J2EE Interview Questions

Jun 18 2007
06:59 AM

1818
Views

0
Ans

How we implement polymorphism in java? What is value pass by reference and value pass by argument in java

sivaprasad

J2EE Interview Questions

Answer Question
May 27 2007
02:57 PM

1517
Views

0
Ans

What are main functions of java virtual machine?

rameshtnj
Profile Answers by rameshtnj Questions by rameshtnj

J2EE Interview Questions

Answer Question
Apr 24 2007
06:17 AM

1848
Views

0
Ans

How new versions of an application get UPDATED in wireless environment (mobiles)

venugopal

J2EE Interview Questions

Answer Question
Apr 18 2007
11:03 AM

1902
Views

0
Ans

How to retrive data in a encrypt form in jsp

abhayanand

J2EE Interview Questions

Answer Question
Apr 16 2007
08:02 AM

1934
Views

0
Ans

How Java interacts with Microsoft DCOM components

joglekaruday
Profile Answers by joglekaruday Questions by joglekaruday

J2EE Interview Questions

Answer Question
Mar 08 2007
12:30 PM

2167
Views

0
Ans

How to access two tables through hibernate ? Can anybody guide us with complete code including the java codes and xml code ?

John

J2EE Interview Questions

Answer Question
Jan 22 2007
09:13 AM

1575
Views

0
Ans

How shall i know whether a perticular mail is new or old using JavaMail.

sk_gazanfar
Profile Answers by sk_gazanfar Questions by sk_gazanfar

J2EE Interview Questions

Answer Question
Jan 22 2007
06:27 AM

2723
Views

0
Ans

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;

public class ModelJTree extends JFrame {

private JTree tree;

private DefaultTreeModel model;

private DefaultMutableTreeNode rootNode,Medievel,Ancient,Philosophers;

public ModelJTree() {
DefaultMutableTreeNode philosophersNode = getPhilosopherTree();
model = new DefaultTreeModel(philosophersNode);
tree = new JTree(model);
JButton addButton = new JButton("Add Philosopher");
addButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
addPhilosopher();
}
});
JButton removeButton = new JButton("Remove Selected Philosopher");
removeButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
removeSelectedPhilosopher();
}
});
JPanel inputPanel = new JPanel();
inputPanel.add(addButton);
inputPanel.add(removeButton);

Container container = getContentPane();

container.add(new JScrollPane(tree), BorderLayout.CENTER);

container.add(inputPanel, BorderLayout.SOUTH);

setDefaultCloseOperation(EXIT_ON_CLOSE);
setSize(400, 300);
setVisible(true);

}

private void addPhilosopher() {
DefaultMutableTreeNode parent = getSelectedNode();
System.out.println(parent);
if (parent == null) {
JOptionPane.showMessageDialog(ModelJTree.this, "Select an area.", "Error",
JOptionPane.ERROR_MESSAGE);

return;
}

String name = JOptionPane.showInputDialog(ModelJTree.this, "Enter Name:");
model.insertNodeInto(new DefaultMutableTreeNode(name), parent, parent.getChildCount());
}

private void removeSelectedPhilosopher() {
DefaultMutableTreeNode selectedNode = getSelectedNode();
if (selectedNode != null)
model.removeNodeFromParent(selectedNode);
}

private DefaultMutableTreeNode getSelectedNode() {
return (DefaultMutableTreeNode) tree.getLastSelectedPathComponent();
}

private DefaultMutableTreeNode getPhilosopherTree() {
DefaultMutableTreeNode rootNode = new DefaultMutableTreeNode("Philosophers");
DefaultMutableTreeNode ancient = new DefaultMutableTreeNode("Ancient");
rootNode.add(ancient);

ancient.add(new DefaultMutableTreeNode("Socrates"));

