Do we have LinkedLists and NODEs(Circular,linear etc ) in Java

Hi ,
Please suggest me some good information to learn about NODEs in Java.....
Thanks ,
Rajesh Reddy

[Linear nodes usually make the musical sound of the drum, while circular nodes make the 'thump' sound.|http://209.85.229.132/search?q=cache:pKWk2HZ9-toJ:strikeachord.questacon.edu.au/assets/strike_a_chord_drum_dance.rtf+node+circular+linear&hl=en&ct=clnk&cd=5&gl=uk]
Or maybe you are asking about nodes as elements in a List?

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Which Mac OS X do you have installed?

Iterating performance: ArrayList, LinkedList, and Hashmap for N 1,000,000

I have seen some websites discussing about the performance of ArrayLists, LinkedLists, and Hashmaps:
http://forum.java.sun.com/thread.jspa?threadID=442985
http://java.sun.com/developer/JDCTechTips/2002/tt0910.html
http://www.javaspecialists.co.za/archive/Issue111.html
http://joust.kano.net/weblog/archives/000066.html
If I understand it right an ArrayList in general is faster for accessing a particular element in the collection and I can't find some pro's of using a LinkedList.
My question is: If I only use a large collection with more than 1 million elements for iterating from begin to end (i.e. for loop), is it faster to use a linked list or a custom linked list instead of an arraylist (or hashmap)? Since you can iterate "directly" through a (custom) linked list, which is not possible with a arraylist?
Edited by: 9squared on Nov 23, 2007 1:48 PM

Thanks for the help, I wrote some code and tested it
import java.util.ArrayList;
import java.util.List;
import java.util.LinkedList;
public class TestTemp {
     public static void main(String[] args) {
          List<Node> a = new ArrayList<Node>();
          Node b = new Node("a");
          String[] c = new String[10000000];
          Node temp = b;
          for (int i = 0; i < 10000000; i++)
               a.add(new Node("a"));
               temp.next = new Node("b");
               temp = temp.next;
               c[i] = "c";
          long tstart;
          tstart = System.currentTimeMillis();
          for (int i = 0; i < 10000000; i++)
               c[i] = "cc";
               if (i%200000 == 0)
                    System.out.println("Array " + i + ": " + (System.currentTimeMillis()-tstart));
          tstart = System.currentTimeMillis();
          temp = b;
          for (int i = 0; i < 10000000; i++)
               temp.next.text = "bb";
               temp = temp.next;
               if (i%200000 == 0)
                    System.out.println("LinkedList " + i + ": " + (System.currentTimeMillis()-tstart));
          tstart = System.currentTimeMillis();
          for (int i = 0; i < 10000000; i++)
               a.get(i).text = "aa";
               if (i%200000 == 0)
                    System.out.println("ArrayList " + i + ": " + (System.currentTimeMillis()-tstart));
public class Node {
     public String text;
     public Node next;
     public Node(String text)
          this.text = text;
}Here are some results in milliseconds, and indeed just iterating doesn't take very long
Elements     Linked     Arraylist     Array
200000     0     0     1
400000     5     13     5
600000     9     22     9
800000     14     32     12
1000000     20     42     16
1200000     25     52     19
1400000     31     63     23
1600000     37     72     26
1800000     42     82     30
2000000     47     92     33
2200000     51     101     37
2400000     56     112     40
2600000     60     123     44
2800000     65     134     47
3000000     69     143     51
3200000     73     152     55
3400000     78     162     59
3600000     84     175     63
3800000     103     185     67
4000000     108     195     70
4200000     113     207     74
4400000     117     216     78
4600000     122     225     81
4800000     127     237     85
5000000     131     247     88
5200000     136     256     92
5400000     142     266     97
5600000     147     275     101
5800000     153     286     107
6000000     159     298     113
6200000     162     307     117
6400000     167     317     121
6600000     171     326     125
6800000     175     335     128
7000000     180     346     132
7200000     184     358     136
7400000     188     368     139
7600000     193     377     143
7800000     197     388     147
8000000     201     397     150
8200000     207     410     154
8400000     212     423     157
8600000     217     432     162
8800000     222     442     167
9000000     227     452     171
9200000     231     462     175
9400000     236     473     178
9600000     242     483     182
9800000     249     495     185
10000000     257     505     189

