Mulugeta Maru

Yes. Thank you for you help. The problem is the way the class path is set up. I made changes to the class path and it works.

Maru

I am rather confused about this issue. I was able to compile the folllowing code:

public class ArithmeticDemo{ public static void main(String[] args){ //a few numbers int i = 37; int j = 42; double x =27.475; double y = 7.22; System.out.println("Variable values..."); System.out.println("i = " + i); System.out.println("j = " + j); System.out.println("x = " + x); System.out.println("y = " + y); //adding numbers System.out.println("Adding..."); System.out.println("i + j = " + (i + j)); System.out.println("x + y = " + (x + y)); //subtracting numbers System.out.println("Subtracting..."); System.out.println("i - j = " + (i - j)); System.out.println("x - y = " + (x - y)); //multiplying nubmers System.out.println("Multiplying..."); System.out.println("i * j = " + (i * j)); System.out.println("x * y = " + (x * y)); //dividing numbers System.out.println("Adding..."); System.out.println("i / j = " + (i / j)); System.out.println("x / y = " + (x / y)); //computing the reminder resulting from dividing numbers System.out.println("Computing remainder..."); System.out.println("i % j = " + (i % j)); System.out.println("x % y = " + (x % y)); //mixing types System.out.println("Mixing types..."); System.out.println("j + y = " + (j + y)); System.out.println("i * x = " + (i * x)); } }

When I try to run it I get above error. Any idea why?

My class pathe is set as follows:

set PATH=%PATH%;F:\j2sdk1.4.2_04\bin set JAVA_HOME=F:\j2sdk1.4.2_04 set CLASSPATH=.;F:\"." set CATALINA_HOME=F:\Tomcat5_0 set CLASSPATH=%CLASSPATH%;%CATALINA_HOME%\common\lib\servlet-api.jar set CLASSPATH=F:\Tomcat5_0\webapps\ATS\WEB-INF\classes\".";%CLASSPATH% set JBOSS_HOME=F:\JBOSS-3.2.3 set CLASSPATH=%CLASSPATH%;%JBOSS_HOME%\server\default\lib\javax.servlet.jar;%JBOSS_HOME%\MARU\WEB-INF\classes set PATH=%PATH%;F:\Ant\bin set ANT_HOME=F:\Ant set PATH=%PATH%;F:\jbdc\JBDB_COM set CLASSPATH=\path\to\mysql-connector-java-3.0.11-bin.jar;%CLASSPATH%

Thank you for you help.

Maru

Yes it is a CLASSPATH problem.I made changes to the CLASSPATH and it now works perfectly.

Thank you for your kind help.

Maru

I am not sure my CLASSPATH is properly set.

REM C:\SAMSUNG\MSCDEX /D:SSCD000 C:\SAMSUNG\MSCDEX /D:SSCD000 set PATH=%PATH%;F:\j2sdk1.4.2_04\bin set JAVA_HOME=F:\j2sdk1.4.2_04 set CLASSPATH=.;F:\"." set CATALINA_HOME=F:\Tomcat5_0 set CLASSPATH=%CLASSPATH%;%CATALINA_HOME%\common\lib\servlet-api.jar set CLASSPATH=F:\Tomcat5_0\webapps\ATS\WEB-INF\classes;%CLASSPATH% set JBOSS_HOME=F:\JBOSS-3.2.3 set CLASSPATH=%CLASSPATH%;%JBOSS_HOME%\server\default\lib\javax.servlet.jar;%JBOSS_HOME%\MARU\WEB-INF\classes set PATH=%PATH%;F:\Ant\bin set ANT_HOME=F:\Ant set PATH=%PATH%;F:\jbdc\JBDB_COM set CLASSPATH=\path\to\mysql-connector-java-3.0.11-bin.jar;%CLASSPATH%

