the expression from left to right. if the current char is digit then pust its int value on the stack otherwise if the char is an operator pop the two top elements off the stack into variables x,y. calculate y operator x. push the result of the calculation onto the stack.
c) when the right parenthesis is encountered, pop value off the stack. this is result of the postfix expression.
this is what i have, can you please let me know where i am going wrong?:
public class PostfixEvaluator
public static void main (String [] args)
StringBuffer expression = new StringBuffer(
JOptionPane.showInputDialog( " Enter a positive expression: " ));
int answer = evaluatePostfixExpression(expression); // I GET AN ERROR HERE
System.out.println(" The value of the expression is: " + answer + "\n");
System.exit(0);
public int evaluatePostfixExpression(String str) {
StringBuffer postfix = new StringBuffer(str);
StringBuffer digits;
IntegerStack is = new IntegerStack(256);
int x, y;
char current = postfix.charAt('0');
postfix.append(')');
for(int i=0; current != ')'; i++) {
if (Character.isDigit(current)) {
digits = new StringBuffer();
if (Character.isDigit(current)) {
do {
digits.append(current);
i++;
} while (Character.isDigit(current));
i--;
is.pushInt(Integer.parseInt(digits.toString()));
} else if (current == '+' || current == '-' || current == '*'
|| current == '/' || current == '^' ) {
y = is.popInt();
x = is.popInt();
is.pushInt(calculate(x, y, current));
return is.popInt();
private int calculate(int op1, int op2, char oper) {
switch(oper) {
case '+':
return op1+op2;
case '-':
return op1-op2;
case '*':
return op1*op2;
case '/':
return op1/op2;
case '^':
return (int) Math.pow(op1, op2);
return 0;
class IntegerStack extends StackInheritance
public int stackTop()
int temp = popInt();
pushInt(temp);
return temp;
public int popInt()
return ((Integer)super.pop()).intValue();
public void pushInt (int c)
super.push(new Integer(c) );last time i checked String was not the same as StringBuffer.
maybe you would like to turn your expression into a String?!!
for that you need to check the API, for what methods might help you on doing that...
just maybe you find in java.lang.StringBuffer's specification that it has some method called to_string() or something very similar....
then you could do the following:
int answer = evaluatePostfixExpression( expression.to_string() );of course "to_string" would need replacement by method name you find from the API... -
I badly need duke dollars. Help me please, Help...Help....!
10 Dukes on a single question? Must be seriously hard. Some people look to see whether there are Dukes available for a question, but a lot don't. My approach is to add Dukes and assign them only when people give good answers - certainly you look silly assigning 10 Dukes and getting the answer "Check your CLASSPATH", and I suspect most people would feel embarrassed getting 10 Dukes for that.
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Hi
I have some duke dollars which i have assigned to a post, but no one seems to answer me the question properly, So i am asking people to quickly push some valid answers for this and claim their worthy duke dollars.
To claim the duke dollars kindly go to this thread and answer it
9 duke dollars are available
http://forums.java.sun.com/thread.jsp?forum=45&thread=133596
Thanks
SwarajThe duke dollars are over.
Thanks
Swaraj -
I tried to assign Duke Dollars to my last post. It says that I have 50 dollars to assign. Whne I try to assign them I get a 500 Server error. i kept trying and it eventually displayed a stack trace stating the user has insufficient dollars. What Gives?
I'd tell you if there were some Dukes on offer.
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SDN Forum points vs Sun Forum Duke Dollars
I believe that a points system is a great way to encourage participation by the community in problem solving.
With the points system in SDN, however, there is room for abuse, for example, by having people you know award points to you on threads.
I personally like the points reward system (Duke Dollars) on Sun's Developer Forums. In this scheme, you work with credits. Every user is given a certain amount of points (Duke Dollars) when they join. When you post a question, you can assign a number of Duke Dollars up front from your available credit as a reward to entice responses. You can also accumulate more Dollars by answering threads which have Dollars assigned.
Every month, Sun gives a gift to the user who has accumulated the most points.
I'm not sure that this solves the problem of users not assigning points for valid help, but, because users are working with limited credit, it does force them to be careful when assigning points, and prevents abuse as that mentioned above.
I would like to hear what other people think about this scheme. Perhaps there are aspects I have not considered.
Regards,
MartinWould a moderator make it more positive?
Actually Craig went into each of the forums and published a "rules of engagement". Maybe that kind of a "sticky note" post would be the place to remind people about the inappropriateness of redundant questions (across various forums) and the confusion and poor sporting behavior associated with "copied" answers. I can ping Craig with that suggestion to add text if you think it makes sense to "remind" people in each of the respective forums.