Help with building a JTree using tree node and node renderers

Hi,
I am having a few problems with JTree's. basically I want to build JTree from a web spider. The webspide searches a website checking links and stores the current url that is being processed as a string in the variable msg. I wan to use this variable to build a JTree in a new class and then add it to my GUI. I have created a tree node class and a renderer node class, these classes are built fine. can someone point me in the direction for actually using these to build my tree in a seperate class and then displaying it in a GUI class?
*nodeRenderer.java
import javax.swing.*;
import javax.swing.tree.*;
import java.awt.*;
import java.net.*;
public class nodeRenderer extends DefaultTreeCellRenderer
                                   implements TreeCellRenderer
public static Icon icon= null;
public nodeRenderer() {
icon = new ImageIcon(getClass().getResource("icon.gif"));
public Component getTreeCellRendererComponent(
JTree tree,
Object value,
boolean sel,
boolean expanded,
boolean leaf,
int row,
boolean hasFocus) {
super.getTreeCellRendererComponent(
tree, value, sel,
expanded, leaf, row,
hasFocus);
treeNode node = (treeNode)(((DefaultMutableTreeNode)value).getUserObject());
if(icon != null) // set a custom icon
setOpenIcon(icon);
setClosedIcon(icon);
setLeafIcon(icon);
     return this;
*treeNode.java
*this is the class to represent a node
import javax.swing.*;
import javax.swing.tree.*;
import java.util.*;
import java.net.*;
* Class used to hold information about a web site that has
* been searched by the spider class
public class treeNode
*Url from the WebSpiderController Class
*that is currently being processed
public String msg;
treeNode(String urlText)
     msg = urlText;
String getUrlText()
     return msg;
//gui.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.tree.*;
import java.net.*;
import java.io.*;
import java.util.*;
public class gui extends JFrame implements Runnable
     *declare variable, boolean
     *thread, a object and a center
     *pane
     protected URL urlInput;
     protected Thread bgThread;
     protected boolean run = false;
     protected WebSpider webSpider;
     public gui()
          *create the gui here
          setTitle("Testing Tool");
     setSize(600,600);
     //add Buttons to the tool bar
     start.setText("Start");
     start.setActionCommand("Start");
     toolBar.add(start);
     ButtonListener startListener = new ButtonListener();
          start.addActionListener(startListener);
          cancel.setText("Cancel");
     cancel.setActionCommand("Cancel");
     toolBar.add(cancel);
     ButtonListener cancelListener = new ButtonListener();
          cancel.addActionListener(cancelListener);
          close.setText("Close");
     close.setActionCommand("Close");
     toolBar.add(close);
     ButtonListener closeListener = new ButtonListener();
          close.addActionListener(closeListener);
          //creat a simple form
          urlLabel.setText("Enter URL:");
          urlLabel.setBounds(100,36,288,24);
          formTab.add(urlLabel);
          url.setBounds(170,36,288,24);
          formTab.add(url);
          current.setText("Currently Processing: ");
          current.setBounds(100,80,288,24);
          formTab.add(current);
     //add scroll bars to the error messages screen and website structure
     errorPane.setAutoscrolls(true);
     errorPane.setHorizontalScrollBarPolicy(javax.swing.
     ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);
     errorPane.setVerticalScrollBarPolicy(javax.swing.
     ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
     errorPane.setOpaque(true);
     errorTab.add(errorPane);
     errorPane.setBounds(0,0,580,490);
     errorText.setEditable(false);
     errorPane.getViewport().add(errorText);
     errorText.setBounds(0,0,600,550);
     treePane.setAutoscrolls(true);
     treePane.setHorizontalScrollBarPolicy(javax.swing.
     ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);
     treePane.setVerticalScrollBarPolicy(javax.swing.
     ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
     treePane.setOpaque(true);
     treeTab.add(treePane);
     treePane.setBounds(0,0,580,490);
     treeText.setEditable(false);
     treePane.getViewport().add(treeText);
     treeText.setBounds(0,0,600,550);
     //create the tabbed window
centerPane.setBorder(new javax.swing.border.EtchedBorder());
formTab.setLayout(null);
errorTab.setLayout(null);
treeTab.setLayout(null);
centerPane.addTab("Search Parameters", formTab);
centerPane.addTab("Error Messages", errorTab);
centerPane.addTab("Website Structure", treeTab);
          //add the tool bar and tabbed pane
          getContentPane().add(toolBar, java.awt.BorderLayout.NORTH);
getContentPane().add(centerPane, java.awt.BorderLayout.CENTER);
          *create the tool bar pane, a center pane, add the buttons,
          *labels, tabs, a text field for user input here
          javax.swing.JPanel toolBar = new javax.swing.JPanel();
          javax.swing.JButton start = new javax.swing.JButton();
          javax.swing.JButton cancel = new javax.swing.JButton();
          javax.swing.JButton close = new javax.swing.JButton();
          javax.swing.JTabbedPane centerPane = new javax.swing.JTabbedPane();
          javax.swing.JPanel formTab = new javax.swing.JPanel();
          javax.swing.JLabel urlLabel = new javax.swing.JLabel();
          javax.swing.JLabel current = new javax.swing.JLabel();
          javax.swing.JTextField url = new javax.swing.JTextField();
          javax.swing.JPanel errorTab = new javax.swing.JPanel();
          javax.swing.JTextArea errorText = new javax.swing.JTextArea();
          javax.swing.JScrollPane errorPane = new javax.swing.JScrollPane();
          javax.swing.JPanel treeTab = new javax.swing.JPanel();
          javax.swing.JTextArea treeText = new javax.swing.JTextArea();
          javax.swing.JScrollPane treePane = new javax.swing.JScrollPane();
          javax.swing.JTree searchTree = new javax.swing.JTree();
          *show the gui
          public static void main(String args[])
          (new gui()).setVisible(true);
     *listen for the button presses and set the
     *boolean flag depending on which button is pressed
     class ButtonListener implements ActionListener
          public void actionPerformed(ActionEvent event)
               Object object = event.getSource();
               if (object == start)
                    run = true;
                    startActionPerformed(event);
               if (object == cancel)
                    run = false;
                    startActionPerformed(event);
               if (object == close)
                    System.exit(0);
     *this method is called when the start or
     *cancel button is pressed.
     void startActionPerformed (ActionEvent event)
