Simple Java DB example
I am using Java 1.6 and Eclipse Galelio on Vista, Do I need to configure anything is there any story of setting path?
How to check my Java DB is working or not or everything is fine or not?
I found many totorial with simple Java DB example but they seem dealing with previous version of JDK, I guess SUN too on http://java.sun.com/developer/technicalArticles/J2SE/Desktop/javadb/ , kindly provide me the simplest example which uses Java DB.
I am not able to figure out the whole thing of JAVA DB , how it works, in plain language I want to know is there any way of interacting with database from Command prompt? If so how?
When I am running a simpleApp.java
I am getting this error:
Unable to load the JDBC driver org.apache.derby.jdbc.EmbeddedDriver
Please check your CLASSPATH.
java.lang.ClassNotFoundException: org.apache.derby.jdbc.EmbeddedDriver
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at SimpleApp.loadDriver(SimpleApp.java:414)
at SimpleApp.go(SimpleApp.java:125)
at SimpleApp.main(SimpleApp.java:93)
----- SQLException -----
SQL State: 08001
Error Code: 0
Message: No suitable driver found for jdbc:derby:derbyDB;create=true
SimpleApp starting in embedded mode
SimpleApp finished
Similar Messages
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Where can I find a simple examplecode in Java 3D?
Like drawing a simple object like a cube.
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Simple Java Example for DI API
Hello,
I have a Java Application and would like to connect to a SAP BO Database using JCO and DI API.
I want a simple java example that just connects to the BO Database and returns an item name or value or a recordset from the database.
Since i dont have the names of what kind of fields, items , tables exist in the SAP BO Demo database i need a basic example to make sure that i can connect to the database and retrieve data from the DB.
Any help in this regard would be appreciated...
AmitDear Amit Hingher,
The B1 JCO is a java wrapper for DI API so basically you could refer to DI help for all objects, methods and properties.
Here the jave sample for connection function:
package test;
import com.sap.smb.sbo.api.*;
public class ConnectSAP {
// company interface
public ICompany company;
private SBOErrorMessage errMsg = null;
public static void main(String[] args) {
ConnectSAP company = new ConnectSAP();
company.conn();
//method make connection andinitialize company instance
public int conn() {
int rc = 0;
try {
company = SBOCOMUtil.newCompany();
company.setServer("(local)");
company.setCompanyDB("test");
company.setUserName("manager");
company.setPassword("manager");
company.setDbServerType(...);
company.setUseTrusted(new Boolean(false));
company.setLanguage(SBOCOMConstants.BoSuppLangs_ln_English);
company.setDbUserName("Sa");
company.setDbPassword("123");
company.setAddonIdentifier("...");
company.setLicenseServer("...");
rc = company.connect();
if (rc == 0) {
System.out.println("Connected!");
} else {
errMsg = company.getLastError();
System.out.println(
"I cannot connect to database server: "
+ errMsg.getErrorMessage()
+ " "
+ errMsg.getErrorCode());
} catch (Exception e) {
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return -1;
return rc;
public void freeConnection(){
company.disconnect();
Best Regards
Jane Jing
SAP Business One Forums team -
Re: Using simple java class in an .war file.
Hi All,
I have a simple question,
Can I access an simple java class from a jsp file that I have written by putting it in the "classes" folder?? What entry should go in the web.xml file?
Here is my directory structure:
sample.war
|
----test.jsp <file>
|
----WEB-INF <folder>
| |
| ----classes<folder>
| | |
| | ----simpleJavaClass.class<file>
| |
| ----lib<folder>
| |
| ----web.xml
I want to access the simpleJavaClass.class from the jsp test.jsp.
Please suggest.
Thanks and regards
AyusmanIt is possible to access the class in u r classes folder from u r jsp file.
For example
<%@ page import="com.test.service.PricingSolution,
com.test.core.PhoneNumber
%>
<% PricingSolution solution = (PricingSolution)session.getAttribute("solution"); %>
This is a simple scriplet example. You do the same using jstl tags also.
--Shinoy -
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. -
Simple XML DOM Example Needed.
