Problem to compile .java class

hi,
i'm using/creating a package of classes....and as per my knowledge there is no need to write explicit import if u r importing/using an instance of class1 in other class2 in the same package.....
I'm doing the same.....
but the problem arrises here that....while compiling class2 the error occures..........
D:\tomcat\webapps\Books\WEB-INF\classes\BookForm.java:6: cannot resolve symbol
symbol : class Book
location: class BookForm
private Book book =new Book();
why so????? as i have included the package in CLASSPATH also..........
PLZ reply....
.....Amita

You don't need to import classes that are in the same package but they do need to be in the classpath. My guess is that you are compiling BookForm.java from the D:\tomcat\webapps\Books\WEB-INF\classes directory. Either add "D:\tomcat\webapps\Books\WEB-INF\classes" explicitly to your classpath or add a dot (".") to your classpath.

Similar Messages

Suffering an complie error when trying to compile java class in EBS11i

Hi,
When I trying to compile java classes with which imported the HttpServletResponse class, will get the follow error message:
package javax.servlet does not exist
cannot resolve symbol
symbol : class HttpServletResponse
It seems the javax.servlet package is not included in the classpath. But I checked the $CLASSPATH, it seems no problem.
echo $CLASSPATH
/u02/applvis/viscomn/util/java/1.4/j2sdk1.4.2_04/lib/tools.jar:/u02/applvis/viscomn/util/java/1.4/j2sdk1.4.2_04/lib/dt.jar:/u02/applvis/viscomn/util/java/1.4/j2sdk1.4.2_04/jre/lib/charsets.jar:/u02/applvis/viscomn/util/java/1.4/j2sdk1.4.2_04/jre/lib/rt.jar:/u02/applvis/viscomn/java/appsborg2.zip:/u02/applvis/visora/8.0.6/forms60/java:/u02/applvis/viscomn/java
Does anyone know the reason?
environment: ebs 11i
Thanks&Regards,
Xiaofeng

resolved this issue.
1. Edit $APPL_TOP/admin/adovars.env file -
Add the following jar files to the AF_CLASSPATH line -
Full path of /...../iAS/Apache/Jsdk/lib/jsdk.jar
Full path of /...../iAS/Apache/Jserv/libexec/ApacheJServ.jar
2. Bounce the concurrent manager in order to have the changes take effect.

Ant or what tool to compile Java Classes

For the past year I have been using Windows command window to compile Java Classes for my Servlets, Java Beans and Helper classes. I use Cold Fusion studio as my IDE for creating the Java classes. All of my Web Applications use MVC for Forms feeding small databases and I only have around 7 to 10 class files per Web application.
Should I start to use Ant and/or what is recommended so I can keep up with current technology instead of using Windows Command Window to compile my Java classes?

Try the following link.
https://www.sdn.sap.com/irj/sdn/downloaditem?rid=/library/uuid/cfc19866-0401-0010-35b2-dc8158247fb6
The download in the above link has NWDS and portal as well. Unzip the file and install NWDS studio.

Dynamically Create and Compile Java Classes

Hi,
I have a requirement to dynamically create and compile Java classes and would like some advice on the best method to do so.
Basically the project I am working on involves creating "Factors". Factors are items that have both attributes and weights so for example Factor A could have attribute B with weight 0.76, and attribute C with weight 1.33. There are a number of methods common to all factors such as calculateTotal, identify etc etc.
At the moment the application has 5 factors, but there is a requirement to dynamically add and remove factors on the fly.
I current solution I have been considering is using XML to describe the new class, build up the class and compile it; something along the lines of what is descibed at
http://www.javaworld.com/javaworld/jw-02-2002/jw-0201-xslt_p.html
however i would like to consider all options.
Any help with this is greatly appreciated.

