Java.io and sun.io
What is difference between "java.io" and "sun.io",
I can not find the "sun.io" in Java2 API and
where can find it.
The java.* packages are the only packages that are considered "part" of Java. Any extra classes that may be bundled with a release should be considered supplementary and transient - if you look at their documentation, you will likely find warnings that the details of these classes may not be consistent in future releases, nor may the classes even exist.
The difference is that java.io is the stable one that you should be using... The implementation may be using sun.io behind the scenes, but if you use java.io, then if the implementation changes (As it appears to), you don't care.
If you can't find it, there's a good chance you aren't supposed to.
The exception to above is the javax.* package... these represent java extensions, and are also considered standard.
-Troy
PS- Yes, the changing sun.* class/package structure is extremely bad policy, not to be emulated... once an API is released, it is considered 'polite' to leave it backwards-compatible, or at least offer upgrade advice.
Similar Messages
-
Debuging with Sun java AS and eclipse
hi,
i'm using eclipse 3.4 and sun java as 8.2 as application server.
when i used first tomcat and in my code i put system.out.println("...") the console showed the result, now using sun as i can not see anything ?
what to do to print in the console (without running in debug mode if possible).I found an acceptable work-around for this issue of not being able to specify Sun Java as the default JRE for browsers in our environment.
I replaced our APPLET tags with OBJECT tags in our HTML code. This allowed me to specify a Java version using a classid value, like so:
Original APPLET tag:
<applet name="SPCchart" code="iSPCChart" codebase="/XMII/Classes" archive="illum8.zip" mayscript>
<param name="QueryTemplate" value="Metrics_ING/ING_010Query">
<param name="DisplayTemplate" value="Metrics_ING/ING_010SPCChart">
</applet>
New OBJECT tag:
<object name="SPCChart" classid="clsid:CAFEEFAC-0016-0000-FFFF-ABCDEFFEDCBA" mayscript>
<PARAM name="code" value="iSPCChart">
<PARAM name="codebase" value="/XMII/Classes">
<PARAM name="archive" value="illum8.zip">
<param name="QueryTemplate" value="Metrics_ING/ING_010Query">
<param name="DisplayTemplate" value="Metrics_ING/ING_010SPCChart">
</object>
The specific classid specifies any Java version in the 1.6.0 family. (We're using 1.6.0_05)
We're not yet in production so we're not talking about having to update thousands of APPLET tags.
Does anyone see any problem to this approach - switching APPLET tags to OBJECT tags and specifying the appropriate Java CLASSID?
David -
Desktop Integration Portlet and Sun Java Runtime problem
Hi,
The DIP works just fine in our test portal (10.1.4) if users have the Sun Java installed and enabled. The problem is that we have another application in our company that requires that Sun Java NOT be enabled. Does anyone know of a workaround, or a way to modify the portlet to get around this issue?
Thanks.Well, the DIP internally uses a java applet which will then scan the preferred folder. I know that this is a little too late for an answer, I was just searching on DIP when I saw this post.
-Harsha -
Looking for Performance Comparisons Between JRockit 6 and Sun Java SE 6
Hello,
Can someone point me to some performance comparisons (benchmarks, etc.) between the JRockit and Sun JVMs?
Thanks in advance.Hi Ben.
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Problem with java look and feel
Hi! This is my first time posting here. Do apologize me if I am not familiar with the regulations here. Thanks!
Currently, I am developing a project using NetBeans IDE. It is using RMI, and some basic UI. I am facing the following error when I tried applying the java look and feel code. Please see below for the code used and the error message.
try { UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
} catch (Exception e) { }
Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: javax.swing.plaf.ColorUIResource cannot be cast to java.util.List
at javax.swing.plaf.metal.MetalUtils.drawGradient(MetalUtils.java:196)
at javax.swing.plaf.metal.MetalInternalFrameTitlePane.paintComponent(MetalInternalFrameTitlePane.java:384)
at javax.swing.JComponent.paint(JComponent.java:1027)
at javax.swing.JComponent.paintChildren(JComponent.java:864)
at javax.swing.JComponent.paint(JComponent.java:1036)
at javax.swing.JComponent.paintChildren(JComponent.java:864)
at javax.swing.JComponent.paint(JComponent.java:1036)
at javax.swing.JLayeredPane.paint(JLayeredPane.java:564)
at javax.swing.JComponent.paintChildren(JComponent.java:864)
at javax.swing.JComponent.paint(JComponent.java:1036)
at javax.swing.JComponent.paintChildren(JComponent.java:864)
at javax.swing.JComponent.paint(JComponent.java:1036)
at javax.swing.JLayeredPane.paint(JLayeredPane.java:564)
at javax.swing.JComponent.paintChildren(JComponent.java:864)
at javax.swing.JComponent.paintToOffscreen(JComponent.java:5129)
at javax.swing.BufferStrategyPaintManager.paint(BufferStrategyPaintManager.java:285)
at javax.swing.RepaintManager.paint(RepaintManager.java:1128)
at javax.swing.JComponent.paint(JComponent.java:1013)
at java.awt.GraphicsCallback$PaintCallback.run(GraphicsCallback.java:21)
at sun.awt.SunGraphicsCallback.runOneComponent(SunGraphicsCallback.java:60)
at sun.awt.SunGraphicsCallback.runComponents(SunGraphicsCallback.java:97)
at java.awt.Container.paint(Container.java:1797)
at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:734)
at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:679)
at javax.swing.RepaintManager.seqPaintDirtyRegions(RepaintManager.java:659)
at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(SystemEventQueueUtilities.java:128)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)
Java Result: 1Thanks for everyone's help!
