[Basic For Loop] "cannot find symbol" in ForUpdate part
Dear All,
I wonder why the following is an error:
for ( int x=0; x < 10; x = y ) {
int y = x + 1;
}The formal specification is
for ( ForInitopt ; Expressionopt ; ForUpdateopt ) Statement
However, as specified in http://java.sun.com/docs/books/jls/third_edition/html/statements.html#14.14, and if you disassemble the bytecode,
"ForUpdate" part is always evaluated after the included statement,
In other words, it is evaluated as:
for ( ForInitopt ; Expressionopt ; ) {
Statement(s);
ForUpdateopt
}Or
for ( int x=0; x < 10; ) {
int y = x + 1;
x = y;
}So, the only reason I find "cannot find symbol" reasonable is just human convinience, but not technically correct.
What do you think?
Many thanks.
Very good asif but once again you have not answered
the question.
why?My answer may be partialy correct.But you answer is fully correct.
And don't appreciate me.I'm not good at programming(in Java) like you.
The variable y has been declared inside the loop so
you cannot access in the loop header.
int y = 0;
for ( int x=0; x < 10; x = y ) {
y = x + 1;
/code]
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Cannot find symbol for some jms methods
Hi, I'm new to JMS and am having trouble compiling the HelloWorld example. I am able to create a connection but for some reason I cannot create a session from the same connection. I am however able to call some of the other methods such as getClientID, start, and close. Below is a copy of what i have compiled so far (which is basically a copy of the example code), the error message I get, and what I have CLASSPATH set to. If my CLASSPATH is not set correctly, I would assume none of the code would compile which is very confusing. Any help is appreciated, thanks!
//Step 1:
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HelloWorldMessage.java:39: cannot find symbol
symbol : method createSession(boolean,int)
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1 error
# echo $CLASSPATH
.:/usr/java/default/j2sdkee1.3/lib/j2ee.jar:/usr/java/default/j2sdkee1.3/lib/:/root/MessageQueue/mq/lib/fscontext.jar:/usr/lib/jvm-exports/java-1.6.0-openjdk-1.6.0.0.x86_64/jndi.jar:/root/MessageQueue/mq/lib/jms.jar:/root/MessageQueue/mq/lib/imq.jar:/root/MessageQueue/mq/lib/jaxm-api.jar:/root/MessageQueue/mq/lib/imqxm.jar:/root/MessageQueue/mq/lib/imqservlet.jar
Edited by: 883631 on Sep 6, 2011 4:03 PMYou have an old j2ee.jar from 1.3 in your CLASSPATH.
Can you move jms.jar and imq.jar in front of that old j2ee.jar?
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8 errorsWhat is the problem?... Any help will be appreciatedRead the message. It cannot find the addElement() method on class java.util.ArrayList.
Just consult the javadoc of the class used for details about the class: [http://java.sun.com/javase/6/docs/api/java/util/ArrayList.html].
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"Cannot find Symbol" error message
I have a "cannot find symbol" error message on line 5 below in
the driver class.
Thank you for your assistance
1 public class GameLauncher
2 {
3 public static void main(String[] args)
4 {
5 GuessGame game = new GuessGame();
6 game.startGame();
7 }
8}
public class GuessGame
public void startGame()
Player p1;
Player p2;
Player p3;
int guessp1 = 0;
int guessp2 = 0;
int guessp3 = 0;
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boolean p2isRight = false;
boolean p3isRight = false;
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if (guessp2 == targetNumber)
p2isRight = true;
if (guessp3 == targetNumber)
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System.out.println("We have a winner ! ");
System.out.println("Player one got it right? " + p1isRight);
System.out.println("Player two got it right? " + p2isRight);
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System.out.println("Game is over ! ");
break; //game is over so break out of loop
else
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} // end of if/else
} // end of loop
} // end of startGame() method
} //end of class
public class Player
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public void guess()
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---------------------------------------------------------------Thank you . You were right . I didn't set up the classes correctly.
I corrected a few other errors and the program runs ok !
Below is the corrected code and the output
public class GameLauncher
public static void main(String[] args)
GuessGame game = new GuessGame();
game.startGame();
/* One possible set of output is
I'm thinking of a number between 0 and 3....
