Java.math package does not exist!!!

hi java experts, i really desperately need some help. ihave been trying to compile a java program i have written that imports the java.math package as i am using the BigInteger class. I am using SUN ONE STUDIO ME 4 and have j2se SDk installed. when i try to build the program in the IDE, it gives me an error message saying the java.math package does not exist. i can't understand why. i think it's an IDE problem. i tried mounting the filesystem and i mounted almost a million times in diff ways but it still can't compile. i can't find the directory of the java.math to mount into. anyway i tried to compile it at the command prompt and it can compile but with errors... so i figure that i do have the java.math class on my system just that the IDE jsut can't recognise it. i am at my wits end and gonna go mad if someone doesn't please help me.
adeline from singapore

Cross-posted at http://forum.java.sun.com/thread.jsp?thread=293132&forum=54&message=1155073

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package michaelchristopherp4db2;
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Compiler exception - package does not exist?

I am new to NWDS and J2EE. I followed the steps in the tutorial as indicated in the below link:
http://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sapportals.km.docs/library/netweaver-application-server/_netweaver-application-server/a-c/Creating%20your%20First%20J2EE%20Application.pdf
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#1.5 #001A6431E0FE0020000000750000155C0004B9B284863A19#1330076285575#com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl#sap.com/CalculatorEar#com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl#Guest#0##40C36AF65ECB11E18721000000978DDA#40c36af65ecb11e18721000000978dda-0#40c36af65ecb11e18721000000978dda#SAPEngine_Application_Thread[impl:3]_21##0#0#Error#1#/System/Server/WebRequests#Plain###application [Calculator] Processing HTTP request to servlet [jsp] finished with error.
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                                                 ^
G:/usr/sap/EPD/JC00/j2ee/cluster/server0/apps/sap.com/CalculatorEar/servlet_jsp/Calculator/work/jsp_Calculator1330076284538.java:42: package com.sap.examples.calculator.beans does not exist
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G:/usr/sap/EPD/JC00/j2ee/cluster/server0/apps/sap.com/CalculatorEar/servlet_jsp/Calculator/work/jsp_Calculator1330076284538.java:48: package com.sap.examples.calculator.beans does not exist
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                                                                         ^
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Thank you.
Brian

Perhaps I should give out more information about this problem.
The EAR file contains a WAR file and a JAR file.
The WAR file contains a JSP and it contains codes to refer to a java proxy class of package comp.sap.examples.calculator.beans.CalcProxy.
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I checked the structure of the WAR file using a zip tool.
At the base it contains this:
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Calculator.jsp (the JSP file)
Inside the WEB-INF folder is these:
classes (a folder)
web-j2ee-engine.xml
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Inside the classes folder is a tree of subfolders to describe the structure of the CalcProxy class:
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Why the compiler is not able to find the class file inside the JSP?

Error: microedition.io.* package does not exists

Been at this for a few days...frustration...funny.
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BUILD FAILED (total time: 4 seconds)
any information would be much appreciated. Thanks,
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By completing the process shown in below link and adding the bluecove jar file directly to the project as of the reply post suggests, all compilation errors were corrected.
http://forums.netbeans.org/viewtopic.php?t=22823&start=0&postdays=0&postorder=asc&highlight=microedition
Thanks me for point me in the right direction,
Me is happy.

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When you post code, click on the "code" label and paste the code between the code tags.
rnashting wrote:
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Import javax.servlet.* gives error "package does not exist"

I am working through Monica Pawlan's book "Essentials of Java PL".
My PC runs Windows2000 prof. I have downloaded and installed j2sdk-1_3_1_01-win.exe in c:\jdk1.3.1_01
I have downloaded and installed tomcat4.0 (jakarta-tomcat-4.0.zip) into c:\jakarta-tomcat-4.0
CATALINA_HOME is set to c:\jakarta-tomcat-4.0 and CLASSPATH is set to .;C:\jakarta-tomcat-4.0\common\lib\servlet.jar
I can compile an applet starting:
import java.awt.Color;
import java.awt.BorderLayout;
import java.awt.event.*;
import javax.swing.*;
//Class Declaration
class SwingUI extends JFrame implements ActionListener { ... }
but trying to compile my servlet starting:
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class ExampServlet extends HttpServlet { ... }
gives me the error (import javax.servlet.*) "package does not exist".
Any pointers on this immediate problem? and is my book out of date?
Many thanks,
James Towell

You downloaded the Java 2 SDK Standard Edition, but you need to also download the Enterprise Edition if you want to write programs that use enterprise features.

FTPClient Package does not exist?

I have an FTP program. I'm trying to use this package. Here is a link to the class package overview:
http://www.enterprisedt.com/downloads/ftp/doc/com/enterprisedt/net/ftp/FTPClient.html
When I attempt to compile, I get the error that the package does not exist. I am importing these packages:
import java.lang.Object.*;
import java.lang.*;
// This package causes the error
import com.enterprisedt.net.ftp.FTPClient.*;
Is there something I need to download, or some other package to import?
Thanks,
Logan

Hi,
I finally found the ftp.jar and downloaded it and put it in the /j2se/jre/lib/ext.
I can now compile with this import line:
import com.enterprisedt.net.ftp.*;
Now my problem is trying to get this to work:
String server = "192.168.1.100";
String user = "logan";
String passwd = "passwd";
try {
FTPClient ftp = new FTPClient(server);
} catch (IOException ex) {
System.out.println("Caught exception: "+ex.getMessage());
But I get this error when compiling:
unreported exception blah blah must be caught or declared to be thrown
Thanks.
- Logan

Imported package does not exist

Hello
I'm importing a package com.borland.jbcl.layout.* into my java
program to do some GUI layout but kept getting the error that the package does not exist. Can someone explain why and the solution to this problem please?
Thanks
Danny

If the class you are trying to import is in a .jar file, you need to add the jar to your classpath CLASSPATH=c:\dir1\...\MyJar.jar. If the file is in a directory you need to include the base directory in the classpath CLASSPATH=c:\basedir

Java.math package does not exist!!!

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