rastogi payam

Hello Everybody,
I had configured DCEVM on intellij, but I think the way I did it is wrong as when I made some change in the java file and ctrl + shift + f9, the tomcat is getting restarted. Can someone please tell me the correct way to configure it.

We have a large file on disk (~1Gb). We are reading that file into memory using java.nio MemoryMappedByteBuffer class. We have limited the in memory file size to 1Mb. Now we need to get the data from this in-memory file and have to process it passed it to the socket as a chunk of 10 Byte.
According to the given information which approach is better
1. Copy the entire data (1Mb) into an array and then process it.
2. In loop - Copy the chunk of size 10 Byte into an array and processs it.

Yes I can see financial terms in the output along with general English terms. Now how can I differentiate between these two categories.

Hi William,
Here is the code which I have written to extract and count the words from the text. What should be my next step. Please advice.
package com.example; import java.io.File; import java.util.ArrayList; import java.util.Collections; import java.util.Comparator; import java.util.Iterator; import java.util.Map; import java.util.Set; import java.util.TreeMap; import org.apache.pdfbox.pdmodel.PDDocument; import org.apache.pdfbox.util.PDFTextStripper; public class ReadPDFTest { public static void main(String args[]) { try { File pathToFile = new File("some_pdf_file.pdf"); PDDocument document = PDDocument.load(pathToFile); PDFTextStripper s = new PDFTextStripper(); String content = s.getText(document); content = content.replaceAll("\\.", " "); content = content.replaceAll("\n", " "); content = content.replaceAll(":", " "); content = content.replaceAll(";", " "); content = content.replaceAll(",", " "); content = content.replaceAll("\""," "); content = content.replaceAll("\""," "); content = content.replaceAll("“", " "); content = content.replaceAll("”", " "); ArrayList<String> list = new ArrayList<String>(); String[] strArr = content.split("\\s+"); Map<String, Integer> map = new TreeMap<String, Integer>(); for(int i=0 ;i<strArr.length;i++) { list.add(strArr[i]); } Collections.sort(list,ALPHABETICAL_ORDER); for(int i=0; i<list.size();i++) { String str = list.get(i); if( !map.containsKey(str) ) { map.put(str, 1 ); } else { map.put(list.get(i), map.get(str) + 1 ); } } Set<String> set = map.keySet(); Iterator<String> it = set.iterator(); while(it.hasNext()) { String str = it.next(); System.out.println(str+" = "+map.get(str)); } } catch(Exception e) { e.printStackTrace(); } } private static Comparator<String> ALPHABETICAL_ORDER = new Comparator<String>() { public int compare(String str1, String str2) { int res = String.CASE_INSENSITIVE_ORDER.compare(str1, str2); if (res == 0) { res = str1.compareTo(str2); } return res; } }; }

Hi All,

I have a PDF file which I parsed into text using PDFBox API, now I want to extract finance related terms/words and their frequency from that text file. I also googled for the same and found that we can use GATE/OpenNLP but didn't find any concrete example. Please help.

Thanks

Hi All,

The code below is running fine until I select a checkbox to add a column dynamically in a table. After the new column is added in the table, if I click on the header of the table all the newly added column disappears and the table resets to the initial condition. I think it's because i didn't configure table column listener or something.. please help.

What I want is when we click any checkbox the column should be added/removed accordingly from the table and and when we click table header nothing should happen. On clicking the cell inside the table we should be able to edit it.