          if (run == true && bgThread == null)
               bgThread = new Thread(this);
               bgThread.start();
          if (run == false && bgThread != null)
               webSpider.cancel();
     *this mehtod will start the background thred.
     *the background thread is required so that the
     *GUI is still displayed
     public void run()
          try
               webSpider = new WebSpider(this);
               webSpider.clear();
               urlInput = new URL(url.getText());
               webSpider.addURL(urlInput);
               webSpider.run();
               bgThread=null;
          catch (MalformedURLException e)
               addressError addErr = new addressError();
               addErr.addMsg = "URL ERROR - PLEASE CHECK";
               SwingUtilities.invokeLater(addErr);
          *this method is called by the web spider
          *once a url is found. Validation of navigation
          *happens here.
          public boolean urlFound(URL urlInput,URL url)
               CurrentlyProcessing pro = new CurrentlyProcessing();
          pro.msg = url.toString();
          SwingUtilities.invokeLater(pro);
          if (!testLink(url))
                    navigationError navErr = new navigationError();
                    navErr.navMsg = "Broken Link "+url+" caused on "+urlInput+"\n";
                    return false;
          if (!url.getHost().equalsIgnoreCase(urlInput.getHost()))
               return false;
          else
               return true;
          *this method is called internally to check
     *that a link works
          protected boolean testLink(URL url)
          try
               URLConnection connection = url.openConnection();
               connection.connect();
               return true;
          catch (IOException e)
               return false;
     *this method is called when an error is
     *found.
          public void URLError(URL url)
          *this method is called when an email
          *address is found
          public void emailFound(String email)
          /*this method will update any errors found inc
          *address errors and broken links
          class addressError implements Runnable
               public String addMsg;
               public void run()
                    errorText.append(addMsg);
                    current.setText("Currently Processing: "+ addMsg);
          class navigationError implements Runnable
               public String navMsg;
               public void run()
                    errorText.append(navMsg);
          *this method will update the currently
          *processing field on the GUI
          class CurrentlyProcessing implements Runnable
          public String msg;
          public void run()
               current.setText("Currently Processing: " + msg );
//webspider.java
import java.util.*;
import java.net.*;
import java.io.*;
import javax.swing.text.*;
import javax.swing.text.html.*;
import javax.swing.tree.*;
import javax.swing.*;
*this class implements the spider.
public class WebSpider extends HTMLEditorKit
     *make a collection of the URL's
     protected Collection urlErrors = new ArrayList(3);
     protected Collection urlsWaiting = new ArrayList(3);
     protected Collection urlsProcessed = new ArrayList(3);
     //report URL's to this class
     protected gui report;
     *this flag will indicate whether the process
     *is to be cancelled
     protected boolean cancel = false;
     *The constructor
     *report the urls to the wui class
     public WebSpider(gui report)
     this.report = report;
     *get the urls from the above declared
     *collections
     public Collection getUrlErrors()
     return urlErrors;
     public Collection getUrlsWaiting()
     return urlsWaiting;
     public Collection getUrlsProcessed()
     return urlsProcessed;
     * Clear all of the collections.
     public void clear()
     getUrlErrors().clear();
     getUrlsWaiting().clear();
     getUrlsProcessed().clear();
     *Set a flag that will cause the begin
     *method to return before it is done.
     public void cancel()
     cancel = true;
     *add the entered url for porcessing
     public void addURL(URL url)
     if (getUrlsWaiting().contains(url))
          return;
     if (getUrlErrors().contains(url))
          return;
     if (getUrlsProcessed().contains(url))
          return;
     /*WRITE TO LOG FILE*/
     log("Adding to workload: " + url );
     getUrlsWaiting().add(url);
     *process a url
     public void processURL(URL url)
     try
          /*WRITE TO LOGFILE*/
          log("Processing: " + url );
          // get the URL's contents
          URLConnection connection = url.openConnection();
          if ((connection.getContentType()!=null) &&
     !connection.getContentType().toLowerCase().startsWith("text/"))
          getUrlsWaiting().remove(url);
          getUrlsProcessed().add(url);
          log("Not processing because content type is: " +
     connection.getContentType() );
               return;
     // read the URL
     InputStream is = connection.getInputStream();
     Reader r = new InputStreamReader(is);
     // parse the URL
     HTMLEditorKit.Parser parse = new HTMLParse().getParser();
     parse.parse(r,new Parser(url),true);
catch (IOException e)
     getUrlsWaiting().remove(url);
     getUrlErrors().add(url);
     log("Error: " + url );
     report.URLError(url);
     return;
// mark URL as complete
getUrlsWaiting().remove(url);
getUrlsProcessed().add(url);
log("Complete: " + url );
*start the spider
public void run()
cancel = false;
while (!getUrlsWaiting().isEmpty() && !cancel)
     Object list[] = getUrlsWaiting().toArray();
     for (int i=0;(i<list.length)&&!cancel;i++)
     processURL((URL)list);
* A HTML parser callback used by this class to detect links
protected class Parser extends HTMLEditorKit.ParserCallback
protected URL urlInput;
public Parser(URL urlInput)
this.urlInput = urlInput;
public void handleSimpleTag(HTML.Tag t,MutableAttributeSet a,int pos)
String href = (String)a.getAttribute(HTML.Attribute.HREF);
if((href==null) && (t==HTML.Tag.FRAME))
href = (String)a.getAttribute(HTML.Attribute.SRC);
if (href==null)
return;
int i = href.indexOf('#');
if (i!=-1)
href = href.substring(0,i);
if (href.toLowerCase().startsWith("mailto:"))
report.emailFound(href);
return;
handleLink(urlInput,href);
public void handleStartTag(HTML.Tag t,MutableAttributeSet a,int pos)
handleSimpleTag(t,a,pos); // handle the same way
protected void handleLink(URL urlInput,String str)
try
     URL url = new URL(urlInput,str);
if (report.urlFound(urlInput,url))
addURL(url);
catch (MalformedURLException e)
log("Found malformed URL: " + str);
*log the information of the spider
public void log(String entry)
System.out.println( (new Date()) + ":" + entry );
I have a seperate class for parseing the HTML. Any help would be greatly appreciated
mrv