You want to dynamically create and compile Java classes.
I would try the following:
(1) Write the Source code of the new class into a text file with the name MyNewClass.java
(2) compile this new .java-file with Runtime r = getRuntime();
try {
r.exec ("javac MyNewClass.java");
} catch (IOException e) {
System.out.println("ooops " + e.getMessage());
} (3) somehow try to load that new class, maybe using ClassLoader cl = ClassLoader.getSystemClassLoader();
cl.loadClass("MyNewClass");

Problem When Import Java Class -compilation error

Hi all
I made a java class that has methods to return Screen width and Height .
package tarek;
import java.awt.Dimension;
import java.awt.Toolkit;
public class Screen
Dimension dim ;
public Screen()
dim = Toolkit.getDefaultToolkit().getScreenSize();
public double getWidth()
double w = dim.getWidth();
return w;
public double getHeight()
double h=dim.getHeight();
return h;
I made the jar file " screen.jar" and make it ready to use in form builder
I opened form builder and make import java class (From program>import java class>choose the class anc click import)
The class now imported successfully and the PL/SQL package body is:
PACKAGE Screen /* tarek.Screen */ IS
-- DO NOT EDIT THIS FILE - it is machine generated!
-- Constructor for signature ()V
FUNCTION new RETURN ORA_JAVA.JOBJECT;
-- Method: getHeight ()D
FUNCTION getHeight(
obj ORA_JAVA.JOBJECT) RETURN NUMBER;
-- Method: getWidth ()D
FUNCTION getWidth(
obj ORA_JAVA.JOBJECT) RETURN NUMBER;
END;
Now I made a button on the form and i WRITE THIS CODE TO INVOKE THE CLASS on when_button_pressed
DECLARE
vScreen_Class ORA_JAVA.JOBJECT;
BEGIN
vScreen_Class := SCREEN.NEW;
END;
My problem is I have compilation error
error 306 AT LINE 5 , COLUMN 25
wrong number or types of argument in call to "NEW"
I do not know what is the reason of this compilation error?
Is it because the method in java return "double datatype" while in oracle return "number datatype"
Please help
Edited by: [email protected] on Dec 28, 2009 10:24 AM

Sarah, I ca not move my thread to JDeveloper because it is not java issue. The problem is with my PL/SQL code and the way I make Import Java class to forms Builder. The Java code is OK.
Andreas Thank you so much for replying. In fact I made a full compile "Ctrl+Alt+K". but still error
The following is the package Body
PACKAGE BODY Screen IS
-- DO NOT EDIT THIS FILE - it is machine generated!
args JNI.ARGLIST;
-- Constructor for signature ()V
FUNCTION new RETURN ORA_JAVA.JOBJECT IS
BEGIN
args := NULL;
RETURN (JNI.NEW_OBJECT('tarek/Screen', '()V', args));
END;
-- Method: getHeight ()D
FUNCTION getHeight(
obj ORA_JAVA.JOBJECT) RETURN NUMBER IS
BEGIN
args := NULL;
RETURN JNI.CALL_DOUBLE_METHOD(FALSE, obj, 'tarek/Screen', 'getHeight', '()D', args);
END;
-- Method: getWidth ()D
FUNCTION getWidth(
obj ORA_JAVA.JOBJECT) RETURN NUMBER IS
BEGIN
args := NULL;
RETURN JNI.CALL_DOUBLE_METHOD(FALSE, obj, 'tarek/Screen', 'getWidth', '()D', args);
END;
BEGIN
NULL;
END;
---------------------------------------------------------------------------------

Error while compiling java class (ora-29535 source requires recompilation)

Hello. I`m new with oracle and i`m having a problem with java classes. Few days ago i loaded java classes (loadjava) from jar file(biojava3-structure-3.0.2.jar) and compiled ( everything compiled with status valid). Now i`m writing my own class and i can`t import classes from biojava3. I`m getting error:
Projekt:7: cannot access org.biojava.bio.structure.Atom
bad class file: null
class file has wrong version 50.0, should be 49.0
Please remove or make sure it appears in the correct subdirectory of the classpath.
import org.biojava.bio.structure.Atom;
I have tryed to change jdk version in netbeans from 1.7 to 1.6. I created java class in sql plus That still not resolved my problem.
Please help me.

