A simple java problem

when ever i try to run my java code i get an error
classnot found.
where as i have set path= c:\jdk\bin,classpath=c:\jdk\lib\tools.jar and JAVA_HOME=c:jdk
the file compiles correctly but it doesn't run.It used to run before very well but all of a sudden i don't know what happened....please help me...does it have to do with 2 different JRE's that r running

Try to include your current directory in your classpath.

Similar Messages

Problem while executing simple java program

Hi
while trying to execute a simple java program,i am getting the following exception...
please help me in this
java program :import java.util.*;
import java.util.logging.*;
public class Jump implements Runnable{
    Hashtable activeQueues = new Hashtable();
    String dbURL, dbuser, dbpasswd, loggerDir;
    int idleSleep;
    static Logger logger = Logger.getAnonymousLogger();
    Thread myThread = null;
    JumpQueueManager manager = null;
    private final static String VERSION = "2.92";
      public Jump(String jdbcURL, String user, String pwd, int idleSleep, String logDir) {
        dbURL = jdbcURL;
        dbuser = user;
        dbpasswd = pwd;
        this.idleSleep = idleSleep;
        manager = new JumpQueueManager(dbURL, dbuser, dbpasswd);
        loggerDir = logDir;
        //preparing logger
        prepareLogger();
      private void prepareLogger(){
        Handler hndl = new pl.com.sony.utils.SimpleLoggerHandler();
        try{
            String logFilePattern = loggerDir + java.io.File.separator + "jumplog%g.log";
            Handler filehndl = new java.util.logging.FileHandler(logFilePattern, JumpConstants.MAX_LOG_SIZE, JumpConstants.MAX_LOG_FILE_NUM);
            filehndl.setEncoding("UTF-8");
            filehndl.setLevel(Level.INFO);
            logger.addHandler(filehndl);
        catch(Exception e){
        logger.setLevel(Level.ALL);
        logger.setUseParentHandlers(false);
        logger.addHandler(hndl);
        logger.setLevel(Level.FINE);
        logger.info("LOGGING FACILITY IS READY !");
      private void processTask(QueueTask task){
        JumpProcessor proc = JumpProcessorGenerator.getProcessor(task);
        if(proc==null){
            logger.severe("Unknown task type: " + task.getType());
            return;
        proc.setJumpThread(myThread);
        proc.setLogger(logger);
        proc.setJumpRef(this);
        task.setProcStart(new java.util.Date());
        setExecution(task, true);
        new Thread(proc).start();
     private void processQueue(){
        //Endles loop for processing tasks from queue
        QueueTask task = null;
        while(true){
                try{
                    //null argument means: take first free, no matters which queue
                    do{
                        task = manager.getTask(activeQueues);
                        if(task!=null)
                            processTask(task);
                    while(task!=null);
                catch(Exception e){
                    logger.severe(e.getMessage());
            logger.fine("-------->Sleeping for " + idleSleep + " minutes...hzzzzzz (Active queues:"+ activeQueues.size()+")");
            try{
                if(!myThread.interrupted())
                    myThread.sleep(60*1000*idleSleep);
            catch(InterruptedException e){
                logger.fine("-------->Wakeing up !!!");
        }//while
    public void setMyThread(Thread t){
        myThread = t;
    /** This method is only used to start Jump as a separate thread this is
     *usefull to allow jump to access its own thread to sleep wait and synchronize
     *If you just start ProcessQueue from main method it is not possible to
     *use methods like Thread.sleep becouse object is not owner of current thread.
    public void run() {
        processQueue();
    /** This is just another facade to hide database access from another classes*/
    public void updateOraTaskStatus(QueueTask task, boolean success){
        try{
            manager.updateOraTaskStatus(task, success);
        catch(Exception e){
            logger.severe("Cannot update status of task table for task:" + task.getID() + "\nReason: " + e.getMessage());
    /** This is facade to JumpQueueManager method with same name to hide
     *existance of database and SQLExceptions from processor classes
     *Processor class calls this method to execute stored proc and it doesn't
     *take care about any SQL related issues including exceptions
    public void executeStoredProc(String proc) throws Exception{
        try{
            manager.executeStoredProc(proc);
        catch(Exception e){
            //logger.severe("Cannot execute stored procedure:"+ proc + "\nReason: " + e.getMessage());
            throw e;
     *This method is only to hide QueueManager object from access from JumpProcessors
     *It handles exceptions and datbase connecting/disconnecting and is called from
     *JumpProceesor thread.
    public void updateTaskStatus(int taskID, int status){
        try{
            manager.updateTaskStatus(taskID, status);
        catch(Exception e){
            logger.severe("Cannot update status of task: " + taskID + " to " + status + "\nReason: " + e.getMessage());
    public java.sql.Connection getDBConnection(){
        try{
            return manager.getNewConnection();
        catch(Exception e){
            logger.severe("Cannot acquire new database connection: " + e.getMessage());
            return null;
    protected synchronized void setExecution(QueueTask task, boolean active){
        if(active){
            activeQueues.put(new Integer(task.getQueueNum()), JumpConstants.TH_STAT_BUSY);
        else{
            activeQueues.remove(new Integer(task.getQueueNum()));
    public static void main(String[] args){
             try{
         System.out.println("The length-->"+args.length);
        System.out.println("It's " + new java.util.Date() + " now, have a good time.");
        if(args.length<5){
            System.out.println("More parameters needed:");
            System.out.println("1 - JDBC strign, 2 - DB User, 3 - DB Password, 4 - sleeping time (minutes), 5 - log file dir");
            return;
        Jump jump = new Jump(args[0], args[1], args[2], Integer.parseInt(args[3]), args[4]);
        Thread t1= new Thread(jump);
        jump.setMyThread(t1);
        t1.start();}
             catch(Exception e){
                  e.printStackTrace();
} The exception i am getting is
java.lang.NoClassDefFoundError: jdbc:oracle:thin:@localhost:1521:xe
Exception in thread "main" ERROR: JDWP Unable to get JNI 1.2 environment, jvm->GetEnv() return code = -2
JDWP exit error AGENT_ERROR_NO_JNI_ENV(183): [../../../src/share/back/util.c:820] Please help me.....
Thanks in advance.....sathya