Below is the executable code generated using NetBeans which is enough to generate the error message. Sometimes you can get the error message just by running the program. Sometimes the error will occur when you go into the Menu and click on Item.
* NewJFrame.java
* Created on January 8, 2008, 1:11 PM
package client;
import javax.swing.UIManager;
* @author Yang
public class NewJFrame extends javax.swing.JFrame {
/** Creates new form NewJFrame */
public NewJFrame() {
initComponents();
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
// <editor-fold defaultstate="collapsed" desc=" Generated Code ">
private void initComponents() {
jDesktopPane1 = new javax.swing.JDesktopPane();
jInternalFrame1 = new javax.swing.JInternalFrame();
jMenuBar1 = new javax.swing.JMenuBar();
jMenu1 = new javax.swing.JMenu();
jMenuItem1 = new javax.swing.JMenuItem();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
javax.swing.GroupLayout jInternalFrame1Layout = new javax.swing.GroupLayout(jInternalFrame1.getContentPane());
jInternalFrame1.getContentPane().setLayout(jInternalFrame1Layout);
jInternalFrame1Layout.setHorizontalGroup(
jInternalFrame1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 190, Short.MAX_VALUE)
jInternalFrame1Layout.setVerticalGroup(
jInternalFrame1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 95, Short.MAX_VALUE)
jInternalFrame1.setBounds(80, 40, 200, 130);
jDesktopPane1.add(jInternalFrame1, javax.swing.JLayeredPane.DEFAULT_LAYER);
jMenu1.setText("Menu");
jMenuItem1.setText("Item");
jMenuItem1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jMenuItem1ActionPerformed(evt);
jMenu1.add(jMenuItem1);
jMenuBar1.add(jMenu1);
setJMenuBar(jMenuBar1);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(jDesktopPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 484, Short.MAX_VALUE)
.addGap(20, 20, 20))
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jDesktopPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 279, Short.MAX_VALUE)
pack();
}// </editor-fold>
private void jMenuItem1ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
jInternalFrame1.setVisible(true);
* @param args the command line arguments
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new NewJFrame().setVisible(true);
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exception e) {
e.printStackTrace();
// Variables declaration - do not modify
private javax.swing.JDesktopPane jDesktopPane1;
private javax.swing.JInternalFrame jInternalFrame1;
private javax.swing.JMenu jMenu1;
private javax.swing.JMenuBar jMenuBar1;
private javax.swing.JMenuItem jMenuItem1;
// End of variables declaration
}Edited by: Boxie on Jan 7, 2008 11:23 PM -
Problem with Java 5 and Oracle 10g JDBC driver
Hi All,
Currently we upgrade our web application to Java 5 and Oracle 10.2 JDBC driver. And we encountered a bug, when the user entered the information through UI and data didn't store into database (Oracle 9i). The problem is that this bug is not happend so often maybe once a day and this did not happen before we upgraded to Java 5 and Oracle 10.2 JDBC driver. Does anyone encounter the same problem ? Is this Java 5 problem or Oracle JDBC driver problem ?
Thanks,sounds like a database problem...
Are you using a driver version that's supported for your database engine?
What else did you change? We once ran into a major bug in our application that had for 5 years been masked by performance problems in our hardware and infrastructure.
Once those were resolved the bug showed itself and caused tens of thousands of records to be erroneously inserted into our database every day.
It's certainly NOT a problem with your JVM (if it's a decent one, like the Sun implementation).
So it's either your database, your driver, your network (dropping packets???), or your application.
The upgrade may just have exposed something that was already there. -
Crystal Reports XI and Sun One 6.1 web server SP 5 Error finding JNDI name
I am trying to create a Crystal Reports XI report in a JSP using Sun One 6.1 Web server sp 5.
At this point I am getting the error �Error finding JNDI name� on Sun One
The application will run on Netbeans/Tomcat
I have done the following:
I edited CRConfig.xml
<?xml version="1.0" encoding="utf-8"?>
<CrystalReportEngine-configuration>
�
<DataDriverCommon>
<JavaDir>C:\Program Files\Java\j2re1.4.2_10\bin</JavaDir>
<Classpath>C:\oracle\product\10.2.0\client_1\jdbc\lib\ojdbc14.jar;�</Classpath>
�
<JDBC>
<CacheRowSetSize>100</CacheRowSetSize>
<JDBCURL>jdbc:oracle:thin:@10.10.10.10:1521:dev</JDBCURL>
<JDBCClassName>oracle.jdbc.driver.OracleDriver</JDBCClassName>
<JDBCUserName>lab_ro</JDBCUserName>
<JNDIURL></JNDIURL>
�
</JDBC>
I created a report using JDBC (JNDI) connection and have the JNDI Connection set to the name of DATA.
The report works just fine in Crystal Reports.