consider posting in Java forum instead of Database forum
https://forums.oracle.com/forums/category.jspa?categoryID=285

Problems Creating a Java Class using a webservice with certificate

hi,
i'm developing a java class that call's a webservice that needs a certificate, i'm not used to work with java, last time was 10 years ago, so i'm having some troubles because of the certificate.
I already add the certificate using java control panel > Security > Certificates. When testing i get the following error: IOException (java.io.IOException: subject key, Unknown key spec)
I think I need to define the certificate in my class, but i'm having a lots of trouble with the samples that i found over the internet, nothing works and i'm running out of time.
This is my Class
create or replace and compile java source named "FishInfoAt" as
import java.net.*;
import java.io.*;
import java.security.*;
public class FishInfoAt
     public FishInfoAt()
     public static String send(String urlfishinfoat, String mensagem, String mensagem1, String mensagem2, String mensagem3)
          // Init
          String response = "";
          String msgtotal = mensagem+mensagem1+mensagem2+mensagem3;
          String a = "";
          HttpURLConnection conn = null;
          try{
               URL url = new URL(urlfishinfoat);
               conn = (HttpURLConnection) url.openConnection();
               conn.setRequestMethod("POST");
               conn.setRequestProperty("Content-type", "text/xml; charset=utf-8");
               conn.setRequestProperty("SOAPAction", "https://servicos.portaldasfinancas.gov.pt:401/sgdtws/documentosTransporte/");
               conn.setRequestProperty("Content-Length","" + msgtotal.length());
               conn.setDoOutput(true);
               conn.setDoInput(true);
               conn.connect();
               OutputStream out = conn.getOutputStream();
               out.write(msgtotal.getBytes());
               out.flush();
               InputStream in = conn.getInputStream();
               int value;
               while( (value = in.read()) != -1)
                    response+=(char)value;
          catch(Exception e)
response = ("*** ERROR - IOException (" + e.getMessage() + a + ")");
return response;
/

Hi Deepak,
Could you please let us know upto which line your code is going safe. Try printing the value in the structure before you send that to the method GetUGEntity().
I am not too sure that would be a problem. But I have faced a problem like this, wherein I tried to access a structure for which I have not allocated memory and hence got exception because of that.
Since your JNI code seems to be error free, I got doubt on your C part. Sorry.
Dhamo.

Problem in finding java class file

I am writting an application using servlets , JSP and a simple java classfile. The simple java class file is for connection pool and the name of connection pool class is DBConnectionManager . I am using JavaWebserver2.0 and I have placed this class file in .\JavaWebserver2.0\classes
I am placing my servlets in .\JavaWebserver2.0\servlets folder. Since I am using wfm package so my servlets are placed in .\JavaWebserver2.0\servlets\wfm .
The problem is with compiling the servlet placed in wfm folder . I get the following error:-
TestServlet.java:11:cannot resolve symbol
symbol: class DBConnectionManager
location: class wfm.TestServlet
However when I try to compile this class in servlets folder and remove the package statement from the source file, it compiles and works very fine. I am having lot of confusion as the class DBConnectionManager is in classpath but even then compiler gives error. The same class when placed in servlets folder and package statement is removed works very fine.
Kindly help.

Hi,
Is the DBConnectionManager class declared public?
Does the TestServlet import the package that contains the DBConnectionManager?
This is all I can come up with, with the current information.
Cheers,
--Arnout

Silly problem when compiling main class

hi there,
i have a problem when compiling the main class.
the classes used by the main class are not recognized. the compiler can't locate the children classes.
i've already set the path and classpath environment variables, but there's still something missing.
how should i organize my folders in order to be able to compile the main class successfully, please?
thanks.