I am not willing to wade through the code, but this portion makes me conjecture your using an Oracle connect string instead of a class name.
java.lang.NoClassDefFoundError: jdbc:oracle:thin:@localhost:1521:xe

Problem compiling a simple java file

Hi,
When I try to compile the following simple java file
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class HowdyServlet extends HttpServlet {
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws IOException, ServletException {
PrintWriter out = response.getWriter();
response.setContentType("text/html");
out.println("<html>");
out.println("<body>");
out.println("<center><h1>Hi</h1></center>");
out.println("</body>");
out.println("</html>");
at the command prompt as follows
C:\Shared\CBT\Java 2 JSP and Java Servlets\03\servlet1>javac -classpath
"C:\Program Files\Java\j2re1.4.2_03\lib\ext\QTJava.zip" *.java
Or
C:\Shared\CBT\Java 2 JSP and Java Servlets\03\servlet1>javac *.java
Or
C:\Shared\CBT\Java 2 JSP and Java Servlets\03\servlet1>javac HowdyServlet.java
I get the following errors and I cannot compile this java file -
HowdyServlet.java:2: package javax.servlet does not exist
import javax.servlet.*;
^
HowdyServlet.java:3: package javax.servlet.http does not exist
import javax.servlet.http.*;
^
HowdyServlet.java:5: cannot find symbol
symbol: class HttpServlet
public class HowdyServlet extends HttpServlet {
^
HowdyServlet.java:6: cannot find symbol
symbol : class HttpServletRequest
location: class HowdyServlet
public void doGet(HttpServletRequest request,
^
HowdyServlet.java:7: cannot find symbol
symbol : class HttpServletResponse
location: class HowdyServlet
HttpServletResponse response)
^
HowdyServlet.java:8: cannot find symbol
symbol : class ServletException
location: class HowdyServlet
throws IOException, ServletException {
^
6 errors
I have installed the latest JEE 5 SDK on Win XP Home. I have the following variable set as follows,
CLASSPATH = .;C:\Program Files\Java\j2re1.4.2_03\lib\ext\QTJava.zip
PATH = C:\Sun\AppServer\jdk\bin;%SystemRoot%\system32;%SystemRoot%;%SystemRoot%\System32\Wbem;C:\Program Files\Microsoft SQL Server\80\Tools\BINN;C:\Program Files\QuickTime\QTSystem;C:\Sun\AppServer\lib\ant\bin
ANT_HOME = C:\Sun\AppServer\lib\ant
I have spent hours scratching my head but don?t have a clue. I was wondering if you have any idea as why I might be getting these errors.
Thank you for your time.
Green