I'm guessing 1
I'm guessing 3
I'm guessing 0
Player one guessed 1
Player two guessed 3
Player three guessed 0
We have a winner !
Player one got it right? true
Player two got it right? false
Player three got it right? false
Game is over !
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public void startGame()
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Player p3 = new Player();
int guessp1 = 0;
int guessp2 = 0;
int guessp3 = 0;
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boolean p2isRight = false;
boolean p3isRight = false;
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p2.guess();
p3.guess();
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Cannot find symbol: trying to index a method output
The problem appears at the end of the code
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//Die Seiten des Dreiecks
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//int[] NachB1=
//int[] NachC1=
//int[] NachA2=
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public class Punkt
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LinkedList nachbarn = new LinkedList();
Punkt(int a, int b){
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int[] getposition() { return position; }
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position[1]+=c; position[2]+=d; }
}Anm: nachbarn = neighbours
I am trying to calculate the vectors, to calculate the scalar products, to get the cos of the angle, to check for certain conditions occuring XD
This class is part of an idea for a certain 2D physics system, basically instead of using collision checks or forcefields I connect the points with a network of lines
and only let the points interact with their direct neighbours while also allowing "signals"to travel trough connections.
Why do I do this? So that the O(n)= n (the needed processing power is only linearly dependant on number of points)
Whats the challenge? Well its not easy to find conditions for reconnections so that points that are connected are relaitvely near to each other.
Why such imprecision? Game phsysics does not always have to be precise besides when I operate with a large number of points things smoothen up statistically.
Game physics? I have some interest in artificial life this system is part of me trying to write an artificial life simulation.
Of course my current version is pretty clumsy but i hope it can be streamlined for processing power.I guess you interpreted "post" as this topic, when I meant the reply I gave you, then it would make sense you assume I have withold information.
Cause there really is no specific information for me to provide, it was a simple forward problem of a cannot find symbol error.
(I know that help can only be provided with enough information, thats why I gave you the whole code stated my intentions in the title as well as additional text etc., so you say thats the wrong "kind" of information?)
As for your argument against compiling I must admit I do not understand it cause its a copy, paste and click action to compile the code.
Ah but well thats not so important did not want to ruin your mood actually found the solution :)
int[] nachA1= {(((Dreieck) n[3]).getside(this))[1] -zwei[1], (((Dreieck) n[3]).getside(this))[2]-zwei[2]};Edited by: casualPhilosoph on Jan 23, 2009 2:28 PM -
Java Studio Enterprise 8.1 and jdk1.6 - cannot find symbol
Hi,
I am using subj. The problem I have is that I declared 2-3 classes with methods in one package. I made an object of the class and use intellisense to navigate to the method I need but when I try to compile the code I have "cannot find symbol" error on the method I intellisensed to. It seems to me that it is IDE problem.
Does anyone know how to work around it?
The code is below, in case you are interested.
package webservice;
import java.io.*;
public class Main {
/** Creates a new instance of Main */
public Main() {
* @param args the command line arguments
public static void main(String[] args) {
String filename = null;
String timestamp = null;
try {
Q q = new Q();
timestamp = "2007-06-01";
QList ql = q.getList(timestamp);
System.out.println("--------------Ok-------------");
catch(Exception e) {
System.out.println("An Exception thrown in Main(). e = "+e.toString());
package webservice;
public class Q {
public Q() {
public QList getList(String timestamp) {
QList result = null;
return result;
Thanks,
DmitryThanks for that Kris.
I found the root of my problem. In this example I used a remote webservice to retrieve some data. It happened to be that the generated class file from wsdl and my custom class had the same name.
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Hopefully it will help someone else having the same problem.
Dmitry -
Newbie question: cannot find symbol symbol: class STRING
I've just decided to teach myself some java, and on my first try something's going wrong and I don't know what it is.