It would be good to have a precise problem description: the actual command used, folder structure and environment variable settings. Even if you have to construct a simple test case with a couple of classes that illustrates the problem.
In the absence of that some generic remarks:
The PATH variable typically points at all the folders that contain executable files that you use often. You can always access other executable files by specifying there full names.
The CLASSPATH variable is typically left unset.
When you use the java tools (like the javac compiler or the java runtime) you can specify the classpath that you want to use with -cp. This will override any CLASSPATH value. So in the simple case of two classes (Main and MyClass), you can put them in anywhere you like (for example C:\MyJavaStuff) and compile and run with:
{noformat}
C:\MyJavaStuff> javac -cp . *.java
C:\MyJavaStuff> java -cp . Main
{noformat}(Mind the dot after -cp))
By a "main" class I guess you mean a class with a static void main(String args[]) method, but I am suspicious of your "child" classes. Perhaps packages are involved. A precise description of the problem would help.

Compiling java classes from JDeveloper

Hi guys... perhaps this thred need to be created in JDeveloper fourm, it so please let me know.
I generated the classes from a web service which complie without errors and exedcute correctly. When trying to compile the main stub in Oracle database, I get an error "CONNOT RESOLVE SYMBOL" reviewing the java class, I see that extends the wrapper generated by Jdev. So I try to complie the extendable class, after trying to generate and compile it in the database, I get the error: "class$ is reserved for internal use" The code has the next line:
static java.lang.Class class$(java.lang.String param1)
Is this error launched from the oracle database? My guess is that maybe Im missing some library or something and thats why I can create the such Java Name procedures. But I will like if anyone could guide me through this exception.
Thanks
JP

Do you have .jar (or the .class) files created after the compile from JDeveloper?
If you do, you can load all of them using the command line utility loadjava:
$ loadjava
loadjava: Usage: loadjava [-definer] [-encoding encoding] [-force] [-genmissing] [-genmissingjar jar] [-grant grants] [-help] [-nousage] [-noverify] [-oci8] [-order] [-resolve] [-resolver resolver] [-schema schema] [-synonym] [-thin] [-tableschema schema] [-user user/password@database] [-verbose] classes..jars..resources..properties...
$

Using a Compiled Java Class --- Error

Hi All,
I am new to jsp tech. I am using 'Sun Java system application web server'.
I am getting following error when running ch06_02.jsp :
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: Unable to compile class for JSP
Generated servlet error:
[javac] /nfs/bxslnx/home/bxs/install/SUNWappserver/domains/domain1/generated/jsp/j2ee-modules/__default-web-module-server/org/apache/jsp/jsp/Examples/ch06/ch06_005f02_jsp.java:6: '.' expected
[javac] import ch06_01;
[javac] ^
[javac] 1 error
     org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:88)
     org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:337)
     org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:429)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:489)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:468)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:456)
     org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:516)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:307)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:251)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:860)
     sun.reflect.GeneratedMethodAccessor74.invoke(Unknown Source)
     sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     java.lang.reflect.Method.invoke(Method.java:585)
     org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:249)
     java.security.AccessController.doPrivileged(Native Method)
     javax.security.auth.Subject.doAsPrivileged(Subject.java:517)
     org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:282)
     org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:165)
note The full stack trace of the root cause is available in the Sun-Java-System/Application-Server logs.
My two files are :
ch06_01.java
public class ch06_01
public ch06_01()
public String msg()
return "Hello from JSP!";
ch06_02.jsp
<%@page import="ch06_01" %>
<HTML>
<HEAD>
<TITLE>Using a JavaBean</TITLE>
</HEAD>
<BODY>
<H1>Using a JavaBean</H1>
<% ch06_01 messager = new ch06_01(); %>
The message is: <%= messager.msg() %>
</BODY>
</HTML>
Please help me ....... I don't know whats going wrong . I m using Suse OS.
Thanks
Basant