Hello, did you read the answers?
You have to put j2ee.jar or servlet-api.jar in your classpath. Those JAR files are included in the Java EE package somewhere. Remove the QTJava.zip junk from the classpath.
If you don't know what the classpath is and how to set it, read this:
Setting the class path
How Classes are Found
And I'll repeat what the others say: if you are very new to Java, then Java EE will probably be way over your head. First learn the language and the standard API. If you understand that well, start with Java EE. Or do you already know what servlets are, and that you need a servlet container to run them, and how to deploy them etc.?

Calling simple Java Code from 11g BPM

Hi,
I know this has been round the houses but I cant find a satisfactory solution for my scenario. I would like to call some simple java code from BPM (11.1.1.6). I guess I need to expose it as a service but it seems overkill to be via soap so any advice you can give would be much appreciated. Creating a jar that I can call somehow would be perfect.
This is my scenario:
- I am creating a Security POC for BPM
- The BPM Process is exposed as a web service and authenticated using SAML
- I am testing by calling the WS from OSB
- I want to be able to get the WLS Principal and display the username and the roles for the launching user, from within the BPM process
- This is possible using some simple weblogic client api code shown below
- So all I want to do is call this code from BPM somehow
- Anyone point me in the right direction ?
cheers
Tony
subject = Security.getCurrentSubject();
for(Principal p: subject.getPrincipals()) {
if(p instanceof WLSGroupImpl) {
groupList.add(p.getName());
} else if (p instanceof WLSUser) {
principal = p.getName();
}

The problem to communiate java classes and forms solved !
i have add my .jar file to $OA_JAVA/oracle/apps/fnd/jar and now i can communicate between forms and java.
I can create an object, i can get simple message from class, but when i try to create
ServiceFactory factory = ServiceFactory.newInstance();
ive got ORA-105100...
can anybody help ?

JDeveloper IDE simple setting problem

Hi,
Recently we switched to JDeveloper from Visual Cafe .I have a simple setting problem.How can I set the options so that IDE gives, the core java classes and packages,and our application classes and packeges, prompts in imports as well as in code.Where to set the options.
eg: when I write
import java. it should prompt all the pakages.
Thanks in advance.
-Gopal
null

I am not sure I understand what you are requesting, but ...
You can configure JDeveloper projects to include various libraries by default.
This is done by selecting menu Tools | Default Project Properties.../ Libraries tab.
You should define a library for your classes.
You can import any of the packages / classes from all the libraries which your project includes.
It would be incorrect for a tool to automatically add a bunch of import lines at the top of every file because each file should import what it needs and just as importantly, not import what it does not need depending on the component type (e.g. a servlet should not include javax.swing.* ).
An easy way to import elements into JDeveloper is to type in something like:
import java.
// and then type in Ctrl Space
and this launches the package browser, you can select packages or classes to import.
You can also do this at the variable declaratiton point such as typing in:
foo() {
Frame x
// Press Control Alt Space
and this will correctly change the type (Frame) to the type you select in the package browser and add the import statement.
-John
null

How to export crystal report into disk using simple java

hello
i m working in the reporting part my j2ee application
my requirement is that export this rpt file into pdf file and store into disk by writing simple java program
if any have code this then plz provide me
thanks & regards
ram

Uhm, these messages are not that related. One's a
JNDI problem, this one's just some vague "how do I
do" stuff.He wants to produce something in crystal reports and turn it into a PDF. So yes they are related. And yet another thread for this just sprung up.