I need a simple XML DOM Example that reads in the XML and makes objects out of the elements. The tutorial from sun is very sketchy and seems to good far too quickly.
Thanks,
Dave.You can find some examples:
http://java.sun.com/xml/jaxp/dist/1.0.1/examples/#building
http://newinstance.com/writing/javaxml2/javaxml2_examples.html
http://www.docuverse.com/domsdk/index.html#tutorial
http://www.devx.com/sourcebank/search.asp -
Simple Java created with compilation errors.
Hi,
While I am using Oracle for many years (currently 9.2.0.6.0) I am completely new to Java in the database.
I found a very simple example to get started (please see SQL*Plus dump below) ... but I get a compilation error. Can anyone tell what I am doing wrong?
SQL> CREATE OR REPLACE AND COMPILE JAVA SOURCE NAMED Fibonacci AS
2 public class Fibonacci
3 {
4 public static int fib (int n)
5 {
6 if (n == 1 || n == 2)
7 return 1;
8 else
9 return fib(n - 1) + fib(n - 2);
10 }
11 }
12 /
Warning: Java created with compilation errors.
SQL> show errors java source Fibonacci
No errors.
SQL>
(It must be a simple thing, the example I found seems correct, but what about grants, settings etc.)
Thanks in advance,
StefanStefan,
I cannot see anything in your code that would cause a compilation error. However, according to the example in the "Oracle 9i SQL Reference", it looks like you need to enclose the name in double quotes, as in:
CREATE OR REPLACE AND COMPILE JAVA SOURCE NAMED "Fibonacci" AS ...Alternatively (and this is the way I do it), you could compile the class outside of the database, and load the compiled class file. Just create a file called "Fibonacci.java" (that contains your java code), compile it, and then use the "loadjava" tool to load the "Fibonacci.class" file into the database. Please refer to the Oracle 9i Java Developer's Guide for more details.
Good Luck,
Avi. -
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
SimonHi,
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 -
Can we run the batch file using simple java application
Hello sir,
we want to run the batch file using simple java application. i tried with some example, we run the exe files but not batch file.
Runtime r = Runtime.getRuntime();
r.exec("D:\\jboss\\bin\\run.bat");
My application is server will run when we run the java appliation.
any suggestion? plz give me the solutionsyes you can run html file
WEB.SHOW_DOCUMENT is a built-in that is used in Forms to call URL from a Web Form. It works much like the similar way that a link on an HTML page works and it takes two arguments, one is URL and second one is TARGET, in your case use following.
WEB.SHOW_DOCUMENT('http://channas.iil.informatics.lk:8890/forms/frmservlet?config=abc.html', '_blank');
Hope this will work for you
Abbas -
How to pass a HTTP request from a simple java class
Is it possible to pass an HTTP request from a simple java class.if yes how?
Is it possible to pass an HTTP request from a simple
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How do I call a simple java class from a bpel process?
Hi.
In JDeveloper 10.1.4.3.0 I've created a simple java class that does an ftp get operation followed by an unzip. The class uses some 3rd part libraries (jars).
I want to use a simple bpel process to schedule a daily execution of this java class, and deploy it all to our SOA-server, - and was looking into using the <bpelx:exec> function.
The java class and the bpel process is all stored in the same JDeveloper project.
How do I put this together so that both my java class and the necessary jars are available to the bpel process?
I've looked into the JavaExecSample.bpel, and it's says something about "...the class com.otn.samples.javaexec.CreditCalculator is locally packaged with this BPEL process".
How do I do that?
Can I make it and test it all locally from my workstation (only JDeveloper installed, I guess there's nothing that can execute the bpel code?), or do I have to compile class etc (make war-file?) and deploy to SOA server (BPEL-INF/lib or classes?) before anything can be tested?
(I guess all this is simple, once you know how, but being a newbie to this I need a shove in the right direction :-)
Regards,
-Haakon-To create a java class and dependent jars inside the BPEL process project you need to do the following:
1. Right click on your BPEL process project and select New and then Java Class from the Items.
2. Make the BPEL process project, JDeveloper would compile the java classes and add them into the BPEL suite case jar, see the output folder and check the BPEL suite case jar file for java classes and dependent jars.