Hi
You have to place the xml parsing library inside the lib directory under the WTK.
Mihai

Problem with compiling a class with a package

Hello,
I am trying to implement the package example from the SUN Tutorial. It can be found on the page: http://java.sun.com/docs/books/tutorial/java/interpack/QandE/packages-questions.html
I think I am doing like described but it doesn�t work. The files are stored like following on my machine:
C:\mygame\Shared\Utilities.java               (this file can be compiled)
C:\mygame\Server\Server.java                    (can�t be compiled)
C:\mygame\Client\Client.java                    (can�t be compiled)
I have no CLASSPATH set (but I tried), Java is installed in C:\Java\j2sdk
If I try to compile the file Client.java with javac the following error message occurs:
C:\mygame\Client>javac Client.java
Client.java:7: cannot resolve symbol
symbol : class Utilities
location: package shared
import mygame.shared.Utilities;
^
Client.java:23: cannot resolve symbol
symbol : variable Utilities
location: class mygame.client.Client
Utilities.printMsg("creating output stream");
^
Client.java:32: cannot resolve symbol
symbol : variable Utilities
location: class mygame.client.Client
Utilities.printMsg("writing current date");
^
3 errors
Are there any further prerequisites?
Thank you

Thank you for helping me. Now I am one step forward. Now I can compile each of my Java classes. But if I want to start them with java the following messages occurs. In addition I changed all pathes and class names to lower case.
C:\mygame\server>java server
Exception in thread "main" java.lang.NoClassDefFoundError: server
C:\mygame\server>cd ../client
C:\mygame\client>java client
Exception in thread "main" java.lang.NoClassDefFoundError: client
C:\mygame\client>cd ../shared
C:\mygame\shared>java utilities
Exception in thread "main" java.lang.NoClassDefFoundError: utilities
C:\mygame\shared>

Problem Calling a Java class from PLSQL function

We are calling a Java class through oracle function as
FUNCTION CalculateAMW (contributorid IN Number,
fromdate IN Date,OHorAnncoverage in Number,
OHAnncoverage in Number,
AppStatus in Number,
Status in Number)
RETURN Number
AS LANGUAGE JAVA
NAME 'AMWCalculations.calculateAMW
(long,java.sql.Timestamp,long,long,long,long) return double';
on execution of this function the sql prompt for the 1st time it is giving the output
but
if reexecute it is throwing and error ORA - 932 : Inconsistent
datatypes.
Recompiling the java class then it works for the 1st time and the next
time
we execute it throws error as explained above.
What could be the problem.
Thanks
Nanda Kishore

any idea???Yes, you are in the wrong forum, this is a Java forum, you have an ASP question, so i suggest you visit an ASP forum/site

Compiling java classes into dll

Hi,
Just trying to find out is there anyway I can compile the java classes into dll?
If I am to use JNI and C++, will the dll compiled be able to work well in a platform that does not have JVM?
Thank you.

Hi,
Just trying to find out is there anyway I can
an compile the java classes into dll?
No, but you can start the jvm and run your main class from a dll using jni. And, if you do that, you'll of course need a JVM on the client that'll be running your code.

Compiling Java Class in Workshop

May I ask a dumm question: how to compile a java class in Workshop? Application
Build or Project Build does not seem to do the work.
Thanks.

"Gerald Nunn" <[email protected]> wrote:
"Jeff" <[email protected]> wrote in message
news:406455b2$[email protected]..
May I ask a dumm question: how to compile a java class in Workshop?Application
Build or Project Build does not seem to do the work.Works fine for me, what type of project is the java file in?
Gerald
Thanks for the reply.
It is a web project. My Java files are under the following folder tree:
eSheetWeb\WEB-INF\classes
I have run Build Project against eSheetWeb few times. No errors but java files
just not getting compiled to class. Also is there a way to just compile without
run the entire Build?

Problem to compile .java class

Similar Messages

Maybe you are looking for