Then in Netbeans I created an application and it runs in the Tomcat part of Netbeans
In context.xml I have:
<Context path="/BOEnterpriseTest3">
<Resource name="jdbc/dev" auth="Container" type="javax.sql.DataSource"
driverClassName="oracle.jdbc.driver.OracleDriver" url="jdbc:oracle:thin:@10.10.10.10:1521:dev"
username="theuserid" password="thepassword" maxActive="20" maxIdle="10" maxWait="-1"/>
</Context>
In web.xml I have
<web-app>
<context-param>
<param-name>crystal_image_uri</param-name>
<param-value>crystalreportviewers11</param-value>
</context-param>
�
<taglib>
<taglib-uri>/crystal-tags-reportviewer.tld</taglib-uri>
<taglib-location>/WEB-INF/crystal-tags-reportviewer.tld</taglib-location>
</taglib>
<resource-ref>
<description>jdbc:oracle:thin:@10.10.10.10:1521:dev</description>
<res-ref-name>jdbc/dev10g</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Application</res-auth>
<res-sharing-scope>Shareable</res-sharing-scope>
</resource-ref>
<resource-ref>
<description>jdbc:oracle:thin:@10.10.10.10:1521:dev</description>
<res-ref-name>Data</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Application</res-auth>
<res-sharing-scope>Shareable</res-sharing-scope>
</resource-ref>
</web-app>
in web-inf\sun-web.xml I have
<sun-web-app>
<resource-ref>
<res-ref-name>jdbc/dev10g</res-ref-name>
<jndi-name>Data</jndi-name>
</resource-ref>
</sun-web-app>
I have copied all of Common Files\Business Objects\3.0\java\lib and Common Files\Business Objects\3.0\java\lib\external to the lib folder
I have copied crystalreportviewers11 to the root of my web application
I have tried to load the JNDI information and display the report
<%@page pageEncoding="UTF-8"
import="com.crystaldecisions.reports.reportengineinterface.*,
com.crystaldecisions.report.web.viewer.*,
javax.naming.*,
javax.sql.*,
java.sql.*"%>
<%
InitialContext initContext = new InitialContext();
DataSource source = (DataSource) initContext.lookup("java:comp/env/jdbc/dev10g");
Context initCtx = new InitialContext();
Context envCtx = (Context) initCtx.lookup("java:comp/env");
try{
// Look up our data source
DataSource ds = (DataSource)initCtx.lookup("Data");
out.println("found ds under jdbc/Data");
catch ( NamingException e ){
// Look up our data source
DataSource ds = (DataSource) initContext.lookup("java:comp/env/jdbc/dev10g");
initCtx.bind("Data", ds);
out.println("found ds under java:com/env:jdbc/Data - bound into root initial context for Crystal to find");
%>
<%
//Use the relative path to the report; the physical or full qualified URL cannot be used.
String reportName = "useridincluded.rpt";
//Database username and password
String userName = "theuserid";
String password = "thepassword";
//check to see if the Report Source Session Variable already exist
Object reportSource = session.getAttribute("Report1");
// Create a new ConnectionInfos and ConnectionInfo object
com.crystaldecisions.sdk.occa.report.data.ConnectionInfos connectionInfos = new com.crystaldecisions.sdk.occa.report.data.ConnectionInfos();
com.crystaldecisions.sdk.occa.report.data.ConnectionInfo connectionInfo = new com.crystaldecisions.sdk.occa.report.data.ConnectionInfo();
//Set username and password for the report's database
connectionInfo.setUserName(userName);
connectionInfo.setPassword(password);
//Add object to collection
connectionInfos.add(connectionInfo);
//---------- Create a ReportClientDocument -------------
com.crystaldecisions.reports.sdk.ReportClientDocument reportClientDocument = new com.crystaldecisions.reports.sdk.ReportClientDocument();
//---------- Set the path to the location of the report soruce -------------
//Open report.
reportClientDocument.open(reportName, 0);
//Get the report source
reportSource = reportClientDocument.getReportSource();
//---------- Create the viewer and render the report -------------
//create the CrystalReportViewer object
com.crystaldecisions.report.web.viewer.CrystalReportViewer crystalReportViewer = new com.crystaldecisions.report.web.viewer.CrystalReportViewer();
//set the reportsource property of the viewer
crystalReportViewer.setReportSource(reportSource);
//set the DB logon into the viewer
crystalReportViewer.setDatabaseLogonInfos(connectionInfos);
//set viewer attributes
crystalReportViewer.setOwnPage(true);
crystalReportViewer.setOwnForm(true);
crystalReportViewer.refresh();
//set the CrystalReportViewer print mode
//crystalReportViewer.setPrintMode(com.crystaldecisions.report.web.viewer.CrPrintMode.ACTIVEX);
crystalReportViewer.setPrintMode(com.crystaldecisions.report.web.viewer.CrPrintMode.PDF);
//process the report
crystalReportViewer.processHttpRequest(request, response, getServletConfig().getServletContext(), null);
%>
On the Sun One Web server
On the Java Tab
JDBC Connection Pools
Pool Name = dev10g
Class name = oracle.jdbc.pool.OracleDataSource
User id = theuserid
url = 10.10.10.10
password=thepassword
JDBC Resources
JNDI Name=dev10g
Pool = dev10g
I get the error finding JNDI name � how do I tell Sun One where the JNDI is to make Crystal Reports work?I tried the following to test the JNDI
I am trying to do JNDI in Sun One Web server 6.1 sp 5 but I seem to be missing an important part. I get two different errors based on the JSP code, �Cannot retrieve data source: javax.naming.NamingException: Cannot create resource instance� or �Cannot retrieve data source: javax.naming.NamingException: Cannot create resource instance�.