The error message I am getting is that of cannot resolve symbol. I have to class as show below and when I try to compile ClickMe.java I get the error message:

clickme.java:6: cannot resolve symbol
symbol : class Spot
location: class ClickMe
private Spot spot = null;

clickme.java:28: cannot resolve symbol
symbol : class Spot
location: class ClickMe
spot = new Spot(RADIUS)
2 errors

public class Spot { public int size; public int x, y; public Spot(int intSize) { size = intSize; x = -1; y = -1; } }

import java.applet.Applet; import java.awt.*; import java.awt.event.*; public class ClickMe extends Applet implements MouseListener { private Spot spot = null; private static final int RADIUS = 7; public void init() { addMouseListener(this); } public void paint(Graphics g) { //draw a black border and a white background g.setColor(Color.white); g.fillRect(0, 0, getSize().width - 1, getSize().height - 1); g.setColor(Color.black); g.drawRect(0, 0, getSize().width - 1, getSize().height - 1); //draw the spot g.setColor(Color.red); if (spot != null) { g.fillOval(spot.x - RADIUS, spot.y - RADIUS, RADIUS * 2, RADIUS * 2); } } public void mousePressed(MouseEvent event) { if (spot == null) { spot = new Spot(RADIUS); } spot.x = event.getX(); spot.y = event.getY(); repaint(); } public void mouseClicked(MouseEvent event) {} public void mouseReleased(MouseEvent event) {} public void mouseEntered(MouseEvent event) {} public void mouseExited(MouseEvent event) {} }

Please note that I have no problem compiling a single class i.e. a class that does not refere to another class.

It is my understanding that when I compile ClickMe it automatically compiles Spot.

Thank you for you help.

Maru

Thank you. You may be right to point out that it may be a CLASSPATH issue. I am getting package javax.servlet does not exist etc.
This is how I set-up my class path:
set PATH=%PATH%;F:\j2sdk1.4.2_04\bin set JAVA_HOME=F:\j2sdk1.4.2_04 set CATALINA_HOME=F:\Tomcat5_0 set CLASSPATH=%CLASSPATH%;%CATALINA_HOME%\common\lib\servlet-api.jar;%CATALINA_HOME%\webapps\ATS\WEB-INF\classes;
The two java programs I am trying to compile are in ...\webapps\ATS\WEB-INF\classes directory.
I am not sure whether my set-up is right.
What is not clear for me is that when I try to compile Help.java it does compile without an error. What is going on?
Regards,
Mulugeta

I still get the same error message. It does not make sense at all. I can compile Help but not Hello, because referece to Help. Both files are in the same directory. When I try to compile Hello, javac should have compile both automatically, because they are in the same folder.
When I use BlueJ no problem. It is only when I try to do it on a command line.
Thank you for you help.
Maru

I must say thank you for trying to help me on this frustrating issue. I did change and now have the flowing code, which does give me the same error. I am not sure why. I did run the same code using BlueJ and it did compile no problem. I do not know why it does not compile when I do it at the command prompt. Any thoughts on this. I have not really used the command line very much. I am probably spoiled using BlueJ.
import java.io.*; import javax.servlet.*; import javax.servlet.http.*; public class Hello extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html"); PrintWriter out = response.getWriter(); String title = "Hello WWW again"; out.println(Help.headWithTitle(title) + "<BODY>\n" + "<H1>Hello WWW</H1>\n" + "</BODY></HTML>"); } }
import javax.servlet.*; import javax.servlet.http.*; public class Help { public static final String DOCTYPE = "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 " + "Transitional//EN\">"; public static String headWithTitle(String title) { return(DOCTYPE + "\n" + "<HTML>\n" + "<HEAD><TITLE>" + title + "</TITLE></HEAD>\n"); } }
Regards,
Maru

