Oracle Driver In Java App?

Jul 26, 2014

Where do I have to put the ojdbc6.jar file so that Java finally recognizes it?I'm trying to connect to a Oracle XE databse from a Java application, but

Class.forName("oracle.jdbc.OracleDriver");

Will throw a ClassNotFoundException no matter where I put the driver. Stuff like this should be extremely simple but I am about to give up for good now.

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How To Access Oracle DB Without Using ODBC Driver Jar File

Oct 15, 2014

I need to access Oracle database without using ODBC driver using DAO only, how to do that...

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JDBC :: Oracle Driver Hangs When Fetching Row

Nov 7, 2014

We have a java application in our production enviroment using Spring framework which is configured with DBCP connection pool and the backend is Oracle database( version 11.2.0.3). Recently we encountered an occasionally happened situation(about once every week) and can be described as below:
 
The application schedules a task that runs every 10 minutes. And during task execution, the application would issue a SQL query of which the result is expected to be got within 10 seconds. At 11:51 a.m Oct 13th, however, the application failed to get the result within expected time, and 2 hours later, at 13:51, the result was finally returned to application.  Due to lack of information at that time, we were not able to reproduce the same problem in test environment. At 15:31 p.m, Oct 29th, it happend again and this time we grasped all the information including thread dump and Oracle diagnostic information. We could found that:

1. Through oracle v$sql view, we could find that the SQL query is executed twice, at 15:31 and 17:31 respectively.

2. By analyzing TCP packets provided by network monitoring tools, it can be concluded that the request TCP packet containing SQL statement had been sent to Oracle and get executed, but after that JDBC only fetched first 80000 records  out of 90000 records in total and then it stopped, didn't send any more request to Oracle to fetch rows. 2 hours later, Oracle sent a TCP keep alive packet and JDBC driver resume fetching remaining rows using the same connection(which can be confirmed by comparing source port of packets).

3. We dumped the thread at which JDBC hangs at socket read of JDBC driver
 
By the way, the version of JDBC we use is 11.2.0.1 and JDK version is 1.5.0_22.

The SQL statement is very simple:

select sum(n.netvalue) npvi,
       n.HISCENEID hsid,
       n.counterpartyid cid,
       n.productid pid,
       n.opendays

[Code] .....

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JDBC :: No Suitable Driver Found For Oracle Database Connection

Jul 10, 2015

I have small Java code, which execute every day and checks for data in database using Cronj Schedular and everything works fine, but recently I have observed that, it is failing due to
  
    java.sql.SQLException: No suitable driver found for jdbc:oracle:thin:@160.110.xx.xxx:1521/test
 
At the same time, when I run my test code to check Database connectivity that works fine without above exception. I'm unable to figure it out. Although, there was just slight code change, but that was nowhere related to Database or Database connection.  
 
dbconf.java
    public class dbconf {
    private Connection connect;
    private String connstr;
    public Connection getConnection() throws SQLException {
    connstr = "jdbc:oracle:thin:@160.110.xx.xxx:1521/test";

[Code] .... 
 
Application Log file
 
    Wed Jul 01 09:25:17 IST 2015:------- Initializing -------------------
    Wed Jul 01 09:25:17 IST 2015:------- Scheduling Jobs ----------------
    Wed Jul 01 09:25:17 IST 2015:------- Job Started Running ----------------
    Thu Jul 02 06:00:00 IST 2015 : Job Executed..!! Bschedularv2.2
    java.sql.SQLException: No suitable driver found for jdbc:oracle:thin:@160.xxx.67.xxx:1521/test
    Sat Jul 04 06:00:00 IST 2015 : Job Executed..!! Bschedularv2.2
    Sun Jul 05 06:00:00 IST 2015 : Job Executed..!! Bschedularv2.2
    java.sql.SQLException: No suitable driver found for jdbc:oracle:thin:@160.xxx.67.xxx:1521/test
 
So, you can see, It failed on 3rd of July and 5th July as well. But, in between it ran fine.