You can test your Java classes from JDeveloper IDE, no need to deploy the classes on SOA server. When you make the BPEL project it compiles .bpel files and Java classes. You can test your classes once .bpel file and java classes compiled successfully.
Regards,
Dharmendra
http://soa-howto.blogspot.com -
Efficiency Question: Simple Java DC vs Used WD Component
Hello guys,
The scenario is - I want to call a function that returns a FileInputStream object so I can process it on my WD view. I can think of two approaches - one is to simply write a simple Java DC that does so and just use it as a used DC so I can call the functionality from there. Or create another WD DC that exposes the value (as binary) via component interface.
I'm leaning on the simple Java DC approach - its easier to create. But I'm just curious on what would be the Pro-side (if there's any) if I use the WD Component interface approach? Is there a plus for the efficiency? (Though I doubt) Or is it just a 'best/recommended practice' approach?
Thanks!
Regards,
JanHi Jan
>one is to simply write a simple Java DC that does so and just use it as a used DC so I can call the functionality from there
Implemented Java API for the purpose mentioned in your question is the right way, I think. The Java API can be even located in the same WebDynpro DC as your WebDynpro components. There is not strongly necessity to put it into separate Java DC.
>Or create another WD DC that exposes the value (as binary) via component interface
You should not do this because in general WD components' purpose is UI, not API. Implementing WD component without any UI, but with some component interface has very-very restricted use cases. Such WD component shall only be a choice in the cases when the API is WebDynpro based and if you have to strongly use WebDynpro Runtime API in order to implement your own API.
If your API does not require WebDynpro Runtime API invocations or anything else related to WebDynpro then your choice is simple Java API.
>But I'm just curious on what would be the Pro-side (if there's any) if I use the WD Component interface approach? Is there a plus for the efficiency?
No. Performance will be better in simple Java API then in WebDynpro component interface. The reason is the API will not pass thought heavy WebDynpro engine.
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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.....sathyaI 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 -
What's wrong with this simple java file
I am learning java input methods. When I tried to compile the below simple java file, there were two errors.
import java.io.*;
public class MainClass {
public static void main(String[] args) {
Console console = System.console();
String user = console.readLine("user: ");
System.out.println(user);
}The compiler errors:
h:\java\MainClass.java:5: cannot resolve symbol
symbol : class Console
location: class MainClass
Console console = System.console();
^
h:\java\MainClass.java:5: cannot resolve symbol
symbol : method console ()
location: class java.lang.System
Console console = System.console();
^
2 errors
Could anyone take a look and shed some lights on this?I have changed to "import java.io.Console;" but this below errors:
h:\java\MainClass.java:1: cannot resolve symbol
symbol : class Console
location: package io
import java.io.Console;
^
h:\java\MainClass.java:5: cannot resolve symbol
symbol : class Console
location: class MainClass
Console console = System.console();
^
h:\java\MainClass.java:5: cannot resolve symbol
symbol : method console ()
location: class java.lang.System
Console console = System.console();
^
3 errors
----------- -
How to Deploy a Simple Java Web service in Oracle E Business Suite Server
Hi,
I have created a simple Java webservice using Jdev11g.
I am able to Test the Webservice using Jdev11g itself.
How Can i migrate the same to Oracle E Busienss Suite( - 9iAS ) so that webservice clients connect to 9iAS instead of my local machine
Thanks,
Gowtam.Hi Sudhakar,
If you are used to working with ant then you can very well use eclipse to deploy your web service.
You would usually have the ant script in the source root working directory. From eclipse if you select the build file from the navigator view and right click you will see a run ant option in the pop up menu.
Select that option and you would be able to see each targets with a checkbox select option. So define each target maybe one for wsdl2java conversion, one for compilation and one for deploying your web services. You can either make all of them run by having depends option on or you can run them individually as it takes your fancy.
I am not sure about debugging a web service yet.
Hope this helps
Aviroop
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