I'm currently doing this tutorial: http://java.sun.com/docs/books/tutorial/uiswing/learn/example1.html
and everything is good until I try to compile it and I get this error in the cmd
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cannot find symbol
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****** City ********
package hw01;
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public final String name;
public final String country;
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// throw new RuntimeException ("Not implemented yet.");
this.name = name;
this.country = country;
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this.country = country;
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this.sisters[i] = sisters;
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// throw new RuntimeException ("Not implemented yet.");
for (int i = 0; i < sisters.length; i++) {
this.sisters[i] = sisters[i];
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// throw new RuntimeException ("Not implemented yet.");
return this.name;
public String getCountry ()
// throw new RuntimeException ("Not implemented yet.");
return this.country;
public City [] getSisters ()
// throw new RuntimeException ("Not implemented yet.");
return this.sisters;
******** SisterCities *********
package hw01;
import java.util.LinkedList;
public class SisterCities
public final LinkedList cityList;
public SisterCities ()
// throw new RuntimeException ("Not implemented yet.");
public void addCity (City city)
// throw new RuntimeException ("Not implemented yet.");
this.cityList.add(city);
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// throw new RuntimeException ("Not implemented yet.");
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Cannot find symbol class entry
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^
1 error
this is what i get when i try to compile this code, its the lowest part thats getting errors:
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.\ListGraph.java:26: cannot find symbol
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location: class MapI don't get the same error, so I'm not sure what code you are actually trying to compile. Do you happen to have defined another class named Map in the default package?
Also, please use code tags when posting code. Example: import java.util.*;
import java.util.Map.*;
import java.util.Map.Entry;
class ListGraph{
private HashMap<Stad,List<ListEdge>> nodes =
new HashMap<Stad,List<ListEdge>>();
public void addNode(Stad ny){
nodes.put(ny, new ArrayList<ListEdge>());
public void connect(Stad from, Stad to, String n, int v){
List<ListEdge> fromList = nodes.get(from);
List<ListEdge> toList = nodes.get(to);
ListEdge e1 = new ListEdge(to, n, v);
fromList.add(e1);
ListEdge e2 = new ListEdge(from, n, v);
toList.add(e2);
public String toString(){
String ret = "";
for(Map.Entry<Stad,List<ListEdge>> me : nodes.entrySet())
ret += me.getKey()+": "+me.getValue()+"\n";
return ret;
class Stad {}
class ListEdge{ ListEdge(Stad s, String str, int i) {} }~ -
Cannot find Symbol :class CLOB
Hi,
I am using JDK1.5.0_06 and Oracle8.1.7.
When i compile java program I am getting the following error
cannot find symbol
symbol : class CLOB
I have added classes12.zip into classpath.
Can anybody tell me why this errpr comes? Is there any other files instead of classes12.zip to be added (since its JDK1.5 version? )
Thanks in advance
neemayou have mentioned about the class "studentList" but that class is not to be found in the code you have pasted. its instead "ListTest". And the "menu" function seems to b a part of "ListTest" class. Can you provide the structure of the classes "studentList" and "Student" so that the problem can be more clearly understood?
also you are using the variable "Stdin" in the line int choice = Stdin.readInteger(); where as you have not declared this variable.
in the "switch" statement you are calling two different functions for the same case "3" where as it should be "case 3" and "case 4" respectively.
in the "main" you are calling the "menu" function without any parameter while you actually want to pass argument of type "studentList". -
Java Error : cannot find symbol , symbol : class (jdk 1.6.0)
Dear All,
Please help me.
I am running javac from a .bat file and i set the classpath in the bat file as follows.