Context.xml:
<?xml version="1.0" encoding="UTF-8"?>
<Context path="/BOTest">
<Resource name="jdbc/dev10g" auth="Container" type="javax.sql.DataSource"
driverClassName="oracle.jdbc.driver.OracleDriver" url="jdbc:oracle:thin:@10.10.10.10:1521:dev10g"
username="userid" password="password" maxActive="20" maxIdle="10" maxWait="-1"/>
<Resource name="Data" auth="Container" type="javax.sql.DataSource"
driverClassName="oracle.jdbc.driver.OracleDriver" url="jdbc:oracle:thin:@10.10.10.10:1521:dev10g"
username="userid" password="password" maxActive="20" maxIdle="10" maxWait="-1"/>
</Context>Sun-one.xml:
<sun-web-app>
<context-root>BOTest</context-root>
<resource-ref>
<res-ref-name>jdbc/dev10g</res-ref-name>
<jndi-name>jdbc/dev10g</jndi-name>
</resource-ref>
</sun-web-app>web.xml:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
<session-config>
<session-timeout>
30
</session-timeout>
</session-config>
<welcome-file-list>
<welcome-file>
index.jsp
</welcome-file>
</welcome-file-list>
<resource-ref>
<description>jdbc:oracle:thin:@10.10.10.10:1521:dev10g</description>
<res-ref-name>jdbc/dev10g</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Application</res-auth>
<res-sharing-scope>Shareable</res-sharing-scope>
</resource-ref>
<resource-ref>
<description>jdbc:oracle:thin:@10.10.10.10:1521:dev10g</description>
<res-ref-name>Data</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Application</res-auth>
<res-sharing-scope>Shareable</res-sharing-scope>
</resource-ref>
</web-app>server.xml has:
<RESOURCES>
- <JDBCCONNECTIONPOOL name="dev10g" datasourceclassname="oracle.jdbc.pool.OracleDataSource" steadypoolsize="8" maxpoolsize="32" poolresizequantity="2" idletimeout="300" maxwaittime="60000" connectionvalidationrequired="off" connectionvalidationmethod="auto-commit" validationtablename="" failallconnections="off" transactionisolationlevel="read-uncommitted" isolationlevelguaranteed="off">
<PROPERTY name="URL" value="jdbc:oracle:thin:@10.45.3.197:1521:dev10g" />
<PROPERTY name="User" value="lab_ro" />
<PROPERTY name="Password" value="0asphalt1" />
</JDBCCONNECTIONPOOL>
<JDBCRESOURCE jndiname="jdbc/dev10g" poolname="dev10g" enabled="on" />
<JDBCRESOURCE jndiname="Data" poolname="dev10g" enabled="on" />
- <JDBCCONNECTIONPOOL name="Data" datasourceclassname="oracle.jdbc.pool.OracleDataSource" steadypoolsize="8" maxpoolsize="32" poolresizequantity="2" idletimeout="300" maxwaittime="60000" connectionvalidationrequired="off" connectionvalidationmethod="auto-commit" validationtablename="" failallconnections="off" transactionisolationlevel="read-uncommitted" isolationlevelguaranteed="off">
<PROPERTY name="User" value="lab_ro" />
<PROPERTY name="URL" value="jdbc:oracle:thin:@10.45.3.197:1521:dev10g" />
<PROPERTY name="Password" value="0asphalt1" />
</JDBCCONNECTIONPOOL>
<JDBCRESOURCE jndiname="jdbc/Data" poolname="Data" enabled="on" />
<JDBCRESOURCE jndiname="dev10g" poolname="dev10g" enabled="on" />
</RESOURCES>I am getting the following error: �Cannot retrieve data source: javax.naming.NamingException: Cannot create resource instance�
With the following code:
<%@page
import="java.io.*,
javax.sql.*,
javax.naming.*,
java.sql.*,
java.util.*"%>
<%
Context init;
Context ctx;
DataSource datasource;
Connection con;
try
init = new InitialContext();
Context envCtx = (Context) init.lookup("java:comp/env");
datasource = (DataSource) envCtx.lookup("jdbc/dev10g");
catch(NamingException ex)
out.print("Cannot retrieve data source: " + ex.toString(true));
return;
try
con = datasource.getConnection();
catch (Exception e)
out.print("Cannot retrieve connection: " + e.toString());
return;
try
PreparedStatement pstmt = con.prepareStatement("SELECT PROJNO FROM MATERIALSLAB.VW_ASPHALTHEADERINFO");
ResultSet results = pstmt.executeQuery();
while (results.next())
out.println(results.getString(1));
catch(Exception ex)
out.print("Got connection, can't execute query: " + ex.toString());
return;
%>I get the following error: Cannot retrieve data source: javax.naming.NamingException: Cannot create resource instance
With the following code:
<%@page
import="java.io.*,
javax.sql.*,
javax.naming.*,
java.sql.*,
java.util.*"%>
<%
Context init;
Context ctx;
DataSource datasource;
Connection con;
try
init = new InitialContext();
ctx = (Context) init.lookup("java:comp/env");
datasource = (DataSource) ctx.lookup("jdbc/dev10g");
catch(NamingException ex)
out.print("Cannot retrieve data source: " + ex.toString(true));
return;
try
con = datasource.getConnection();
catch (Exception e)
out.print("Cannot retrieve connection: " + e.toString());
return;
try
PreparedStatement pstmt = con.prepareStatement("SELECT PROJNO FROM MATERIALSLAB.VW_ASPHALTHEADERINFO");
ResultSet results = pstmt.executeQuery();
while (results.next())
out.println(results.getString(1));
catch(Exception ex)
out.print("Got connection, can't execute query: " + ex.toString());
return;
%> -
Replace Quotes, Connection Pooling, and Sun Web Server with MySQL, Oracle
This is code I use to insert data into my MySQL and Oracle databases.