DefaultMutableTreeNode medieval = new DefaultMutableTreeNode("Medieval",true);
rootNode.add(medieval);
return rootNode;
}
public static void main(String args[]) {
new ModelJTree();
}
}
">
Hi....My question is In a JTree i want to add nodes to only the nodes whose parent is root node.Please help me with this.In the following code it should be possible to add node to "Medieval" but not "socrates.import java.awt.BorderLayout;import java.awt.Container;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JOptionPane;import javax.swing.JPanel;import javax.swing.JScrollPane;import javax.swing.JTree;import javax.swing.tree.DefaultMutableTreeNode;import javax.swing.tree.DefaultTreeModel;public class ModelJTree extends JFrame { private JTree tree; private DefaultTreeModel model; private DefaultMutableTreeNode rootNode,Medievel,Ancient,Philosophers; public ModelJTree() { DefaultMutableTreeNode philosophersNode = getPhilosopherTree(); model = new DefaultTreeModel(philosophersNode); tree = new JTree(model); JButton addButton = new JButton("Add Philosopher"); addButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent event) { addPhilosopher(); } }); JButton removeButton = new JButton("Remove Selected Philosopher"); removeButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent event) { removeSelectedPhilosopher(); } }); JPanel inputPanel = new JPanel(); inputPanel.add(addButton); inputPanel.add(removeButton); Container container = getContentPane(); container.add(new JScrollPane(tree), BorderLayout.CENTER); container.add(inputPanel, BorderLayout.SOUTH); setDefaultCloseOperation(EXIT_ON_CLOSE); setSize(400, 300); setVisible(true); } private void addPhilosopher() { DefaultMutableTreeNode parent = getSelectedNode(); System.out.println(parent); if (parent == null) { JOptionPane.showMessageDialog(ModelJTree.this, "Select an area.", "Error", JOptionPane.ERROR_MESSAGE); return; } String name = JOptionPane.showInputDialog(ModelJTree.this, "Enter Name:"); model.insertNodeInto(new DefaultMutableTreeNode(name), parent, parent.getChildCount()); } private void removeSelectedPhilosopher() { DefaultMutableTreeNode selectedNode = getSelectedNode(); if (selectedNode != null) model.removeNodeFromParent(selectedNode); } private DefaultMutableTreeNode getSelectedNode() { return (DefaultMutableTreeNode) tree.getLastSelectedPathComponent(); } private DefaultMutableTreeNode getPhilosopherTree() { DefaultMutableTreeNode rootNode = new DefaultMutableTreeNode("Philosophers"); DefaultMutableTreeNode ancient = new DefaultMutableTreeNode("Ancient"); rootNode.add(ancient); ancient.add(new DefaultMutableTreeNode("Socrates")); DefaultMutableTreeNode medieval = new DefaultMutableTreeNode("Medieval",true); rootNode.add(medieval); return rootNode; } public static void main(String args[]) { new ModelJTree(); }}

Bhavyams
Profile Answers by Bhavyams Questions by Bhavyams

J2EE Interview Questions

Answer Question
Jan 18 2007
10:15 AM

2697
Views

0
Ans

Connection conn = DriverManager.getConnection("jdbc:oracle:thin:@10.81.7.169:1521:PTS", "TESTPTS", "TESTPTS");
System.out.println("connection established");
PreparedStatement ps = conn.prepareStatement("insert into DEMOBLOB values(?)");
System.out.println("insert executed");
File photo= new File("D:/Thinkingjava.pdf");
System.out.println("image loaded ");
FileInputStream photostream= new FileInputStream(photo);
System.out.println("photo taken");
ps.setBinaryStream(1,photostream,(int)photo.length());
ps.executeUpdate();
photostream.close();