echo on
:start
set classpath = "C:\Program Files\Java\jdk1.6.0\bin;"
set classpath = "C:\Program Files\Java\jdk1.6.0\jre\..\lib\tools.jar;C:\Program Files\Java\jdk1.6.0\jre\lib\rt.jar;C:\Program Files\Java\jdk1.6.0\jre\lib\i18n.jar;C:\Program Files\Java\jdk1.6.0\jre\lib\sunrsasign.jar;C:\Program Files\Java\jdk1.6.0\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.6.0\jre\lib\jce.jar;C:\Program Files\Java\jdk1.6.0\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.6.0\jre\classes;C:\Program Files\Java\jdk1.6.0\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.6.0\jre\lib\ext\ldapsec.jar;C:\Program Files\Java\jdk1.6.0\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.6.0\jre\lib\ext\mysql-connector-java-5.0.0-beta-bin.jar;C:\Program Files\Java\jdk1.6.0\jre\lib\ext\sunjce_provider.jar; C:\Program Files\Java\jdk1.6.0\ideset\system;C:\Program Files\Java\jdk1.6.0\ideset\system;C:\Program Files\Java\jdk1.6.0\studio\system;C:\Program Files\Java\jdk1.6.0\studio\modules\ext\j2ee-1.3.jar;C:\Program Files\Java\jdk1.6.0\studio\modules\ext\jaas-1.0.jar;C:\Program Files\Java\jdk1.6.0\studio\modules\autoload\activation.jar;C:\Program Files\Java\jdk1.6.0\studio\modules\ext\jms-1.0.2b.jar;C:\Program Files\Java\jdk1.6.0\studio\modules\ext\jta-spec1_0_1.jar;C:\Program Files\Java\jdk1.6.0\studio\modules\autoload\mail.jar;C:\Program Files\Java\jdk1.6.0\studio\modules\ext\AbsoluteLayout.jar;C:\Program Files\Java\jdk1.6.0\studio\modules\ext\sql.jar;C:\Program Files\Java\jdk1.6.0\studio\modules\ext\rowset.jar;C:\Program Files\Java\jdk1.6.0\studio\lib\ext\jdbc20x.zip;C:\Program Files\Java\jdk1.6.0\studio\modules\ext\servlet-2.3.jar;C:\Program Files\Java\jdk1.6.0\studio\beans\TimerBean.jar;c:\Program Files\Java\jdk1.6.0\ideset\tomcat401_base;C:\sms\com\;"
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symbol : class Connection
location: class mainP
Connection connection = new Connection(ipAddress, port);
I think it is because of some classpath error.
please advice me.......
VijuActually, you have NO CLUE what he's trying to doActually he said what he is trying to do in his posting. It's no mystery. But that's all the information that's available. If you know something that isn't posted here why not say so?
Your reply was a snide, rude, "You're stupid for doing it that way" answerMy reply was neither snide nor rude and implied none of what you impute to it. It was a proper and constructive suggestion. You are entitled to disagree with it, but that doesn't justify this immoderate outburst.
Bottom line is, you chose to be nastyBottom line is you're just making this up. You are imputing motives to me without evidence. Don't do that.
You are the type of person that makes searching forums and posting questions for assistance a near waste of time.I doubt that you'll find many regulars here that would agree with that assertion. When you have made over 16,000 posts here over ten years as I have, come back and we'll discuss it some more.
Go back to grade school and ...I suggest you try it yourself. You're not adding anything except noise to the discussion. Try curbing your temper, and while you're at it have a good look at the Code of Conduct for these forums. You're verging on personal abuse here.
And, additionally, I've used ANT in the past. Batch files are FAR AND AWAY easier to set up.In your opinion. I disagree entirely, and I have eleven years' experience with Java to back it up.
As for CLASSPATH, I haven't done anything about setting it beyond installing the JDK since about 1999, and it has a dot in it as we speak. -
"cannot find symbol" error - password checker class
I had to make a program to check a password to make sure it had two letters, at least eight characters, and only numbers and letters. I'm pretty sure I have all of the checking correct but I can't make use of the method I made to do it. here is my code:
if(password.LegalPassword())
System.out.println("You enterend a valid password!");
else
System.out.println("You have entered an invalid password!");
class LegitPassword
//constructor
public LegitPassword(String userPassword)
public boolean LegalPassword (String userPassword)
int digitCounter = 0;
for(int i = 0; i < userPassword.length(); i++)
//is character a letter or number?
if(!(Character.isDigit(userPassword.charAt(i))) || !(Character.isLetter(userPassword.charAt(i))))
return false;
//is the password at least 8 characters?
if(userPassword.length() <= 8)
return false;
//count the digits
if(Character.isDigit(userPassword.charAt(i)))
digitCounter ++;
if(digitCounter <= 2)
return false;
return true;
}oh, and the exact error is:
PasswordChecker.java:27: cannot find symbol
symbol : method LegalPassword()
location: class java.lang.String
if(password.LegalPassword())
^Here is the full code so that you can see how I declared password...