Or..to be a little more provocative, we could suggest that community members who have a good track record of participation, collaboration, and exemplary attitude be given the moderator rights in forums where the activity volume might be too overwhelming for an SAP moderator alone to manage and given the rights to move content to a more appropriate thread.
This is what I meant about "self-policing". Also, perhaps the moderators (internal as well as SAP) could identify themselves in a sticky post and invite participants in those designated threads to track "abuses" or issues, thus identifying them and hopefully resolving them publically.
Strange, it reminds me that in old, Puritanical, America, of the 17th century community culprits were subjected to a public dunking or stocks when they broke the law. The purpose being that public condemnation sent a clear message to other "would be" misbehavers.... and thus deterred further bad conduct.
While a rather radical and unpleasant method it was an open way of dealing with abuses to the system.
Perhaps others can offer less extreme and more effective suggestions here
Marilyn -
Go to your "My Duke Dollars" and click on the link to "Duke Dollars Rewards Program Account Summary".
And??What does it give you because for me it gives memy
'profile management'?No. I get my list of dukes spent, gained, totaland
recent activity.I too. Sometimes. Other times, I get a 404 or a
log-in and my profile.Do you remember all the shenanigans with your user profile. How you had to confirm something or whatnot a couple of years ago so they could "centralize" and "streamline" the one Sun account login thingy?
That worked out well didn't it. Much better now.
Vote "Don't touch it!" in Sun's feedback poll http://forum.java.sun.com/thread.jspa?threadID=710736&tstart=0 Sun should fix the bugs in the forum software before fiddling around with the GUI. -
i am a new user to java forum,i want to know about the Duke Dollars
The FAQ there is a little out of date.
They don't give away prizes anymore like it says (I have heard from of at least one person who got something)
Since that time Duke dollars have become a bit of a joke.
Too many people were "cheating" with dukes - just creating throwaway names, and awarding themselves duke dollars.
You used to be able to see how many duke dollars a person had - which was a small indication of the "expertise" of the person. That was removed in one of the forum "upgrades"
So now you can't even use them for that. You can still issue them if you want to. It probably won't affect the answers though. -
Duke Dollars for the first to implement the JOSRTS Tech Test
See http://www.josrts.org/cgi-bin/ikonboard/ikonboard.cgi?act=ST;f=6;t=124
If the offered Duke Dollars aren't showing up, it's because I haven't figured out yet how to attach them to the post. Give me some time, it's the first time I've offered them. :-)The following errors were found:
The board administrator requires that all members log
in before viewing the boardSorry, that's just the way the board is set up. Feel free to create a login and lurk around.
For those of you unfamiliar with JOSRTS (http://www.josrts.org), it is an attempt by the community to create a Real Time Strategy game in Java. This challenge is meant for members of the project, but if anyone would like to join the project, feel free. -
10 Duke Dollars if you help me set up tutorial
After several posts to this forum w/o any success, I am now offering 10 Duke Dollars to get this problem fixed:
I am trying to work through the j2ee tutorial on a Windows XP platform, specifically the servlets section which requires me to build the bookstore1 example (chapter 11). I am having problems with using asant to compile and package the project. I have been at a complete standstill for about a week now because I cant get the example to run - Im tearing my hair out, so plese help me!!!
The command I am using is asant create-bookstore-war. This throws about 80 compilation errors because classes referenced within the source files are not found . I therefore know that the compiler cant find the classes (suggesting CLASSPATH problems), but I dont know what settings Im supposed to be using.
Some info for you:
I tried adding JAVA_HOME and J2EE_HOME to the environemt variables, pointing to the java sdk (inside the app server) and J2EE application server installation location respectively. This didnt work. Initially I had JAVA_HOME pointing to a seperate installation of the SE SDK I had, but since discovering the SDK inside the appserver, I uninstalled J2EE, J2SE SDK, and re-installed J2EE, using the enclosed sdk as JAVA_HOME. None of this solved my problem.
I think I know now that the environment variables are not anything to do with the tutorial - this is just for the locations of the J2EE and J2SE SDK command path files - is this correct? In which case, using J2EE_HOME and JAVA_HOME is just for shorthand declarations in the environemtn/system variables?
(As you can probably guess by now I have spent a lot of time trying out different things!!!).
I also tried setting the j2ee.home and j2ee.tutorial.home attributes in the build.propoperties file located in <INSTALL>/j2eetutorial14/examples/common. This didnt work. I also tried setting the admin username property in this file, and the corresponding password in the password file (cant remember offhand what its called). Again, no luck.