Forte for JAVA: Problems with break points

Dear all,
I have the following problem:
When setting breaks point within the code of my web application (servlets and JSP) the debugger does not seem to be able to find them and to stop where I would it to :o(
When approching a portion of code that I know have a break point, I get the following message in the debugger window->
Connecting to localhost.localdomain:11555
Connection established
Breakpoint reached at line ? in class org.corproware.strutsrelated.listener.DBPoolListener by thread main.
Note the interrogation mark (?) instead of a valid line number.
It looks like I have the same poroblem with a simple java "HelloWorld"
Is their something I don't get or is it a known problem?
Many thanks!

Sorry mate, wrong forum. You shoud try Sun ONE Studio Forum isntead of this one. It is for UDS (Formerly known as Forte)

How to test the simple .java file in cactus

dear friends,
i have use the junit first time .And i am working in weblogic8.1 so i have use cactus .But i face the problem to use it.
1. how to test the simple .java file in cactus.
2.how to run the cactus in weblogic 8.1.

Hi,
It is because the converter works on byte code and it only supports a subset of the Java language (see the JC specifications). It is kind of like compiling you code on Java 6 and trying to run it on Java 5. The JCDK outlines the required compiler version.
Cheers,
Shane

Missing Defines Error in Simple Java Stored Procedure

Anyone have any suggestions on what might be causing the unusual behavior described below? Could it be a 10g java configuration issue? I am really stuck so I'm open to just about anything. Thanks in advance.
I am writing a java stored procedure and am getting some SQLException's when executing some basic JDBC code from within the database. I reproduced the problem by writing a very simple java stored procedure which I have included below. The code executes just fine when executed outside of the database (10g). Here is the output from that execution:
java.class.path=C:\Program Files\jEdit42\jedit.jar
java.class.version=48.0
java.home=C:\j2sdk1.4.2_04\jre
java.vendor=Sun Microsystems Inc.
java.version=1.4.2_04
os.arch=x86
os.name=Windows XP
os.version=5.1
In getConnection
Executing outside of the DB
Driver Name = Oracle JDBC driver
Driver Version = 10.1.0.2.0
column count=1
column name=TEST
column type=1
TEST
When I execute it on the database by calling the stored procedure I get:
java.class.path=
java.class.version=46.0
java.home=/space/oracle/javavm/
java.vendor=Oracle Corporation
java.version=1.4.1
os.arch=sparc
os.name=Solaris
os.version=5.8
In getConnection
We are executing inside the database
Driver Name = Oracle JDBC driver
Driver Version = 10.1.0.2.0
column count=1
column name='TEST'
column type=1
MEssage: Missing defines
Error Code: 17021
SQL State: null
java.sql.SQLException: Missing defines
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:158)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:206)
at oracle.jdbc.driver.OracleResultSetImpl.getString(Native Method)
at OracleJSPTest.test(OracleJSPTest:70)
Here is the Java code:
// JDBC classes
import java.sql.*;
import java.util.*;
//Oracle Extensions to JDBC
import oracle.jdbc.*;
import oracle.jdbc.driver.OracleDriver;
public class OracleJSPTest {
private static void printProperties(){
     System.out.println("java.class.path="+System.getProperty("java.class.path"));
     System.out.println("java.class.version="+System.getProperty("java.class.version"));
     System.out.println("java.home="+System.getProperty("java.home"));
     System.out.println("java.vendor="+System.getProperty("java.vendor"));