I takes care of quotes and shows use of context, i.e. when you use Sun Web Server's
ConnectionPooling. This code works. Feel free to reply if you have questions on how to set up connection pooling using Sun Web Server 6.1SP - it took quite a long time to learn and I couldn't find much information throughout the web, so I hope this helps...
This is not a question and I am not looking for an answer, but please post comments or suggestions.
dailysun
This is in one class where I have a hashtable containing the
column name / value pairs that I want to enter into my table.
This class simply creates the SQL string from the values in the
hashtable. It then passes that hashtable including the database
name to a class which executes that sql statement (second code
portion).
/* Insert data into sf_parts. Create the column strings from
* the provided hash table. Be sure to parse out hash elements which
* are used for the createTemplate process
StringBuffer values = new StringBuffer();
StringBuffer fields = new StringBuffer();
Enumeration keys = fieldHash.keys();
while(keys.hasMoreElements()){
Object currentKey = keys.nextElement();
String fieldValue = (String) fieldHash.get(currentKey);
if(values.length() >0){
values.append(",");
values.append("'"+fieldValue.replaceAll("'","''")+"'"); // Takes care of quotes and various other special characters!
if(fields.length() >0){
fields.append(",");
fields.append(currentKey);
sql = "INSERT INTO myTable (" + fields.toString() + ") VALUES (" + values.toString() + ");";
String insertResult = caq.getInsertDelete(sql,"myDatabaseName"); // your database name is defined in web.xml and sun-web.xml when you use Sun Web Server's Connection Pooling.
returnValue += "<br><br><b>Rows inserted into table(myTable): </b>" + insertResult + "<br>\n";
And, like I describe above, this method executes the sql statement.
* Takes care of insert, update and delete requests.
* Must have set both dbName as well as the sql String.
* Will return number of rows affected as String.
* @return String Number of rows affected
* @exception SQLException
* @exception Exception
public String getInsertDelete() {
checkData(); // this simply checks if the variables dbName and sql are not empty ;-)
InitialContext initContext = null;
int rv = 0;
try{
// Get connection from configured pool
initContext = new InitialContext();
source = (DataSource) initContext.lookup("java:comp/env/jdbc/" + dbName); // I have this set up in web.xml and sun-web.xml (I use Sun Web Server 6.1SP which does connection pooling for me)
conn = source.getConnection();
if(conn != null){
stmt = conn.createStatement();
rv = stmt.executeUpdate(sql);
}catch (SQLException e){
// do something
}catch (Exception e){
// do something
}finally{
try{
stmt.close();
}catch(Exception e){
// do something
try{
conn.close();
}catch(Exception e){
// do something
try{
initContext.close();
}catch(Exception e){
// do something
return rv+"";
}This is code I use to insert data into my MySQL and
Oracle databases.
I takes care of quotes and shows use of context, i.e.
when you use Sun Web Server's
ConnectionPooling. This code works. Feel free to
reply if you have questions on how to set up
connection pooling using Sun Web Server 6.1SP - it
took quite a long time to learn and I couldn't find
much information throughout the web, so I hope this
helps...
This is not a question and I am not looking for an
answer, but please post comments or suggestions.Using prepared statements would mean that you wouldn't have to worry about quotes.
You should be closing the result set.
You are handling all fields as strings. That won't work with time fields and might not work for numeric fields.
Presumably most of your variables are member variables. They should be local variables because that is the scope of the usage.
You must do something with the exceptions.
Hashtables although convienent mean that problems with usage can only be resolved at run time rather than compile time. -
Hi all,
can any one provide some material on java ,ABA and XSLT mapping(as i got requirement on my current project)..
thanks in advance.
regards
krish..Hi
All mapping related links
There is no hard and fast rule for using the mapping techniques.
Graphical Mapping is used for simple mapping cases. When, the logic for your mapping is simple and straight forward and it does not involve any complex logic.
Java and XSLT mapping are used when graphical mapping cannot help you and you have multilevel hierarchy structure data.
When the choice is between Java and XSLT, XSLT is simpler than java mapping and easier. But, it has its drawbacks. One among them being that you cannot use Java APIs and Classes in it. There might be cases in your mapping when you will have to perform something like a properties file look up or a DB lookup, such scenarios are not possible in XSLT and so, when you want to use some specific Java API's you will have to go for Java Mapping.
Java Mapping uses 2 types of parsers. DOM and SAX. DOM is easier to use with lots of classes to help you create nodes and elements, but, DOM is very processor intensive.
SAX parser is something that parses your XML one after the other, and so is not processor intensive. But, it is not exactly easy to develop either.