Hi Sorry to be a pain again,
I have re worked the gui class so it looks like this now:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.tree.*;
import javax.swing.event.*;
import java.net.*;
import java.io.*;
import java.util.*;
public class gui extends JFrame implements Runnable
     *declare variable, boolean
     *thread, a object and a center
     *pane
     protected URL urlInput;
     protected Thread bgThread;
     protected boolean run = false;
     protected WebSpider webSpider;
     public String msgInfo;
     public String brokenUrl;
     public String goodUrl;
     public String deadUrl;
     protected DefaultMutableTreeNode rootNode;
protected DefaultTreeModel treeModel;
     public gui()
          *create the gui here
          setTitle("Testing Tool");
     setSize(600,600);
     //add Buttons to the tool bar
     start.setText("Start");
     start.setActionCommand("Start");
     toolBar.add(start);
     ButtonListener startListener = new ButtonListener();
          start.addActionListener(startListener);
          cancel.setText("Cancel");
     cancel.setActionCommand("Cancel");
     toolBar.add(cancel);
     ButtonListener cancelListener = new ButtonListener();
          cancel.addActionListener(cancelListener);
          close.setText("Close");
     close.setActionCommand("Close");
     toolBar.add(close);
     ButtonListener closeListener = new ButtonListener();
          close.addActionListener(closeListener);
          //creat a simple form
          urlLabel.setText("Enter URL:");
          urlLabel.setBounds(100,36,288,24);
          formTab.add(urlLabel);
          url.setBounds(170,36,288,24);
          formTab.add(url);
          current.setText("Currently Processing: ");
          current.setBounds(100,80,288,24);
          formTab.add(current);
     //add scroll bars to the error messages screen and website structure
     errorPane.setAutoscrolls(true);
     errorPane.setHorizontalScrollBarPolicy(javax.swing.
     ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);
     errorPane.setVerticalScrollBarPolicy(javax.swing.
     ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
     errorPane.setOpaque(true);
     errorTab.add(errorPane);
     errorPane.setBounds(0,0,580,490);
     errorText.setEditable(false);
     errorPane.getViewport().add(errorText);
     errorText.setBounds(0,0,600,550);
     treePane.setAutoscrolls(true);
     treePane.setHorizontalScrollBarPolicy(javax.swing.
     ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);
     treePane.setVerticalScrollBarPolicy(javax.swing.
     ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
     treePane.setOpaque(true);
     treeTab.add(treePane);
     treePane.setBounds(0,0,580,490);
     treeText.setEditable(false);
     treePane.getViewport().add(treeText);
     treeText.setBounds(0,0,600,550);
     //JTree
     // NEW CODE
     rootNode = new DefaultMutableTreeNode("Root Node");
     treeModel = new DefaultTreeModel(rootNode);
     treeModel.addTreeModelListener(new MyTreeModelListener());
     tree = new JTree(treeModel);
     tree.setEditable(true);
     tree.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
tree.setShowsRootHandles(true);
     treeText.add(tree);
     //create the tabbed window
centerPane.setBorder(new javax.swing.border.EtchedBorder());
formTab.setLayout(null);
errorTab.setLayout(null);
treeTab.setLayout(null);
centerPane.addTab("Search Parameters", formTab);
centerPane.addTab("Error Messages", errorTab);
centerPane.addTab("Website Structure", treeTab);
          //add the tool bar and tabbed pane
          getContentPane().add(toolBar, java.awt.BorderLayout.NORTH);
getContentPane().add(centerPane, java.awt.BorderLayout.CENTER);
          *create the tool bar pane, a center pane, add the buttons,
          *labels, tabs, a text field for user input here
          javax.swing.JPanel toolBar = new javax.swing.JPanel();
          javax.swing.JButton start = new javax.swing.JButton();
          javax.swing.JButton cancel = new javax.swing.JButton();
          javax.swing.JButton close = new javax.swing.JButton();
          javax.swing.JTabbedPane centerPane = new javax.swing.JTabbedPane();
          javax.swing.JPanel formTab = new javax.swing.JPanel();
          javax.swing.JLabel urlLabel = new javax.swing.JLabel();
          javax.swing.JLabel current = new javax.swing.JLabel();
          javax.swing.JTextField url = new javax.swing.JTextField();
          javax.swing.JPanel errorTab = new javax.swing.JPanel();
          javax.swing.JTextArea errorText = new javax.swing.JTextArea();
          javax.swing.JScrollPane errorPane = new javax.swing.JScrollPane();
          javax.swing.JPanel treeTab = new javax.swing.JPanel();
          javax.swing.JTextArea treeText = new javax.swing.JTextArea();
          javax.swing.JScrollPane treePane = new javax.swing.JScrollPane();
          javax.swing.JTree tree = new javax.swing.JTree();
          *show the gui
          public static void main(String args[])
          (new gui()).setVisible(true);
     *listen for the button presses and set the
     *boolean flag depending on which button is pressed
     class ButtonListener implements ActionListener
          public void actionPerformed(ActionEvent event)
               Object object = event.getSource();
               if (object == start)
                    run = true;
                    startActionPerformed(event);
               if (object == cancel)
                    run = false;
                    startActionPerformed(event);
               if (object == close)
                    System.exit(0);
     *this method is called when the start or
     *cancel button is pressed.