In another post, somebody asked for the following oputput from my system:
D:\J2EE\j2eetutorial14\examples\web\bookstore1>asant listprops
Buildfile: build.xml
listprops:
[echo] Path information
[echo] j2ee.home = C:\Sun\AppServer
[echo] env.Path = C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C
:\BORLAND\BCC55\BIN;C:\Sun\AppServer\jdk\bin;C:\Sun\AppServer\bin;
[echo] env.PATH = ${env.PATH}
[echo] Classpath information
[echo] classpath = .;D:\Packages;
[echo] Admin information
[echo] admin.password = ${admin.password}
[echo] admin.host = localhost
[echo] admin.user = admin
[echo] admin.port = 4848
[echo] https.port = 8181
[echo] Domain information
[echo] domain.resources = "domain.resources"
[echo] domain.resources.port = 8080
[echo] Database information
[echo] db.root = C:\Sun\AppServer/pointbase
[echo] db.driver = com.pointbase.jdbc.jdbcUniversalDriver
[echo] db.host = localhost
[echo] db.port = 9092
[echo] db.sid = sun-appserv-samples
[echo] db.url = jdbc:pointbase:server://localhost:9092/sun-appserv-samples
[echo] db.user = pbpublic
[echo] db.pwd = pbpublic
[echo] url.prop = DatabaseName
[echo] ds.class = com.pointbase.jdbc.jdbcDataSource
[echo] db.jvmargs = -ms16m -mx32m
BUILD SUCCESSFUL
Total time: 1 second
D:\J2EE\j2eetutorial14\examples\web\bookstore1>There must be somebody out there who has set this tutorial set up on Windows XP - please can you give me a dump of your system and environment variables, and any other settings I need (build.properties etc.).
Many thanksHeres the last couple of errors on running asant creat-bookstore-war. All errors are cannot resolve symbol, so im sure its a classpath problem.
I only have PATH properties set in the environment variables, and the set CLASSPATH only points to my own J2SE packages.
[javac] D:\J2EE\j2eetutorial14\examples\web\bookstore1\src\servlets\ShowCart
Servlet.java:147: cannot resolve symbol
[javac] symbol : class ShoppingCartItem
[javac] location: class servlets.ShowCartServlet
[javac] ShoppingCartItem item = (ShoppingCartItem) i.next();
[javac] ^
[javac] D:\J2EE\j2eetutorial14\examples\web\bookstore1\src\servlets\ShowCart
Servlet.java:148: cannot resolve symbol
[javac] symbol : class BookDetails
[javac] location: class servlets.ShowCartServlet
[javac] bd = (BookDetails) item.getItem();
[javac] ^
[javac] 68 errors
BUILD FAILED
file:D:/J2EE/j2eetutorial14/examples/web/bookstore1/build.xml:56: Compile failed
; see the compiler error output for details.
Total time: 8 seconds
D:\J2EE\j2eetutorial14\examples\web\bookstore1> and heres the build.properties file:
j2ee.home=C:\\Sun\\AppServer
j2ee.tutorial.home=D:\\J2EE\\j2eetutorial14
sunone.home=${j2ee.home}
admin.password.file=${j2ee.tutorial.home}/examples/common/admin-password.txt
admin.host=localhost
admin.user=colr
admin.port=4848
https.port=8181
domain.resources="domain.resources"
domain.resources.port=8080
db.root=${j2ee.home}/pointbase
db.driver=com.pointbase.jdbc.jdbcUniversalDriver
db.host=localhost
db.port=9092
db.sid=sun-appserv-samples
db.url=jdbc:pointbase:server://${db.host}:${db.port}/${db.sid}
db.user=pbpublic
db.pwd=pbpublic
url.prop=DatabaseName
ds.class=com.pointbase.jdbc.jdbcDataSource
db.jvmargs=-ms16m -mx32m Thanks. -
Cheap problem with duke dollars
i have 17 duke dollars but i can not give then
along with questions i ask...
what to do...At the top of the thread, you should see a link saying "assign Duke Dollars". Click on this, and select how many from the drop-down box. Then click on the button "Assign Duke Dollars".
Next go back to the thread, and by each person's name you should see a little picture of a Duke with a green +. Click on that to assign Dukes to that person. -
How do you add Duke Dollars to a post???
How do you get the little Duke Dollars thingy to show up next to your post? There are no buttons to do so on the page where I'm ttyping this, nor on the preview page. Nor does it say anything about it in the Duke Dollars FAQ.
Oh never mind! I saw the option to add Dukes appear after the message was posted.
IMHO you should be able to add Dukes either on the form or the preview page. -
Using WAIT to repeatedly check a file !!Duke dollars!!