To know more about each of them please go thru the following links. And if you ask me your which is better, it depends basically on the scenario you implementing and the complexity involved. Anyways please go thru the following links:
Graphical mapping
http://help.sap.com/saphelp_nw04/helpdata/en/6d/aadd3e6ecb1f39e10000000a114084/content.htm
http://help.sap.com/saphelp_nw04/helpdata/en/43/c4cdfc334824478090739c04c4a249/content.htm
/people/bhanu.thirumala/blog/2006/02/02/graphical-message-mapping-150-text-preview
http://www.sapgenie.com/netweaver/xi/mapping1.htm
/people/alessandro.guarneri/blog/2006/01/26/throwing-smart-exceptions-in-xi-graphical-mapping
XSLT mapping
http://help.sap.com/saphelp_nw04/helpdata/en/73/f61eea1741453eb8f794e150067930/content.htm
http://www.w3.org/TR/xslt20/
JAVA mapping
http://help.sap.com/saphelp_nw04/helpdata/en/e2/e13fcd80fe47768df001a558ed10b6/content.htm
DOM parser API
http://java.sun.com/j2se/1.4.2/docs/api/org/w3c/dom/package-frame.html
ABAP mapping
/people/r.eijpe/blog
To know more about the value mapping tools for the SAP Exchange Infrastructure (XI), please go thru the following link:
http://www.applicon.dk/fileadmin/filer/XI_Tools/ValueMappingTool.pdf
To get an idea as to what value mapping is, please go thru the following links:
http://help.sap.com/saphelp_nw04/helpdata/en/13/ba20dd7beb14438bc7b04b5b6ca300/frameset.htm
http://help.sap.com/saphelp_nw04/helpdata/en/f2/dfae3d47afd652e10000000a114084/frameset.htm
http://help.sap.com/saphelp_nw04/helpdata/en/2a/9d2891cc976549a9ad9f81e9b8db25/content.htm
most of the links that I have provided also helps you get the step by step procedure of doing the same. And also involves the procedure to implement certain advanced features.
And please go through this link which clearly explains the 3 types of mappings.
/people/ravikumar.allampallam/blog/2005/02/10/different-types-of-mapping-in-xi
regards
Prasad -
Calling a javascript function from java code and getting tha value in Java
Hi,
I would like to call a Java script function confirmRemove() from Java code upon meeting a condition..
for example the code snippet is:
if(true){
// I want to call js confirmRemove() over here. And get the value of variable "answer" in this if block.
<html>
<head>
<script type="text/javascript">
function confirmRemove() {
var answer = confirm("Are you sure you want to Delete?")
</script>
</head>
<body>
<form>...Hi,
Back in 2003 I have used an Applet which contain java code and this java code was calling the java scripts ( different methods, DHTML etc..)
There was a component developed by NetScape called JSObject I am not sure it there is other third party component other then the JSObject
look at this article which shows how (based on JSObject)
[http://java.sun.com/products/plugin/1.3/docs/jsobject.html|http://java.sun.com/products/plugin/1.3/docs/jsobject.html]
Regards,
Alan Meio
London,UK -
JDK 1.6 on Solaris. Multiple java processes and thread freezes
Hi, we've come across a really weird behavior on the Solaris JVM, reported by a customer of ours.
Our server application consists of multiple threads. Normally we see them all running within a single Java process, and all is fine.
At some point in time, and only on Solaris 10, it seems that the main Java process starts a second Java process. This is not our code trying to execute some other application/command. It's the JVM itself forking a new copy of itself. I assumed this was because of some JVM behaviour on Solaris that uses multiple processes if the number of threads is > 128. However at the time of spawn there are less than 90 threads running.
In any case, once this second process starts, some of the threads of the application (incidentally, they're the first threads created by the application at startup, in the first threadgroup) stop working. Our application dumps a list of all threads in the system every ten minutes, and even when they're not working, the threads are still there. Our logs also show that when the second process starts, these threads were not in the running state. They had just completed their operations and were sleeping in their thread pool, in a wait() call. Once the second process starts, jobs for these threads just queue up, and the wait() does not return, even after another thread has done a notify() to inform them of the new jobs.
Even more interesting, when the customer manually kills -9 the second process, without doing anything in our application, all threads that were 'frozen' start working again, immediately. This (and the fact that this never happens on other OSes) makes us think that this is some sort of problem (or misconfiguration) specific to the Solaris JVM, and not our application.