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JDBC :: Pooling Oracle Driver Socket Read Timed Out

Dec 18, 2014

I run Java EE application on Glassfish server v3 together with Oracle 12 DB on the same machine under Windows Server 2012 64bit. I use latest ojdbc7 driver.
 
Connection pool config:
 
<jdbc-connection-pool validation-table-name="DUAL" steady-pool-size="20" statement-cache-size="100" associate-with-thread="true" statement-timeout-in-seconds="30" idle-timeout-in-seconds="60" max-wait-time-in-millis="2000" validate-atmost-once-period-in-seconds="20" datasource-classname="oracle.jdbc.pool.OracleDataSource" pool-resize-quantity="5" max-pool-size="60" res-type="javax.sql.DataSource" name="dbPool" is-connection-validation-required="true">
  <property name="driverClass" value="oracle.jdbc.OracleDriver"></property>
  <property name="user" value="xxx"></property>

[Code] ....

After 2 or 3 hours, when there is more than 1 user (3-5) using my application, it stops responding and I get this in glassfish logs
 
javax.enterprise.resource.resourceadapter.com.sun.enterprise.resource.allocator|_ThreadID=152;_ThreadName=Thread-2;|RAR5038:Unexpected exception while creating resource for pool dbPool. Exception : javax.resource.spi.ResourceAllocationException: Connection could not be allocated because: IO Error: Socket read timed out

[Code] ....

From the database side it looks like this
 
Fatal NI connect error 12560, connecting to:
  (LOCAL=NO) 
  VERSION INFORMATION:
  TNS for 64-bit Windows: Version 12.1.0.1.0 - Production
  Oracle Bequeath NT Protocol Adapter for 64-bit Windows: Version 12.1.0.1.0 - Production

[Code] ....

When I just reset db listener everything works ok for next 1-2 hours (depends on application load). So temporary solution is to run bat script from windows scheduler to reset the listener every 1h. I tried everything I could find - applied these parameters:
 
  - Sqlnet.ora:
  SQLNET.INBOUND_CONNECT_TIMEOUT=180
  SQLNET.EXPIRE_TIME=5
  - Listener.ora:
  INBOUND_CONNECT_TIMEOUT_LISTENER_IPC=120
 
But still without success

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JDBC :: Java Oracle Rac Connection URL Using Scan

Dec 30, 2014

I am trying to connect to an oracle rac using jdbc thin . when i use the scan as the host, like this

String url = "jdbc:oracle:thin:@//<scan>:port/servicename;

I get error 1153, connection refused

but when i use the ip of the rac instead of the scan

String url = "jdbc:oracle:thin:@//<ip>:port/servicename;

The connection is successful
 
Is the issue at the application level? or is the problem with the server ....

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Sep 18, 2014

I used the PLPDF software to generate a blob in PDF format in PL/SQL. I can open it in a browser but I would rather send it directly to a printer from PL/SQL.
 
I know I can use tools like BI and Jasper but I want this particular solution to be 100% database solution.
 
I was wondering of I can use JAVA in Oracle to send the blob to a printer.

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Dec 1, 2014

I've Installed oracle JDK version 1.8 on a debian machine that already has openjdk 1.6.i've set the path variable in etc/login.defs and java_home variable In etc/environment. When I echo $JAVA_HOME it points to the oracle version correctly and when I run javac It uses the oracle 1.8 version. The problem is when I run the java command , It runs the openjdk 1.6 version and I'm not sure why.If I type java -version It shows the openjdk version.

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How To Save Output Of Java Program In Oracle Database

Sep 30, 2014

I have written java program which can extract online data from url and i want to store it in data base in new token row in table so than i can use in my application . how could it be done using type4 drive ..