I have created this method, it is supposed to read a text file when a button is pressed after i have allocated an amount of time to check the text file. the text file must be checked every 2mins or so to see if there have been any changes!
i have some code here but 'wait(10000)' doesnt seem to have any effect!
can anybody help
theres 15 duke dollars in it for the best solution
cheers everyone
private void polling()
try {
wait(10000);
} catch (Exception e){
try {
Stack male = new Stack();
Stack female = new Stack();
File esbian = new File("02May2002_Test_Facts.txt");
FileReader ond = new FileReader(esbian);
BufferedReader hecker = new BufferedReader(ond);
int ef;
String incident = "INCIDENT" ;
while (true)
String lum = new String();
String umber = "";
String olyfeck = hecker.readLine();
if (olyfeck == null)
break;
StringTokenizer tarman = new StringTokenizer(olyfeck);
while (tarman.hasMoreTokens())
umber = tarman.nextToken();
for( ef=0; ef < 1; ef++)
umber = umber.replace('\u0028' , '\u0020');
umber = umber.replace('\u0029' , '\u0020');
umber = umber.trim().toUpperCase();
if (umber.equals("INCIDENT" ) || umber.equals("EVENT") ||umber.equals("ALARM") || umber.equals("FAULTRECORD") || umber.equals("INTERPRETEDFAULTRECORD"))
lum = umber;
agentout.append("subscription succeeded: " + umber + "\r\n");
hecker.close();
catch(IOException efe)
System.err.println("ERROR: " + efe) ;
} // end of method pollingI have created this method, it is supposed to read a text file when a button is pressed after i have allocated an amount of time to check the text file. the text file must be checked every 2mins or so to see if there have been any changes!
i have some code here but 'wait(10000)' doesnt seem to have any effect!
can anybody help
theres 15 duke dollars in it for the best solution
cheers everyone
private void polling()
try {
wait(10000);
} catch (Exception e){
try {
Stack male = new Stack();
Stack female = new Stack();
File esbian = new File("02May2002_Test_Facts.txt");
FileReader ond = new FileReader(esbian);
BufferedReader hecker = new BufferedReader(ond);
int ef;
String incident = "INCIDENT" ;
while (true)
String lum = new String();
String umber = "";
String olyfeck = hecker.readLine();
if (olyfeck == null)
break;
StringTokenizer tarman = new StringTokenizer(olyfeck);
while (tarman.hasMoreTokens())
umber = tarman.nextToken();
for( ef=0; ef < 1; ef++)
umber = umber.replace('\u0028' , '\u0020');
umber = umber.replace('\u0029' , '\u0020');
umber = umber.trim().toUpperCase();
if (umber.equals("INCIDENT" ) || umber.equals("EVENT") ||umber.equals("ALARM") || umber.equals("FAULTRECORD") || umber.equals("INTERPRETEDFAULTRECORD"))
lum = umber;
agentout.append("subscription succeeded: " + umber + "\r\n");
hecker.close();
catch(IOException efe)
System.err.println("ERROR: " + efe) ;
} // end of method polling -
How do I award Duke dollars to the best respondent to my question?
After you post a question, there will be a hyperlink like "assign duke dollar" in the page of your post. Follow it to assign the duke dollar to your question. To reward the duke dollar to the response, you have to log in first, open your post, then you can see a icon in front of every repsponse, you can click the one you want to reward.
-
I wanna assign you ALL my Duke Dollars....
...for a new question i have BUT b4 I can do that I need to retrive back the duke dollars from my earlier messages that haven't been answered and have my dollars gathering dust...how on earth do i do that?
Silkm I have no issues with assigning you all my dukes from all those earlier questions...just go there, type anything and I will assign them to you if u can solve my query...
It's gotta do with setting the classpath...and yes, i have already been thru google and forums here...
This is what i do:
- Start>Control Panel>System>Advanced>Environment Variables
- Click on Path in the System Variables section
- Click Edit and add C:\Program Files\Java\j2re1.4.1_01\bin AFTER %SystemRoot%\system32;%SystemRoot%;%SystemRoot%\System32\Wbem;c:\Program Files\Common Files\Adaptec Shared\System;
- Next I go to DOS and get my C prompt to C:\Program Files\Java\j2re1.4.1_01\bin
- I type javac helloworld.java and ENTER
- I get "javac is not recognised as an internal or external command, operable program or batch file"
So then I go back to Start>Control Panel>System>Advanced>Environment Variables
- This time I click on New in the "User Variables for Gaurav" section(that's me) - after all i am logged in as Gaurav on my XP machine!
- I type Path in Variable Name and C:\Program Files\Java\j2re1.4.1_01\bin in Variable Value
- Save
- goto DOS
- type helloworld.java and get "javac is not recognised as an internal or external command, operable program or batch file"
BTW i have installed j2re-1_4_1_01-windows-i586 on a XP machine
HELP!
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