Sorry I did not respond on time. The error message is as follows:
hello.java:12: cannot resolve symol
symbol : variable help
location: class Hello
out.println(help.headWithTitle(title) +
I can compile help with no problem. It is when I try to compile hello the above error message is issued.
import java.io.*; import javax.servlet.*; import javax.servlet.http.*; public class Hello extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html"); PrintWriter out = response.getWriter(); String title = "Hello WWW again"; out.println(help.headWithTitle(title) + "<BODY>\n" + "<H1>Hello WWW</H1>\n" + "</BODY></HTML>"); } }
import javax.servlet.*; import javax.servlet.http.*; public class Help { public static final String DOCTYPE = "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 " + "Transitional//EN\">"; public static String headWithTitle(String title) { return(DOCTYPE + "\n" + "<HTML>\n" + "<HEAD><TITLE>" + title + "</TITLE></HEAD>\n"); } }
Regards,
Maru

I did change help.java to ServletUtilities.java and the reference in Hello.java. I still can not compile Hello java. I can compile ServletUtilities no problem. Since this two files are in the same folder it should not have been a problem.
Any idea why I can not compile Hello.java?
Regrards,
Maru

Sorry for not including the code:
Hello.java: import java.io.*; import javax.servlet.*; import javax.servlet.http.*; public class Hello extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html"); PrintWriter out = response.getWriter(); String title = "Hello WWW again"; out.println(Help.headWithTitle(title) + "<BODY>\n" + "<H1>Hello WWW</H1>\n" + "</BODY></HTML>"); } } Help.java: import javax.servlet.*; import javax.servlet.http.*; public class ServletUtilities { public static final String DOCTYPE = "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 " + "Transitional//EN\">"; public static String headWithTitle(String title) { return(DOCTYPE + "\n" + "<HTML>\n" + "<HEAD><TITLE>" + title + "</TITLE></HEAD>\n"); } }
Regrards,
Maru

I am trying to compile hello.java that uses help.java and both of them are in the same directory. I can comile help but when I try to compile hello.java I get the following error message:
cannot resolve symbol
symbol : variable help
location: class hello
Your help is appreciated.
Regards,
Maru

I added the %CATALINA_HOME%\webapps\ATS\ WEB-INF\classes directory to my classpath and it works.
Thank you very much for your clear answer to my question.
Regards,
Maru

I am sorry. How do I use tags? I never tried it before and please forgive me if it caused a problem.
Regrards,

Maru

In the past I did not have to deal with packages. Now I do and need you help please.
The class path is set as follows in autoexec.bat:
set PATH=%PATH%;F:\j2sdk1.5.0\bin
set JAVA_HOME=F:\j2sdk1.5.0
set CATALINA_HOME=F:\Tomcat5
set CLASSPATH=%CLASSPATH%;%CATALINA_HOME%\common\lib\servlet-api.jar
cd %CATALINA_HOME%\webapps\ATS\ WEB-INF\classes\wrox
Both my classes are in the wrox directory and one of them refers the other. When I run (at the command prompt F:\Tomcat5\webapps\ATS\WEB-INF\classes\wrox javac HelloWWW3.java) the one that refers the other both of them should be compiled automatically but instead I get an error:
Cannot find symbol variable ServletUtilities
Location wrox.HelloWWW3
out.println(ServletUtilities.headWithTitle(title)
HelloWWW3:
package wrox;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class HelloWWW3 extends HttpServlet
{
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
{
response.setContentType("text/html");
PrintWriter out = response.getWriter();
String title = "Hello WWW again";
out.println(ServletUtilities.headWithTitle(title) +
"<BODY>\n" +
"<H1>Hello WWW</H1>\n" +
"</BODY></HTML>");
}
}
ServletUtilities:
package wrox;
import javax.servlet.*;
import javax.servlet.http.*;
public class ServletUtilities
{
public static final String DOCTYPE =
"<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 " +
"Transitional//EN\">";
public static String headWithTitle(String title)
{
return(DOCTYPE + "\n" +
"<HTML>\n" +
"<HEAD><TITLE>" + title + "</TITLE></HEAD>\n");
}
}
Please note that I have no difficulty compiling code that does not refer to a custom class. For example I was able to run ServletUtilites and it did compile with no problem. Your help is very much appreciated.
Maru