     void startActionPerformed (ActionEvent event)
          if (run == true && bgThread == null)
               bgThread = new Thread(this);
               bgThread.start();
               //new line of code
               treeText.addObject(msgInfo);
          if (run == false && bgThread != null)
               webSpider.cancel();
     *this mehtod will start the background thred.
     *the background thread is required so that the
     *GUI is still displayed
     public void run()
          try
               webSpider = new WebSpider(this);
               webSpider.clear();
               urlInput = new URL(url.getText());
               webSpider.addURL(urlInput);
               webSpider.run();
               bgThread = null;
          catch (MalformedURLException e)
               addressError addErr = new addressError();
               addErr.addMsg = "URL ERROR - PLEASE CHECK";
               SwingUtilities.invokeLater(addErr);
          *this method is called by the web spider
          *once a url is found. Validation of navigation
          *happens here.
          public boolean urlFound(URL urlInput,URL url)
               CurrentlyProcessing pro = new CurrentlyProcessing();
          pro.msg = url.toString();
          SwingUtilities.invokeLater(pro);
          if (!testLink(url))
                    navigationError navErr = new navigationError();
                    navErr.navMsg = "Broken Link "+url+" caused on "+urlInput+"\n";
                    brokenUrl = url.toString();
                    return false;
          if (!url.getHost().equalsIgnoreCase(urlInput.getHost()))
               return false;
          else
               return true;
          *this method is returned if there is no link
          *on a web page, e.g. there us a dead end
          public void urlNotFound(URL urlInput)
                    deadEnd dEnd = new deadEnd();
                    dEnd.dEMsg = "No links on "+urlInput+"\n";
                    deadUrl = urlInput.toString();
          *this method is called internally to check
     *that a link works
          protected boolean testLink(URL url)
          try
               URLConnection connection = url.openConnection();
               connection.connect();
               goodUrl = url.toString();
               return true;
          catch (IOException e)
               return false;
     *this method is called when an error is
     *found.
          public void urlError(URL url)
          *this method is called when an email
          *address is found
          public void emailFound(String email)
          /*this method will update any errors found inc
          *address errors and broken links
          class addressError implements Runnable
               public String addMsg;
               public void run()
                    current.setText("Currently Processing: "+ addMsg);
                    errorText.append(addMsg);
          class navigationError implements Runnable
               public String navMsg;
               public void run()
                    errorText.append(navMsg);
          class deadEnd implements Runnable
               public String dEMsg;
               public void run()
                    errorText.append(dEMsg);
          *this method will update the currently
          *processing field on the GUI
          public class CurrentlyProcessing implements Runnable
               public String msg;
          //new line
          public String msgInfo = msg;
          public void run()
               current.setText("Currently Processing: " + msg );
     * NEW CODE
     * NEED THIS CODE SOMEWHERE
     * treeText.addObject(msgInfo);
     public DefaultMutableTreeNode addObject(Object child)
     DefaultMutableTreeNode parentNode = null;
     TreePath parentPath = tree.getSelectionPath();
     if (parentPath == null)
     parentNode = rootNode;
     else
     parentNode = (DefaultMutableTreeNode)
(parentPath.getLastPathComponent());
     return addObject(parentNode, child, true);
     public DefaultMutableTreeNode addObject(DefaultMutableTreeNode parent,
Object child)
     return addObject(parent, child, false);
     public DefaultMutableTreeNode addObject(DefaultMutableTreeNode parent,
     Object child,boolean shouldBeVisible)
     DefaultMutableTreeNode childNode = new DefaultMutableTreeNode(child);
     if (parent == null)
     parent = rootNode;
     treeModel.insertNodeInto(childNode, parent, parent.getChildCount());
     if (shouldBeVisible)
     tree.scrollPathToVisible(new TreePath(childNode.getPath()));
          return childNode;
     public class MyTreeModelListener implements TreeModelListener
          public void treeNodesChanged (TreeModelEvent e)
               DefaultMutableTreeNode node;
               node = (DefaultMutableTreeNode)
               (e.getTreePath().getLastPathComponent());
               try
                    int index = e.getChildIndices()[0];
                    node = (DefaultMutableTreeNode)
                    (node.getChildAt(index));
               catch (NullPointerException exc)
          public void treeNodesInserted(TreeModelEvent e)
          public void treeStructureChanged(TreeModelEvent e)
          public void treeNodesRemoved(TreeModelEvent e)
I beleive that this line of code is required:
treeText.addObject(msgInfo);
I have placed it where the action events start the spider, but i keep getting this error:
cannot resolve symbol
symbol : method addObject (java.lang.String)
location: class javax.swing.JTextArea
treeText.addObject(msgInfo);
Also the jtree is not showing the window that I want it to and I am not too sure why. could you have a look to see why? i think it needs a fresh pair of eyes.
Many thanks
MrV