     System.out.println("java.version="+System.getProperty("java.version"));
     System.out.println("os.arch="+System.getProperty("os.arch"));
     System.out.println("os.name="+System.getProperty("os.name"));
     System.out.println("os.version="+System.getProperty("os.version"));
private static Connection getConnection() throws SQLException {
     System.out.println("In getConnection");
Connection connection = null;
// Get a Default Database Connection using Server Side JDBC Driver.
// Note : This class will be loaded on the Database Server and hence use a
// Server Side JDBC Driver to get default Connection to Database
if(System.getProperty("oracle.jserver.version") != null){
          System.out.println("We are executing inside the database");
          //connection = DriverManager.getConnection("jdbc:default:connection:");
          connection = new OracleDriver().defaultConnection();
}else{
     System.out.println("Executing outside of the DB");
     DriverManager.registerDriver(new oracle.jdbc.OracleDriver());
     connection = DriverManager.getConnection("jdbc:oracle:thin:@XXX.XXX.XXX.XX:XXXX:XXXX","username","password");
DatabaseMetaData dbmeta = connection.getMetaData();
System.out.println("Driver Name = "+ dbmeta.getDriverName());
System.out.println("Driver Version = "+ dbmeta.getDriverVersion());
return connection;
public static void main(String args[]){
     test();
public static void test() {
     printProperties();
Connection connection = null; // Database connection object
try {
     connection = getConnection();
     String sql = "select 'TEST' from dual";
     Statement stmt = connection.createStatement();
ResultSet rs = stmt.executeQuery(sql);
     ResultSetMetaData meta = rs.getMetaData();
     System.out.println("column count="+meta.getColumnCount());
     System.out.println("column name="+meta.getColumnName(1));
     System.out.println("column type="+meta.getColumnType(1));
     if(rs.next()){
          System.out.println(rs.getString(1));
} catch (SQLException ex) { // Trap SQL Errors
     System.out.println("MEssage: " + ex.getMessage());
     System.out.println("Error Code: " + ex.getErrorCode());
     System.out.println("SQL State: " + ex.getSQLState());
     ex.printStackTrace();
} finally {
try{
if (connection != null || !connection.isClosed())
connection.close(); // Close the database connection
} catch(SQLException ex){
ex.printStackTrace();
Message was edited by:
jason_mac

Jason,
Works for me on Oracle 10.1.0.3 running on Red Hat Enterprise Linux AS release 3 (Taroon).
Java code:
import java.sql.*;
* Oracle Java Virtual Machine (OJVM) test class.
public class OjvmTest {
public static void test() throws SQLException {
    Connection conn = DriverManager.getConnection("jdbc:default:connection:");
    PreparedStatement ps = null;
    ResultSet rs = null;
    try {
      ps = conn.prepareStatement("select 'TEST' from SYS.DUAL");
      rs = ps.executeQuery();
      if (rs.next()) {
        System.out.println(rs.getString(1));
    finally {
      if (rs != null) {
        try {
          rs.close();
        catch (SQLException sqlEx) {
          System.err.println("Error ignored. Failed to close result set.");
      if (ps != null) {
        try {
          ps.close();
        catch (SQLException sqlEx) {
          System.err.println("Error ignored. Failed to close statement.");
}And my PL/SQL wrapper:
create or replace procedure P_J_TEST as language java
name 'OjvmTest.test()';And here is how I execute it in a SQL*Plus session:
set serveroutput on
exec dbms_java.set_output(2000)
exec p_j_testGood Luck,
Avi.