}

catch(Exception e)
{
e.printStackTrace();
}
}
}

above is the code which iam using and below is the exception i am getting

ORA-01460: unimplemented or unreasonable conversion requested

at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:114)
at oracle.jdbc.ttc7.TTIoer.processError(TTIoer.java:208)
at oracle.jdbc.ttc7.Oall7.receive(Oall7.java:542)
at oracle.jdbc.ttc7.TTC7Protocol.doOall7(TTC7Protocol.java:1311)
at oracle.jdbc.ttc7.TTC7Protocol.parseExecuteFetch(TTC7Protocol.java:738)
at oracle.jdbc.driver.OracleStatement.executeNonQuery(OracleStatement.java:1313)
at oracle.jdbc.driver.OracleStatement.doExecuteOther(OracleStatement.java:1232)
at oracle.jdbc.driver.OracleStatement.doExecuteWithBatch(OracleStatement.java:1353)
at oracle.jdbc.driver.OracleStatement.doExecute(OracleStatement.java:1760)
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1807)
at oracle.jdbc.driver.OraclePreparedStatement.executeUpdate(OraclePreparedStatement.java:332)
at PDFConnect.main(PDFConnect.java:24)">
When iam tring to insert a pdf of 2mb in to oracle database.This is my source code.import java.io.File;import java.io.FileInputStream;import java.sql.Connection;import java.sql.DriverManager;import java.sql.PreparedStatement;public class PDFConnect { public static void main(String args[]) { try{ Class.forName("oracle.jdbc.driver.OracleDriver"); Connection conn = DriverManager.getConnection("jdbc:oracle:thin:@10.81.7.169:1521:PTS", "TESTPTS", "TESTPTS"); System.out.println("connection established"); PreparedStatement ps = conn.prepareStatement("insert into DEMOBLOB values(?)"); System.out.println("insert executed"); File photo= new File("D:/Thinkingjava.pdf"); System.out.println("image loaded "); FileInputStream photostream= new FileInputStream(photo); System.out.println("photo taken"); ps.setBinaryStream(1,photostream,(int)photo.length()); ps.executeUpdate(); photostream.close(); } catch(Exception e) { e.printStackTrace(); } } }above is the code which iam using and below is the exception i am gettingORA-01460: unimplemented or unreasonable conversion requested at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:114) at oracle.jdbc.ttc7.TTIoer.processError(TTIoer.java:208) at oracle.jdbc.ttc7.Oall7.receive(Oall7.java:542) at oracle.jdbc.ttc7.TTC7Protocol.doOall7(TTC7Protocol.java:1311) at oracle.jdbc.ttc7.TTC7Protocol.parseExecuteFetch(TTC7Protocol.java:738) at oracle.jdbc.driver.OracleStatement.executeNonQuery(OracleStatement.java:1313) at oracle.jdbc.driver.OracleStatement.doExecuteOther(OracleStatement.java:1232) at oracle.jdbc.driver.OracleStatement.doExecuteWithBatch(OracleStatement.java:1353) at oracle.jdbc.driver.OracleStatement.doExecute(OracleStatement.java:1760) at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1807) at oracle.jdbc.driver.OraclePreparedStatement.executeUpdate(OraclePreparedStatement.java:332) at PDFConnect.main(PDFConnect.java:24)

naresh

J2EE Interview Questions

Answer Question
Nov 21 2006
02:12 PM

1871
Views

0
Ans

Why upgrade from ejb2.0 to ejb3.0 giving comparisons, differences, and advantages.

Kurt Henry

J2EE Interview Questions

Answer Question
Oct 22 2006
05:12 AM

1662
Views

0
Ans

Can anybody help me in how both combiningly webserver & application server Project can run in Eclipse IDE, with source codeif possibe mail 2 me newyuga@rediffmail.com

newyuga
Profile Answers by newyuga Questions by newyuga

J2EE Interview Questions

Answer Question
Oct 12 2006
04:15 PM

1743
Views

0
Ans

Hi all,javax.servlet Interface RequestDispatcher does have method public void include(request, response).According to documentation it includes the content of a resource (servlet, JSP page, HTML file) in the response.My question is does it compile the Jsp page before including or after including it.Thanks

hmashruf
Profile Answers by hmashruf Questions by hmashruf

J2EE Interview Questions

Answer Question
Aug 13 2006
01:50 AM

1580
Views

0
Ans

I have written one applet by using multithreading concept(by implementing Runnable interface)and including it in my JSP page, but the jsp page is unable to load the applet. I have written Plz help me by giving any techinque for including an applet in the jsp page.

questioninterest
Profile Answers by questioninterest Questions by questioninterest

J2EE Interview Questions

Answer Question
Aug 04 2006
04:11 AM

1790
Views

0
Ans

How we can connect to a database in Java without creating DSN and by using JNDI in J2EE Server. Plz give me the technique. Thank U.

questioninterest
Profile Answers by questioninterest Questions by questioninterest