package com.example; import java.awt.EventQueue; import java.awt.Frame; import java.awt.Toolkit; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.util.ArrayList; import javax.swing.JFrame; import javax.swing.JMenuBar; import javax.swing.JMenu; import javax.swing.JMenuItem; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.border.EtchedBorder; import javax.swing.JTextArea; import javax.swing.JTextField; import javax.swing.JTable; import javax.swing.table.DefaultTableModel; import javax.swing.border.TitledBorder; import javax.swing.JCheckBox; public class InvoiceScreen { private JFrame frame; private JTextField tFBillNo; private JTextField tfDate; private JTable tableInvoice; private JCheckBox chckbxItems; private JCheckBox chckbxQuantity; private JCheckBox chckbxRate; private JCheckBox chckbxAmount; private JCheckBox chckbxTax; private JCheckBox chckbxDiscount; /** * Launch the application. */ public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { public void run() { try { InvoiceScreen window = new InvoiceScreen(); window.frame.setVisible(true); } catch (Exception e) { e.printStackTrace(); } } }); } /** * Create the application. */ public InvoiceScreen() { initialize(); } /** * Initialize the contents of the frame. */ private void initialize() { frame = new JFrame("Test"); Toolkit tk = Toolkit.getDefaultToolkit(); int xSize = ((int) tk.getScreenSize().getWidth()); int ySize = ((int) tk.getScreenSize().getHeight()); frame.setSize(1159,794); frame.setExtendedState(Frame.MAXIMIZED_BOTH); //frame.setUndecorated(true); //frame.setBounds(100, 100, 450, 300); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.getContentPane().setLayout(null); JMenuBar menuBar = new JMenuBar(); menuBar.setBounds(0, 0, 1151, 21); frame.getContentPane().add(menuBar); JMenu mnInvoice = new JMenu("Invoice"); menuBar.add(mnInvoice); JMenuItem mntmNew = new JMenuItem("New"); mnInvoice.add(mntmNew); JPanel panelName = new JPanel(); panelName.setBorder(new EtchedBorder(EtchedBorder.LOWERED, null, null)); panelName.setBounds(10, 73, 337, 126); frame.getContentPane().add(panelName); panelName.setLayout(null); JLabel lblName = new JLabel("Name/Address"); lblName.setBounds(10, 10, 114, 14); panelName.add(lblName); JScrollPane scrollPaneName = new JScrollPane(); scrollPaneName.setBounds(10, 30, 317, 86); panelName.add(scrollPaneName); JTextArea taName = new JTextArea(); taName.setLineWrap(true); scrollPaneName.setViewportView(taName); JPanel panelBillNo = new JPanel(); panelBillNo.setBorder(new EtchedBorder(EtchedBorder.LOWERED, null, null)); panelBillNo.setBounds(10, 27, 1131, 40); frame.getContentPane().add(panelBillNo); panelBillNo.setLayout(null); JLabel lblBillNo = new JLabel("Bill No."); lblBillNo.setBounds(10, 10, 46, 14); panelBillNo.add(lblBillNo); tFBillNo = new JTextField(); tFBillNo.setBounds(55, 10, 86, 20); panelBillNo.add(tFBillNo); tFBillNo.setColumns(10); JLabel lblDate = new JLabel("Date"); lblDate.setBounds(915, 10, 46, 14); panelBillNo.add(lblDate); tfDate = new JTextField(); tfDate.setBounds(967, 10, 86, 20); panelBillNo.add(tfDate); tfDate.setColumns(10); JPanel panelTableColumns = new JPanel(); panelTableColumns.setBorder(new TitledBorder(new EtchedBorder(EtchedBorder.LOWERED, null, null), "Columns", TitledBorder.LEADING, TitledBorder.TOP, null, null)); panelTableColumns.setBounds(353, 73, 788, 126); frame.getContentPane().add(panelTableColumns); panelTableColumns.setLayout(null); chckbxItems = new JCheckBox("Items"); chckbxItems.setBounds(10, 22, 97, 23); panelTableColumns.add(chckbxItems); chckbxQuantity = new JCheckBox("Quantity"); chckbxQuantity.setBounds(10, 51, 97, 23); panelTableColumns.add(chckbxQuantity); chckbxRate = new JCheckBox("Rate"); chckbxRate.setBounds(10, 80, 97, 23); panelTableColumns.add(chckbxRate); chckbxAmount = new JCheckBox("Amount"); chckbxAmount.setBounds(113, 22, 97, 23); panelTableColumns.add(chckbxAmount); chckbxTax = new JCheckBox("Tax"); chckbxTax.setBounds(113, 51, 97, 23); panelTableColumns.add(chckbxTax); chckbxDiscount = new JCheckBox("Discount"); chckbxDiscount.setBounds(113, 80, 97, 23); panelTableColumns.add(chckbxDiscount); renderTable(); ActionListener actionListener = new ActionListener() { public void actionPerformed(ActionEvent actionEvent) { renderTable(); } }; chckbxItems.addActionListener(actionListener); chckbxQuantity.addActionListener(actionListener); chckbxRate.addActionListener(actionListener); chckbxAmount.addActionListener(actionListener); chckbxTax.addActionListener(actionListener); chckbxDiscount.addActionListener(actionListener); } public void renderTable() { tableInvoice = new JTable(); tableInvoice.setRowSelectionAllowed(false); ArrayList<String> columnsList = new ArrayList<String>(); columnsList.add("S.No."); if(chckbxItems.isSelected()) columnsList.add("Items"); if(chckbxQuantity.isSelected()) columnsList.add("Quantity"); if(chckbxRate.isSelected()) columnsList.add("Rate"); if(chckbxTax.isSelected()) columnsList.add("Tax"); if(chckbxDiscount.isSelected()) columnsList.add("Discount"); if(chckbxAmount.isSelected()) columnsList.add("Amount"); String columns[]= new String[columnsList.size()]; for (int i =0 ;i<columnsList.size();i++) { columns[i]=columnsList.get(i); } JPanel panelTableInvoice = new JPanel(); panelTableInvoice.setBounds(10, 205, 1131, 250); frame.getContentPane().add(panelTableInvoice); panelTableInvoice.setLayout(null); JScrollPane scrollPaneTableInvoice = new JScrollPane(); scrollPaneTableInvoice.setBounds(0, 0, 1131, 228); panelTableInvoice.add(scrollPaneTableInvoice); DefaultTableModel defaultTableModel = new DefaultTableModel(columns,10); tableInvoice.setModel(defaultTableModel); scrollPaneTableInvoice.setViewportView(tableInvoice); } } >

I m in..