Securing Web Services based on simple Java Classes

Hi @all!
We`ve got the following problem.
There`s a .NET client calling our Web services deployed on Bea Weblogic 8.1 (without
SP).
The Web Services are generated by the ANT task servicegen. They are based on simple
Java classes containing the service methods as public members.
Is there a possibility to secure these methods without using the console menu
item "Define Security Policy" ?
We can`t use this menu because it has got a javascript bug with methods returning
an array.
Thanks in advance for help.
Michael

Hi Michael,
Could you use transport level security, SSL [1]?
I'm not sure what limitation you are experiencing with the console? Is
there a traceback? Have you contacted customer support on this issue?
Thanks,
Bruce
[1]
http://edocs.bea.com/wls/docs81/webserv/security.html#1053203
Michael Albrecht wrote:
>
Hi @all!
We`ve got the following problem.
There`s a .NET client calling our Web services deployed on Bea Weblogic 8.1 (without
SP).
The Web Services are generated by the ANT task servicegen. They are based on simple
Java classes containing the service methods as public members.
Is there a possibility to secure these methods without using the console menu
item "Define Security Policy" ?
We can`t use this menu because it has got a javascript bug with methods returning
an array.
Thanks in advance for help.
Michael

How to call JCS in simple java class

I want to make a atsratup class and this class will have to communicate with a
java controls.But i am not able to create an instance of java control in simple
startup class.
IF any body has called java control in simple java class pls. let me know

Hi Surinder,
you can use (some types of) controls with the following code:
Class controlClass = Class.forName("mypackage.MyControl");
MyControl control = (MyControl)WlwProxy.create(controlClass, request);
control.callMethod();
Unfortunatelly it requires a request (or an URL), so you will need some
tricks to use it in a startup class.
This is an internal, undocumneted... call and does not set any
parameters of the control, so use it with care.
Let me know if you can solve your problem, pls
BR,
don
surinder wrote:
I want to make a startup class and this class will have to communicate with a java
controls.But i am not able to create an instance of java control in simple startup
class.
IF any body has called java control in simple java class pls. let me know
"surinder" <[email protected]> wrote:
I want to make a atsratup class and this class will have to communicate
with a
java controls.But i am not able to create an instance of java control
in simple
startup class.
IF any body has called java control in simple java class pls. let me
know

Simple java archive type deployment is invalid in Jdeveloper 9031

Hi All,
If I choose a Simple Java archive type of deployment of a jsp tag lib project in Jdeveloper the archive does not include the directory layout recursively. Ex. I get this.
c:\> jar tvf test.jar
64 Sat Jan 01 23:53:48 PST 2000 META-INF/MANIFEST.MF
1300 Sat Jan 01 23:53:48 PST 2000 META-INF/autodate.tld
5772 Sat Jan 01 23:53:48 PST 2000 test/autodate.class
Where if I do it the archiving from the comman line. i.e
c:\> jar cvf test.jar META-INF test
I get
0 Wed Feb 26 20:52:42 PST 2003 META-INF/
68 Wed Feb 26 20:52:42 PST 2003 META-INF/MANIFEST.MF
1300 Wed Feb 26 20:12:42 PST 2003 META-INF/autodate.tld
0 Wed Feb 26 20:12:42 PST 2003 test/
5772 Wed Feb 26 20:12:42 PST 2003 test/autodate.class
The latter is a valid archive that I can use for taglib deployment. The former, i.e the Jdev deployed archive does not work. The jsp does not find the tag library.
What is the archiving tool that jdeveloper uses??
Why is it different from doing a command line archive??
Is there anyway I can instruct the deployment tool to include the directory tree in the archive??
- Manish

Hi Lynn,
The Archive looks exactly the same and the jsp fails to find the tld from the classpath.
64 Fri Apr 04 13:53:48 PST 2000 META-INF/MANIFEST.MF
1300 Fri Apr 04 13:36:48 PST 2000 META-INF/autodate.tld
5772 Fri Apr 04 13:42:48 PST 2000 test/autodate.class
Note, this is a problem only when using the Tag lib autodiscovery mechanism of JSP 1.2 where the tld can exist anywhere in the classpath under META-INF and the path is not explicitly specified in the jsp.
- Manish
- Manish