Advanced functions,UDF's and node function

Dear all,
Can you kindly let me know about Advanced functions,UDF's and node function.Differences and Uses.
Also Let me know about the advantages,Disadvantages of Graphical,XSLT,Java,ABAP and ABAP XSLT mappings.
Thanks,
Srini

Hi,
The term Mapping means:
1. The transformation process, and/or
2. The transformation rules.
Independently from XI, you can distinguish two different mappings
Structure mappings transform entire message structures.
Value mappings transform values within messages.
Mapping Programs to Map Messages :
Message Mapping
Designed by using the graphical mapping editor of Integration Builder
Result: Generated Java Code.
Imported Archives
Import externally defined mapping programs into repository
Java mapping:
Implemented by using a specific interface
XSLT mapping:
Runtime supports XSLT processor
Java methods can be called from within a Style Sheet
ABAP Mapping
You can execute mapping programs in a sequence
The exchange infrastructure supports three types of mappings:
Message mappings that can be designed using a graphical mapping editor in the Integration Builder. As a result, Java code is generated from the graphical representation that is compiled before it can be executed on the integration server.
You can implement your own Java mapping by implementing a specific interface of the mapping API.
You can implement an XSLT mapping
For the latter two, there is no tool support in XI. It is expected that they are developed using external development tools. To make them available for the integration server, they have to be imported into the integration repository as JAR
files before (JAR: Java Archives).
Developers can even decide to combine the different mapping technologies:
Message mappings, XSLT mappings and Java mappings can be combined in a sequence by means of an interface mapping.
XSLT mappings can use java functions
Message mappings support user-defined functions that can use imported java packages of the same namespace.
In SAP XI, there is 3 types of mappings. Namely
XSLT Mapping
Java Mapping
ABAP Mapping
Here is the details of each mapping.
XSLT Mappings (ABAP Engine)
Interface descriptions are in the form of XML documents. XSL Transformation (XSLT) is a member of the XML family of languages. It describes how an XML structure is transformed into another XML structure.
Customers can develop an XSLT mapping by using the Transformation Editor of the ABAP Workbench. Such XSLT mappings are executed at runtime on the ABAP Engine of the Integration Server.
To simplify matters, this section refers to XSLT mappings of the ABAP Engine as transformation programs to differentiate them from XSLT mappings from imported archives that are executed on the J2EE Engine.
Features
XPath and <xsl:include>
You can define mappings using XSLT together with XPath. XPath is also a specification of the XML family. Using XPath you can address any node in an XML document. XSLT implements XPath expressions to select substructures of an XML document. Using templates in XSLT you can define the mapping rules for the selected substructures.
You can use the XSLT tags <xsl:include> and <xsl:import> to include predefined templates for substructures in a complete mapping definition. In this way, you can reuse mappings for data types.
Java Mapping
You can implement mapping programs in Java. To process XML documents, use Java API for XML Processing (JAXP), for example. The JAXP supports the Document Object Model (DOM) and the Simple API for XML (SAX). This gives you great flexibility for mapping definitions with Java.
Implementation Considerations
Java mapping programs are not permitted to be stateful. You are therefore not permitted to perform actions such as writing data to a database table during a Java mapping. The Integration Server cannot track such side effects. Therefore, if an attempt is made to resend a message that has not been received by the receiver, the data may inadvertently be written to the database twice in a Java mapping.
If you use JRE classes in your Java mapping programs then the same program restrictions apply as for Enterprise Java Beans (EJBs). For a detailed description of these restrictions, see the relevant EJB specification. It is important that you also refer to the information under Scope of Functions in Runtime Environment (Java Mappings).
The runtime environment for Java mappings has an mapping API. To use Java mapping, you must define a Java class that implements the Java interface com.sap.aii.mapping.api.StreamTransformation. This interface has two methods:
● public void execute(java.io.InputStream in, java.io.OutputStream out)
At runtime, the Integration Engine calls this method to execute a mapping. This method contains an input stream for the source document and an output stream for the target document as parameters. These streams are usually XML documents. You can import the substructures to be converted from the input stream and output the converted target document in the output stream.
● public void setParameter(java.util.Map param)
The Integration Engine transfers parameters to the mapping program with this method. It evaluates these parameters at runtime in the method execute(). This enables you to control the process flow of the mapping.
The transferred object that implements the Java interface java.util.Map contains seven key/value pairs as parameters. These correspond to corresponding fields in the message header. Apart from the MAPPING_TRACE constant, the value objects are of type java.lang.String. The key objects are defined in the class com.sap.aii.mapping.api.StreamTransformationConstants
ABAP Mappings
ABAP mappings are mapping programs in ABAP objects that customers can implement using the ABAP Workbench.
Features
An ABAP mapping comprises an ABAP class that implements the interface IF_MAPPING in the package SAI_MAPPING.
Exception: CX_MAPPING_FAULT
Applications can decide themselves in the method EXECUTE how to import and change the source XML document. If you want to use the XSLT processor of SAP Web AS, you can use the ABAP Workbench to develop a stylesheet directly (see XSLT Mappings (ABAP Engine)) rather than using ABAP mappings.
Runtime Constants
In ABAP mapping you can read access message header fields. To do this, an object of type IF_MAPPING_PARAM is transferred to the EXECUTE method. The interface has constants for the names of the available parameters and a method GET, which returns the respective value for the parameter name. The constants are the same as in Java mappings, although the constant MAPPING_TRACE does not exist for ABAP mappings. Instead, the trace object is transferred directly using the parameter TRACE of the method IF_MAPPING~EXECUTE
Example: Accessing a Runtime Constant
Method IF_MAPPING~EXECUTE.
Get mapping constant SENDER_SERVICE
data: l_sender_service type string.
l_sender_service = param->get( IF_MAPPING_PARAM=>SENDER_SERVICE ).
ENDMETHOD.
These r excellent websites which contain PPT & PDF documents on mapping:
Excellent PDF Document on Mapping
http://help.sap.com/bp_bpmv130/Documentation/Operation/MappingXI30.pdf
Mapping Development with the ABAP Workbench
http://help.sap.com/saphelp_nw04/helpdata/en/10/5abb2d9df242f6a62e22e027a6c382/content.htm
ABAP Mappings
http://help.sap.com/saphelp_nw04/helpdata/en/ba/e18b1a0fc14f1faf884ae50cece51b/content.htm
how to create a flat file out of an IDoc-XML by means of an ABAP mapping program and the J2EE File Adapter.
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/46759682-0401-0010-1791-bd1972bc0b8a
How to Use ABAP Mapping in XI 3.0
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/e3ead790-0201-0010-64bb-9e4d67a466b4
Hope this will help you, and don't forget to close this thread.
Regards
Aashish Sinha
PS : reward points if helpful