public class PasswordChecker
static Scanner console = new Scanner(System.in);
public static void main(String[] args)
String password;
System.out.println("Please enter a new password.");
System.out.println("Remember: Passwords must be at least eight characters"
+ " consisting of only numbers and letters with at minimal two numbers.");
System.out.print("Password: ");
password = console.nextLine();
//LegitPassword thePassword = new LegitPassword(password);
if(password.LegalPassword())
System.out.println("You enterend a valid password!");
else
System.out.println("You have entered an invalid password!");
class LegitPassword
public boolean LegalPassword (String userPassword)
int digitCounter = 0;
for(int i = 0; i < userPassword.length(); i++)
//is character a letter or number?
if(!(Character.isDigit(userPassword.charAt(i))) || !(Character.isLetter(userPassword.charAt(i))))
return false;
//is the password at least 8 characters?
if(userPassword.length() <= 8)
return false;
//count the digits
if(Character.isDigit(userPassword.charAt(i)))
digitCounter ++;
if(digitCounter <= 2)
return false;
return true;
}The error:
PasswordChecker.java:27: cannot find symbol
symbol : method LegalPassword()
location: class java.lang.String
if(password.LegalPassword())Are you suggesting I change the method, LegalPassword, to accept no parameters? -
"cannot find symbol class studentList" error
Hi I get this error
"cannot find symbol class studentList", but this class is at the same file and also it is in the same folder. so what's wrong .. and I checked the spelling it's the same.
I should create an object named myList of type studentList
and second, I call method menu() and pass it myList as actual parameter.
so I called the function menu which is should be in the main too
like this
myList.menu();
and menu method accepts as parameter an object of type studentList. and display the menu for the user to choose..
here is part my program:
public class ListTest
{ public void menu(Student L) // accepts parameter
System.out.println("");
System.out.println("Choose a number between 1 to 4");
System.out.println("1-Print Info of A Student ");
System.out.println("2-Print Info of All Students ");
System.out.println("3-Display grade of A Specific student");
System.out.println("4-Exit");
System.out.println("");
int choice = Stdin.readInteger();
while (choice != 5)
switch (choice) {
case 1:
L.PrintAStudent(int L);
break;
case 2:
L.PrintAll();
break;
case 3:
L.DisplayGPA();
break;
case 3:
System.exit(0);
break;
default:
System.out.println("wrong Number");
System.out.println("Enter a number between 1 to 4 ");
System.out.println("Enter 4 to Exit");
break;
System.out.println("");
System.out.println("Choose a number between 1 to 4");
System.out.println("1-Print Info of A Student ");
System.out.println("2-Print Info of All Students ");
System.out.println("3-Display grade of A Specific student");
System.out.println("4-Exit");
System.out.println("");
choice = Stdin.readInteger();
}// end method menu
public static void main(String args[ ])
{ studentList myList = new studentList();//myList object is created
myList.menu();
}//end main
}// end of class ListTest
you have mentioned about the class "studentList" but that class is not to be found in the code you have pasted. its instead "ListTest". And the "menu" function seems to b a part of "ListTest" class. Can you provide the structure of the classes "studentList" and "Student" so that the problem can be more clearly understood?
also you are using the variable "Stdin" in the line int choice = Stdin.readInteger(); where as you have not declared this variable.
in the "switch" statement you are calling two different functions for the same case "3" where as it should be "case 3" and "case 4" respectively.
in the "main" you are calling the "menu" function without any parameter while you actually want to pass argument of type "studentList". -
Cannot find symbol class error
hi there ,
i am creating a min class that links several classes and i am doing the following
public class Main{
public static void main(String[] args){
classOne a = new classOne();
classTwo b = new classTwo();
classThree c = new classThree();
// more classes with the same as above
i am saving all the classes in the same folder , and i am having this error twice with each line that i creat an instance for a class
cannot find symbol
symbol : class classOneare your classes all in the same package? do you in fact use packages?
Your best bet to get help here is by creating a Short, Self Contained, Correct (Compilable), Example or SSCCE. This is a small application that you create that is compilable and runnable, and demonstrates your error, but contains no extraneous, unnecessary code that is not associated with your problem. To see more about this and how to create this, please look at this link:
http://homepage1.nifty.com/algafield/sscce.html
Remember, this code must be compilable and runnable.
Also, if you do post your code, please use code tags so that your code will be well-formatted and readable. To do this, either highlight your code block and press the "code" button at the top above the message block or place the tag [code] at the top of your block of code and the tag [/code] at the bottom, like so:
[code]
// your code block goes here
[/code]
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