These are my code ...

import javax.swing.text.html.parser.*;
import javax.swing.text.html.*;
import javax.swing.text.*;
import java.io.*;
import java.util.StringTokenizer;
import java.net.*;
public class ParseTest extends HTMLEditorKit.ParserCallback {

[Code] ......

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Feb 10, 2014

I am running a page that launches a Java Webstart app and a Java Applet. I don't have problem launching this page in Firefox, but I have to run it in IE11. The thing is IE11 keep redirecting me to oracle java download site. I have install Java RE like 3 times from IE already. What am I missing?

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Oct 27, 2014

I want to create an application wich can handle xml files ( display xml files's data on a html page) + insert those data into an oracle database.

I'm new to that, it a project for my internship. wich API is the most appropriate for that ( Jdom or Xstream or other), wich framework i can use ( there is only 3 IHM : connexion, upload file, display data, confirmation insertion data)?

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Jan 31, 2013

I'm creating a web applicaion. for that i want to create a registration page. and this registration details have to be stored in the database.

I'm getting the below error while trying to send the data ...

The requested resource (/cmd/InsertRegtodb) is not available.

Here cmd is project name and InsertRegtodb is servlet name.

Actually the servlet is present is the mentioned address. but it is not connecting to it

There is one more servlet in the same folder and which is accessible from another jsp. But this servlet is not accessible even though i have used same code as it is used for the servlet which worked for me previously...

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Jun 21, 2013

Can we write java class or code inside Oracle Stored procedure.

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Java Servlet :: HTTP Status 404 Error - Program Does Not Connected To Oracle DB?

Oct 16, 2012

I am working wit netbean 7.2 ide,oracle 10g. the servlet program does not connected to the oracle db. i always recieve a

HTTP Status 404 -

type Status report

message

descriptionThe requested resource () is not available.

Oracle GlassFish Server 3.1.2.2

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Create A Driver Class

May 2, 2014

Why we create a driver class?Instead of creating a driver class, if we want to compile our code so will it show output? Let say, we've created a class GradeBook of the institution for students.So they can easily view their profile information and scores in different semesters.so when we have created a class for this purpose, should we create a driver class or not?What is the big advantage of creating a driver class?

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Sep 25, 2014

I'm trying to use a setter method to pick a random integer to be the MPG for a car. However, I'm having major issues in my driver when trying to use that random number in an instance. I'm not finished with the driver yet because I keep getting "cannot find symbol errors"

import java.util.Random;
public class Car {
private String make;
private String model;
private int year;
private int mpg;
private int odometer;
Random generator = new Random();

[code]...

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Feb 20, 2014

I am having trouble creating a driver for the following program. im new to creating interfaces and i need to make this work.

Lockable interface:

Java Code:

public interface Lockable {
boolean locked();
public void setKey(int key);
public void lock(int key);
public void unlock(int key);
} mh_sh_highlight_all('java');

[code]....

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Feb 25, 2014

I want to write java code which can block unbuffered I/O requests send to CD driver ...

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No Suitable Driver Found For Dbms

Mar 22, 2015

I started learning mysql to connect my program to a database but every time i try to connect I get this error.

java.sql.SQLException: No suitable driver found for dbms:mysql://localhost:3306/apexdemo
at java.sql.DriverManager.getConnection(DriverManager.java:596)
at java.sql.DriverManager.getConnection(DriverManager.java:215)
at JDBCdemo2.main(JDBCdemo2.java:7)

I did the following:

- added the mysql-connector-java-5.1.34 jar to my classpath
- added mysql jdbc driver to the project library
- double checked the url syntax and spelling errors
- checked that the server is running

import java.sql.*;
public class JDBCdemo2 {
public static void main(String[] args) {
Connection conn = null;

[Code] ....

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Accessing Private From Driver Class

May 14, 2015

I came across the below

1) When a variables are declared "Private" How should it be accessed from the driver class ? Sometimes i get an error in driver class saying "your variable is declared Private" why am I getting this error ...