Hi All,

I found this question on some site :

Q : The sl:shoppingList and sl:item tags output a shopping list to the response and are used as follows:
11. <sl:shoppingList>
12. <sl:item name="Bread" />
13. <sl:item name="Milk" />
14. <sl:item name="Eggs" />
15. </sl:shoppingList>
The tag handler for sl:shoppingList is ShoppingListTag and the tag handler for sl:item is ItemSimpleTag. ShoppingListTag extends BodyTagSupport and ItemSimpleTag extends SimpleTagSupport.
Which is true?
A. ItemSimpleTag can find the enclosing instance of ShoppingListTag by calling getParent() and casting the result to ShoppingListTag.
B. ShoppingListTag can find the child instances of ItemSimpleTag by calling super.getChildren() and casting each to an ItemSimpleTag.
C. It is impossible for ItemSimpleTag and ShoppingListTag to find each other in a tag hierarchy because one is a Simple tag and the other is a Classic tag.
D. ShoppingListTag can find the child instances of ItemSimpleTag by calling getChildren() on the PageContext and casting each to an ItemSimpleTag.
E. ItemSimpleTag can find the enclosing instance of ShoppingListTag by calling findAncestorWithClass() on the PageContext and casting the result to
ShoppingListTag.

According to the website the answer for the above question is A.
my question is What is wrong with the option E?

It's almost a month, since then I was searching for the solution .......
Can anyone please help me in getting the answer

Thanks

Thanks Frits..

Hi Frits,
Thanks for the reply,

The stand-in stream prevents the servlet from closing the original response stream when it completes and allows the filter to modify the servlet's response.

Can you please explain me that where exactly the response stream closes and also if we use some stand-in stream why will it be not closed by the same servlet.

Thanks

Thanks Durgesh..
But if SA send response directly to the client , then what about the call stack which was created on invocation of chain.doFilter() of FA and FB and invocation of doGet()/doPost() of servlet SA.

Hi All,

Below are the lines taken from Head First Servlets and JSP

1 The filter passes the request and response to the servlet, and waits patiently for its chance to compress stuff.

2a The servlet does its thing,creating output, blissfully unaware that this very same output was supposed to be compressed.

2b The output goes back through the Container and...

2c It’s sent back to the client!Hmmm... this could be a problem.The filter was hoping to have a chance to do something to the output (compress it) before the output went to the client.

3 The call to chain.doFilter() has returned, and the filter was hoping to grab the output and and start compressing...
EXCEPT it’s too late! The output was already sent to the client! The Container doesn’t buffer the output for the filter.
By the time the filter’s own doFilter() method is at the top of the (conceptual) stack, it’s too late for the filter to affect the output.

What I didn't understand is the point no. 3 ,where it is said that "The output was already sent to the client".
Let's say we have two filters (FA and FB) and a servlet (SA).Whenever the client requests SA, the container will redirect the request first to FA and then to FB which in turn redirect it to SA (Please correct me in case).And when SA send the response to client it will first pass to FB and then FA and then to client(skeptical).
But according to the book, the response will be sent directly to client by SA but the control will be move from SA to FB and then FA.
Please Explain!!
Thanks

Thanks Peter , I have gone through the link you proposed but I m bit confused about the placement of the log4j.properties and jboss-app.xml, since in my scenario there are three war files in a ear, so the placement of log4j.properties on the root of ear will affect the logging in rest of the .war files.Can you please explain it in reference to my scenario.
myapp.ear
.+-------------a.war
.+-------------b.war
.+-------------axiscustom.war
...................+----------------META-INF
...................+----------------WEB-INF
.........................................+-------------<some xml files>
.........................................+-------------modules
.........................................+-------------lib
.........................................+-------------conf
.........................................+-------------classes
.........................................+-------------services
...........................................................+----------------x.aar
...........................................................+----------------y.aar
...........................................................+----------------myservice.aar
.................................................................................+---------------META-INF
.................................................................................+---------------services.list
.................................................................................+---------------com
......................................................................................................+-------------example
.........................................................................................................................+-----------MyClass.class//here i want to implement Logging