The customer initially reported this with JDK 1.5.0_12 , we told them to upgrade to the latest JDK 1.6 update 6, but the problem remains. There are no special JVM switches (apart from -Xms32m -Xmx256m) used. We're really at a dead end here in diagnosing this problem, as it clearly seems to be outside our app. Any suggestion?Actually, we've discovered that that's not really what was going on. I still believe there's a bug in the JVM, but the fork was happening because our Java code tries to exec a command line tool once a minute. After hours of this, we get a rogue child process with this stack (which is where we are forking this command line tool once a minute):
JVM version is 1.5.0_08-b03
Thread t@38: (state = IN_NATIVE)
- java.lang.UNIXProcess.forkAndExec(byte[], byte[], int, byte[], int, byte[], boolean, java.io.FileDescriptor, java.io.FileDescriptor, java.io.FileDescriptor) @bci=168980456 (Interpreted frame)
- java.lang.UNIXProcess.forkAndExec(byte[], byte[], int, byte[], int, byte[], boolean, java.io.FileDescriptor, java.io.FileDescriptor, java.io.FileDescriptor) @bci=0 (Interpreted frame)
- java.lang.UNIXProcess.<init>(byte[], byte[], int, byte[], int, byte[], boolean) @bci=62, line=53 (Interpreted frame)
- java.lang.ProcessImpl.start(java.lang.String[], java.util.Map, java.lang.String, boolean) @bci=182, line=65 (Interpreted frame)
- java.lang.ProcessBuilder.start() @bci=112, line=451 (Interpreted frame)
- java.lang.Runtime.exec(java.lang.String[], java.lang.String[], java.io.File) @bci=16, line=591 (Interpreted frame)
- java.lang.Runtime.exec(java.lang.String, java.lang.String[], java.io.File) @bci=69, line=429 (Interpreted frame)
- java.lang.Runtime.exec(java.lang.String) @bci=4, line=326 (Interpreted frame)
- java.lang.Thread.run() @bci=11, line=595 (Interpreted frame)There are also several dozen other threads all with the same stack:
Thread t@32: (state = BLOCKED)
Error occurred during stack walking:
sun.jvm.hotspot.debugger.DebuggerException: can't map thread id to thread handle!
at sun.jvm.hotspot.debugger.proc.ProcDebuggerLocal.getThreadIntegerRegisterSet0(Native Method)
at sun.jvm.hotspot.debugger.proc.ProcDebuggerLocal.getThreadIntegerRegisterSet(ProcDebuggerLocal.java:364)
at sun.jvm.hotspot.debugger.proc.sparc.ProcSPARCThread.getContext(ProcSPARCThread.java:35)
at sun.jvm.hotspot.runtime.solaris_sparc.SolarisSPARCJavaThreadPDAccess.getCurrentFrameGuess(SolarisSPARCJavaThreadPDAccess.java:108)
at sun.jvm.hotspot.runtime.JavaThread.getCurrentFrameGuess(JavaThread.java:252)
at sun.jvm.hotspot.runtime.JavaThread.getLastJavaVFrameDbg(JavaThread.java:211)
at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:50)
at sun.jvm.hotspot.tools.JStack.run(JStack.java:41)
at sun.jvm.hotspot.tools.Tool.start(Tool.java:204)
at sun.jvm.hotspot.tools.JStack.main(JStack.java:58)I'm pretty sure this is because the fork part of the UnixProcess.forkAndExec is using the Solaris fork1 system call, and thus all the Java context thinks all those threads exist, whereas the actual threads don't exist in that process.
It seems to me that something is broken in UnixProcess.forkAndExec in native code; it did the fork, but not the exec, and this exec thread just sits there forever. And of course, it's still holding all the file descriptors of the original process, which means that if we decide to restart our process, we can't reopen our sockets for listening or whatever else we want to do.
There is another possibility, which I can't completely rule out: this child process just happened to be the one that was fork'd when the parent process called Runtime.halt(), which is how the Java process exits. We decided to exit halfway through a Runtime.exec(), and got this child process stuck. But I don't think that's what happens... from what I understand that we collected, we see this same child process created at some point in time, and it doesn't go away.
Yes, I realize that my JVM is very old, but I cannot find any bug fixes in the release notes that claim to fix something like this. And since this only happens once every day or two, I'm reluctant to just throw a new JVM at this--although I'm sure I will shortly.
Has anyone else seen anything like this? -
Java Applets and multiple classes not working.
I have tested my JApplet class alone to view its layout and to make sure it actually works. But once I add in my other classes, compile, jar, and test I get the error:
java.lang.NoClassDefFoundError: AlakApp (wrong name: alak/codeFiles/AlakApp)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:12
4)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
at java.net.URLClassLoader.access$000(URLClassLoader.java:56)
at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at sun.applet.AppletClassLoader.findClass(AppletClassLoader.java:155)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.applet.AppletClassLoader.loadClass(AppletClassLoader.java:127)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at sun.applet.AppletClassLoader.loadCode(AppletClassLoader.java:618)
at sun.applet.AppletPanel.createApplet(AppletPanel.java:779)
at sun.applet.AppletPanel.runLoader(AppletPanel.java:708)
at sun.applet.AppletPanel.run(AppletPanel.java:362)
at java.lang.Thread.run(Thread.java:619)My Directory contains these and only these:
F:\alak\codeFiles:
AlakApp.java
Game.java
Board.java
Space.java
index.html
AlakGame.jarAll my classes are in the package alak.codeFiles.
My .html file contains this:
<HTML>
<HEAD>
<TITLE>ALAK</TITLE>
</HEAD>
<BODY>
<applet code="AlakApp.class" archive="AlakGame.jar" width=400 height=200>
Please use a Java compatible browser to see this.
</applet>
<br>
</BODY>
</HTML>These are they commands I am issuing:
F:\alak\codeFiles>javac *.java
F:\alak\codeFiles>jar -cvf AlakGame.jar *.class
F:\alak\codeFiles>appletviewer index.htmlI've been trying many different things to narrow down what is going on. If you need to see my code let me know, but I've tested everything with a text-based user interface and they work.