J2EE Interview Questions

Answer Question
Aug 02 2006
08:31 AM

1418
Views

0
Ans

Can we start just Tomcat from jboss server, since i have jboss?

sachinTest
Profile Answers by sachinTest Questions by sachinTest

J2EE Interview Questions

Answer Question
Aug 01 2006
03:57 PM

1307
Views

0
Ans

How to communicate between between two applets. Plz give me the code.

questioninterest
Profile Answers by questioninterest Questions by questioninterest

J2EE Interview Questions

Answer Question
Aug 01 2006
03:55 PM

1460
Views

0
Ans

What is BorderFactory in java

questioninterest
Profile Answers by questioninterest Questions by questioninterest

J2EE Interview Questions

Answer Question
Jul 30 2006
06:23 PM

1956
Views

0
Ans

Hi friends i have one doubt. here my requirement is i want to display multiple images dynamically. for example i have one document having 500 images.i used one combo box there range 1-1011-20,21-30.........like selection is there. initially 1-10 should be displayed on the browser. if i select 21-30 then that range of images should be displayed vertically.plz clarify my doubt.

ashok

J2EE Interview Questions

Answer Question
Jul 26 2006
08:11 AM

1186
Views

0
Ans

1. What are the features added in Ejb 2.0 and struts 1.1?

Sanjay

J2EE Interview Questions

Answer Question
Jul 25 2006
10:48 AM

1403
Views

0
Ans

In java ressultset,statement,preparesatement are interfaces without implementation how to those interfaces

Rams

J2EE Interview Questions

Answer Question

How we implement polymorphism in java? What is value pass by reference and value pass by argument in java

What are main functions of java virtual machine?

How new versions of an application get UPDATED in wireless environment (mobiles)

How to retrive data in a encrypt form in jsp

How Java interacts with Microsoft DCOM components

How to access two tables through hibernate ? Can anybody guide us with complete code including the java codes and xml code ?

How shall i know whether a perticular mail is new or old using JavaMail.

Why upgrade from ejb2.0 to ejb3.0 giving comparisons, differences, and advantages.

Can anybody help me in how both combiningly webserver & application server Project can run in Eclipse IDE, with source codeif possibe mail 2 me newyuga@rediffmail.com

I have written one applet by using multithreading concept(by implementing Runnable interface)and including it in my JSP page, but the jsp page is unable to load the applet. I have written Plz help me by giving any techinque for including an applet in the jsp page.

How we can connect to a database in Java without creating DSN and by using JNDI in J2EE Server. Plz give me the technique. Thank U.

Can we start just Tomcat from jboss server, since i have jboss?

How to communicate between between two applets. Plz give me the code.

What is BorderFactory in java

1. What are the features added in Ejb 2.0 and struts 1.1?

In java ressultset,statement,preparesatement are interfaces without implementation how to those interfaces

Latest News

It looks like you are using an AD Blocker!

Login

J2EE Interview Questions

How we implement polymorphism in java? What is value pass by reference and value pass by argument in java

What are main functions of java virtual machine?

How new versions of an application get UPDATED in wireless environment (mobiles)

How to retrive data in a encrypt form in jsp

How Java interacts with Microsoft DCOM components

How to access two tables through hibernate ? Can anybody guide us with complete code including the java codes and xml code ?

How shall i know whether a perticular mail is new or old using JavaMail.

Why upgrade from ejb2.0 to ejb3.0 giving comparisons, differences, and advantages.

Can anybody help me in how both combiningly webserver & application server Project can run in Eclipse IDE, with source codeif possibe mail 2 me newyuga@rediffmail.com

I have written one applet by using multithreading concept(by implementing Runnable interface)and including it in my JSP page, but the jsp page is unable to load the applet. I have written Plz help me by giving any techinque for including an applet in the jsp page.

How we can connect to a database in Java without creating DSN and by using JNDI in J2EE Server. Plz give me the technique. Thank U.

Can we start just Tomcat from jboss server, since i have jboss?

How to communicate between between two applets. Plz give me the code.

What is BorderFactory in java

1. What are the features added in Ejb 2.0 and struts 1.1?

In java ressultset,statement,preparesatement are interfaces without implementation how to those interfaces

Latest News

It looks like you are using an AD Blocker!