Creating a simple java client for a session EJB local interface

Hi all
Is it possible to create a simple java client for a session ejb local interface with JDeveloper.
The problem is that it creates a test client for a remote interface only...
i.e.
MySessionEJB sessionEJB = context.lookup("MySessionEJB")
and once i try to adjust it manually for the local interface...
MySessionEJBLocal sessionEJB = (MySessionEJBLocal) context.lookup("MySessionEJBLocal") (MySessionEJBLocal - is the name of my local interface)
it generates the exception:
javax.naming.NotFoundException: SessionEJBLocal not found
at...........................(RMIClientContext.java:52)
There is still no problem with accessing the local interface object from the jsf project where i've added <ejb-local-ref> tag into the web.xml file.
but i need the possibility of testing the simple java client for the local interface to test business methods wich should return objects without indirect properties
Thanks in advance.
Alex.

Pedja thanks for reply.
I still dont understand what is wrong with my example.
The first peace of the code i wrote (getting the reference to the remote interface object) works pretty well, and even more it is produced automatically by JDeveloper, so why we cant get a reference to the local interface object the same way?
Certanly we should use the local interface for getting access to the resource functioning under the same local jvm and i think it doesnt metter wich app server we really use wls or oas or others
Thanks. Alex.

A simple Java program to be compiled with ojc and executed with java.exe

Hi ,
This thread is relevant to Oracle Java Compiler (file ojc) and jave.exe file.
I have written a simple java program which consists of two simple simple classes and using the JDev's 10.1.3.2 ojc and java files , i'm trying to execute it after the successful compilation....
The problem is that trying to run it... the error :
Exception in thread "main" java.lang.NoClassDefFoundError: EmployeeTest
appears.
How can i solve this problem...????
The program is as follows:
import java.util.*;
import corejava.*;
public class EmployeeTest
{ public static void main(String[] args)
   { Employee[] staff = new Employee[3];
      staff[0] = new Employee("Harry Hacker", 35000,
         new Day(1989,10,1));
      staff[1] = new Employee("Carl Cracker", 75000,
         new Day(1987,12,15));
      staff[2] = new Employee("Tony Tester", 38000,
         new Day(1990,3,15));
      int i;
      for (i = 0; i < 3; i++) staff.raiseSalary(5);
for (i = 0; i < 3; i++) staff[i].print();
class Employee
{ public Employee(String n, double s, Day d)
{ name = n;
salary = s;
hireDay = d;
public void print()
{ System.out.println(name + "...." + salary + "...."
+ hireYear());
public void raiseSalary(double byPercent)
{ salary *= 1 + byPercent / 100;
public int hireYear()
{ return hireDay.getYear();
private String name;
private double salary;
private Day hireDay;
For compilation... i use :
D:\ORACLE_UNZIPPED\JDeveloper_10.1.3.2\jdev\bin\ojc -classpath D:\E-Book\Java\Sun_Java_Book_I\Corejava EmployeeTest.java
For execution , i issue the command:
D:\ORACLE_UNZIPPED\JDeveloper_10.1.3.2\jdk\bin\java EmployeeTest
NOTE:I tried to use the jdk of Oracle database v.2 but the error :
Unable to initialize JVM appeared....
Thanks , a lot
Simon

Hi,
Thanks god....
I found a solution without using Jdev.....
C:\oracle_files\Java\Examples>SET CLASSPATH=.;D:\E-Book\Java\Sun_Java_Book_I\Corejava
C:\oracle_files\Java\Examples>D:\ORACLE_UNZIPPED\JDeveloper_10.1.3.2\jdk\bin\javac EmployeeTest.java
C:\oracle_files\Java\Examples>D:\ORACLE_UNZIPPED\JDeveloper_10.1.3.2\jdk\bin\java EmployeeTest
What does Ant has to do with this?Sorry, under the Ant tree a classpath label is found....I'm very new to Java and JDev...
You need to include the jar file that has the Day method in it inside project properties->libraries.I have not .jar file.. just some .java files under the corejava directory.... By the way , I have inserted the corejava directory to the project pressing the button Add Jar/Directory.... , but the problem insists..
Thanks , a lot
Simon

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