So does anyone know the cause of this error?Ok i rared the test and uploaded to rapidshare.. here is the link:
http://rapidshare.com/files/76860865/test.rar.html
But here is the code. They are in the directory /test/files/
ADigit.java
package test.files;
public class ADigit
private int value;
public ADigit( int val )
this.value = val;
public String toString()
return "" + this.value;
}ADigitApp.java
package test.files;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class ADigitApp extends JApplet implements ActionListener
private ADigit numeroUno;
private int currentNum;
private Container container;
private javax.swing.JLabel jLabel;
private javax.swing.JTextArea jTextArea;
private javax.swing.JButton jButton;
public void init()
currentNum = 1;
numeroUno = new ADigit( currentNum );
container = getContentPane();
container.setLayout( new BorderLayout() );
jLabel = new javax.swing.JLabel();
jTextArea = new javax.swing.JTextArea();
jLabel.setText( "The Number is: " );
jTextArea.setText( numeroUno.toString() );
jButton = new javax.swing.JButton();
jButton.setText( "New Number" );
jButton.addActionListener( this );
container.add( jLabel, BorderLayout.WEST );
container.add( jTextArea, BorderLayout.CENTER );
container.add( jButton, BorderLayout.EAST );
setSize( 200, 200 );
public void actionPerformed( ActionEvent e )
this.currentNum++;
numeroUno = new ADigit( this.currentNum );
jTextArea.setText( numeroUno.toString() );
}index.html
<HTML>
<HEAD>
<TITLE>NUMBERSSSS</TITLE>
</HEAD>
<BODY>
<applet code="ADigitApp.class" archive="NumberFun.jar" width=200 height=200>
Please use a Java compatible browser to see this.
</applet>
<br>
</BODY>
</HTML>Commands:
/test/files>javac *.java
/test/files>jar -cvf NumberFun.jar *.class
/test/files>appletviewer index.htmlThis example produces the same style of error. -
Open Forte for java project in Sun java studio enterprise
Hi Everyone, I am new to Java development. I have a java application developed in Forte for java 4 and I need to open and compile it in Sun java studio enterprise. Could anybody tell me how to do that? Thank you very much.
The recent versions of the IDE (starting with NetBeans 4.1 and JSE 8) are based on a more-robust project system that is ant based. Projects from Forte for Java 4, unfortunately, cannot be directly opened in JSE8, NB4.1 and later.
If you do have access to the original source code, pl. try the following in the latest version of JSE or NetBeans:
- Create a fresh project in jse using File | New Project. (For a java standalone app, you would choose General | Java Application from the dialog).
- Add the existing files to the empty project. You can do so by right-clicking on the project, selecting properties and adding the existing source directories under 'Source Packages' in 'Sources' category.
Or from the new project dialog, you could select 'General | Java Project with existing sources' option. -
I am investigating the potential to set and read XMP metadata on TIFF, PDF, and EPS files for a workflow.
I am a Perl/Java person, and upon investigating solutions found the Java XMP Parser. As I read, it appears that I need to create a RDF file. It looks to me that the RDF file is the file that contains the metadata to be inserted. Is there a specification for the RDF?
Also, the SW (java class) says it can only embed into files which have the XML packet already. Any insight here.
In summary, I own the Adobe Graphics Server (Not Document Server), and before pursuing the above ... I welcome validation that I am on the correct path.S_Szenthilkumar wrote:
Actually my requirement is like that.What do you mean by "like that".
What is your requirement?
Is it possible to do this or can not perform this operation?Define "this operation".
It might be that you actually want to use the [Preferences API|http://java.sun.com/javase/6/docs/api/java/util/prefs/Preferences.html] for storing settings. But it's hard to tell what you actually want, since you didn't describe your goal, but only a possible solution. -
XML Digital Signature and sun PKCS#11
Hi,
I am trying to use xmldsig/xmlsec from Java Web Services Developer's Pack to do signing of XML documents. My goal is to use the keys from the card via sunpkcs11 to perform this signature.
At this stage, i'm able to get the correct key from the card via sun pkcs 11 (J2SE 5) and able to sign some data with it.
However, when i try to sign a xml document via xmldsig, i get the error which i believe to occur while trying to read the private key from the card as a string, which results in a "not a byte[]" exception.
At this stage, are there any ways to configure the xmldsig/xmlsec to use the pkcs11 provider?
I understand that the current implementation of XML Digital signature is using apache XML libraries. Is the source code for the wsdp downloadable from SUN?
If not, will it be possible to make use of the open-source apache XML jars, set it up for pkcs11 and use it instead?
Finally, has anyone done what I'm trying to do? Will be glad to know
Thank u in advance,
LouisHello
Did you resolve yout problem, because i have the same when i try to sign message
String testData = "Hello World";
p11KeyStore = KeyStore.getInstance("PKCS11");
p11KeyStore.load(null, new char[] {'1', '2', '3', '4'});
sig = Signature.getInstance("SHA1withRSA");
sig.initSign( (PrivateKey) p11KeyStore.getKey(myAlias, null));
sig.update(testData.getBytes());
signatureBytes = sig.sign()
This code fails and i get java.lang.RuntimeException: Not a byte[]
at sun.security.pkcs11.wrapper.CK_ATTRIBUTE.getBigInteger(CK_ATTRIBUTE.java:168)
at sun.security.pkcs11.P11Key$P11RSAPrivateKey.fetchValues(P11Key.java:419)
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