[Tree] item and node order ! (Recursive Node)

I made a wd4a has organizatonal structure tree. but I have some problem with the org tree.
I want to have a tree(org structure) in item(person) and node(organization) order.
Root                                            Root
|- Person 1                                    |- Head Dept
|- Person 2                                    |        |-Person 3
|-Head Dept                        ->        |        |-Person 4
|       |- Person 3                             |-Sales
|       |- Person 4                             |- Person 1
|-Sales                                          |- Person 2
( to be displayed)                                 (current displayed)
Whiat's the problem?
Although the both of them have a same contents, I really want to display in person and org order .
Plz. help.

I solved this problem myself and it makes me very so tired.
I guess that Recursive node tree have some bugs.
If a node have one recursive node and one sub-node and some kinds of attributes,
we have to make a decision on how to display and sort them(sub-node and attributes)
There is a example below as I really want to sort them.
C_Drive Folder
- file 1
- file 2
- Folder 1
- file3
- Folder 1-1
- Folder 2
Context
    |-Folder Node
    |      |-File Node
    |      |       |-File Name attribute
    |      |-Folder Name attribute
    |      |-Folder_Content             -> Recursive Node
When you meet this situation,you must implement the context nodes and
the names of context node and recursive node must be in alphabet order you want to display.
I am sorry for my crumsy writting English.

Sun Java Application Server - Domain and Node agent stop automatically

Hi,
We have installed Sun Java Application server 8.1 in a local zone on Solaris 10. The installation was successful.
A default domain (domain1) was created. We have deployed a sample application too.
The problem is that the domain and node-agent stop automatically. And need to be restarted from asadmin start-domain command.
Not sure why this problem is occurring. One solution given in Sun Java System AS 8.1 EE Troubleshooting Guide was to add these 2 lines in the /etc/inittab file to restart the domain and node-agent whenever the system re-boots.
das:3:respawn:/opt/SUNWappserver/bin/asadmin start-domain user admin passwordfile /opt/SUNWappserver/password.txt domain1
das:3:respawn:/opt/SUNWappserver/bin/asadmin start-node-agent user admin passwordfile /opt/SUNWappserver/password.txt node-agent-name
Pls help me if I can change this inittab file from the local zone and if changing this file has any implications on the other zones on Solaris 10.
Else is there any other way to resolve this problem?
Any help would be highly appreciated.
Thankyou.