The document says "Private" declared variables should be accessed only through methods. What does that mean.

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Test Driver Does Not Accept String Parameter

Jan 6, 2015

I wrote a couple classes and am trying a test driver but it is having an error I do not know how to solve.

Student Class:

public class Student{
private Course[] courseList;
private static int numCourses;
private final int maxCourses;
public Student(int max){
maxCourses = max;

[Code] .....

Error:
javac tester.java
tester.java:6: error: cannot find symbol
one = new Course(name);
^
symbol: variable name
location: class tester
1 error

Same issue, just only one error as there is only one line. It seems like it does not accept my parameters as it cannot find symbol.

I forgot to put the "" in the brackets, it's been a month since I have looked at any java and made this simple mistake.

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May 10, 2014

public class Car
{
//instance variables ----------------------
private String make;
private String model;
private int year;
private double vehiclePrice;
private double downPayment;
private double milesPerGallon;

[code]....

I created this class "Car" (also not sure if it's correct) and need to write a driver program that creates two instances of the class Car. One must use the default constructor, and the other must use the non-default constructor. It must demonstrate the methods used in the Car class using those instances.

public class DriverCar
{
public static void main(String[] args) {
Car car1 = new Car("Toyota", "Corolla", 2013, 20000, 3000, 35);
Car car2 = new Car("Ford", "Taurus", 2005, 14000, 1500, 25);
System.out.println(car1);

[Code] ....

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How To Create A Driver Program That Invokes A Class

May 13, 2014

Assignment:

Create a class; call it Lab4a that will have one method called pull. This method does not return anything and requires no parameters.

-In the method, create three random integers in the range 1 to 7. The method will then display the three numbers to the terminal window.

-Now create a driver program, called SlotMachine, to invoke the pull method of the Lab4a class.

-As a refresher, you will have a main method in the driver class that will create an object of Lab4a and then use the only method of this object.

-In your driver program, invoke the roll method 10 times.

-See the back of this lab for an example of the output.

This is what I have so far.

Slot machine

import java.util.Random;
public class Lab4a {
public static void main (String[]args) {
Random pull=new Random();

[code]....

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Creating Instance Methods And Driver Class

May 5, 2014

Okay, so I have to create a class with instance data and instance methods.

First, BankAccount class. It should contain the following information, stored in instance variables:

First name: The customer's first name.
Last name: The customer's last name
Balance: The amount of money the customer has in the account.

It should have the following methods:

BankAccount(String firstName, String lastName,
double openingBalance)

This constructor creates a new BankAccount

public String firstName()
Returns the customer's first name
public String lastName()
Returns the customer's last name
public double balance()
Returns the customer's account balance

Finally I need to create a driver to test my class. And create several accounts and verify that the first name, last name, and balance methods work properly. This is my code below.. I don't know if I did it right.

public class BankAccount {
String firstName, lastName;
double balance;
public BankAccount(String firstName, String lastName, double balance) {

[Code] .....

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Jan 15, 2015

I'm working on an application I made a few years ago. At that time I connected to a local database so my address was 'jdbc:mysql://localhost:3306/'. That database is long gone so I recreated it on one of my hosted servers but I'm a little unsure of how to connect to it. At the moment I'm trying "jdbc:mysql://www.mydomain.com:3306/" but it is giving me an access denied error.

java.sql.SQLException: Access denied for user 'myusername'@'c-[my-ip].hsd1.pa.comcast.net' (using password: YES)Every result on Google seems to use localhost so I'm having a little difficulty figuring out the correct format.

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Apr 13, 2015

I am to create a Array class then create a Driver class (TestArray) to test all the methods in the Array Class. Here's the code i've written for the Array Class. I just nee developing the TestArray class.

import java.util.Scanner;
public class Array
{
Scanner sc = new Scanner(System.in);
private double[] array = new double[];
public void setArray(double[] arr) {

[Code] ...

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