One thing not clear from the post was,
* when it is going down automatically.
* Are you facing the same problem even after starting through the asadmin
* If so, Post the server.log from "domains/logs" during the starup.
If you want to bring it up with system reboot, You need to have a startup script for that in init.d and have the links to rc2/3.d.

SMQ2 entries - PI dummy activities cannot have input/output nodes

Hi
I've just completed an upgrade of APO from 30A to SCM5 SR2.
I'm trying to reconcile differencies between R/3 and SCM with the DELTAREPORT3 (/sapapo/ccr).
It keeps coming back with alot of entries for Planned Orders.
When I try and reconcile (send to APO) the APO inbound queue (SMQ2) fills up with loads of SYSFAIL entries.
Each entry has the same error "PI dummy activities cannot have input/output nodes".
Can anyone shed some light on why this could happen, and what this BASIS guy can do to resolve?
thanks,
Stephen

HI Stephen.
Would suggest that there is a problem with master data. Try and work with someone with APO/R3-PP knowledge and compare PP master data with APO PPM's or PDS's.
Pick a particular planned order that is failing and work through it methodically understanding what master data it was using when it was generated. Compare this data to the APO master data.
Very general, I know but quite often master data is at the bottom of these things, especially if you are using PP-PI.
Regards, Mark.

Instance name and node name mismatch

We have a 3 node RAC of 11.2 on Redhat Linux 2.5. At installation, instance 2 was configured to run on node 3 and instance 3 on node 2
[oracle@cchORdb3 admin]$ srvctl status database -d cchprd
Instance cchprd1 is running on node cchordb1
Instance cchprd3 is running on node cchordb2
Instance cchprd2 is running on node cchordb3Is there a way to correct this mistake without re-install the whole thing?
Edited by: user623617 on Feb 25, 2010 7:21 AM

Sorry to make you waiting. Thought the thread is frozen after the question is answered.
It works now after I stopped the instances and listeners, and then started the listeners and then instances.
I also need to change tnsnames.ora and switch the password file. The former is easy to remember but hte latter could be forget, and get ORA-01031: insufficient privileges when login to cchprd2 and cchprd3 as sysdba.
Now I login and show the parameter listener
on cchprd2
SQL> show parameter listener
NAME                                 TYPE        VALUE
listener_networks                    string
local_listener                       string      CCHPRD2
remote_listener                      string      cchORdb-rac
on cchprd2
SQL> show parameter listener
NAME                                 TYPE        VALUE
listener_networks                    string
local_listener                       string      CCHPRD3
remote_listener                      string      cchORdb-rac

PI dummy activities cannot have input/output nodes - CCR Error

Hello Experts,
While cifing process orders, queus are not moving from ECC to APO because of the following error " PI dummy activities cannot have input/output nodes". SAP reference in the error is "Message no. /SAPAPO/OM_ERROR2438". The confusing part is, suppose SKU 1000123 is being manufactured at factory B & C, there is same recipe no change in it but queues are moving for factory B and not for factory C. Please suggest how this issue can be resolved?

Hi
Please check the steps and OSS Notes mentioned in this thread
http://forums.sdn.sap.com/thread.jspa?threadID=1477003
Thanks,
Prasun

We have 2 iPad 2's. For one of them it must be very close to the router to pick up a wifi signal. We have restarted and reset it without success. Help!

We have 2 iPad 2's. For one of them it must be very close to the router to pick up a wifi signal. We have restarted and reset it without success. Using 7.1.1.

Some things to try first:
1. Turn Off your iPad. Then turn Off (disconnect power cord for 30 seconds or longer) the wireless router & then back On. Now boot your iPad. Hopefully it will see the WiFi.
2. Go to Settings>Wi-Fi and turn Off. Then while at Settings>Wi-Fi, turn back On and chose a Network.
3. Change the channel on your wireless router (Auto or Channel 6 is best). Instructions at
http://macintoshhowto.com/advanced/how-to-get-a-good-range-on-your-wireless-netw ork.html
4. Go into your router security settings and change from WEP to WPA with AES.
5. Renew IP Address: (especially if you are drooping internet connection)
    •    Launch Settings app
    •    Tap on Wi-Fi
    •    Tap on the blue arrow of the Wi-Fi network that you connect to from the list
    •    In the window that opens, tap on the Renew Lease button
6. Potential Quick Fixes When Your iPad Won’t Connect to Your Wifi Network
http://ipadinsight.com/ipad-tips-tricks/potential-quick-fixes-when-your-ipad-won t-connect-to-your-wifi-network/
~~~~~~~~~~~~~~~~~~~~~~~~~
Fix WiFi Issue for iOS 7
http://ipadnerds.com/fix-wifi-issue-ios-7/
iOS 6 Wifi Problems/Fixes
Wi-Fi Fix for iOS 6
https://discussions.apple.com/thread/4823738?tstart=240
How To: Workaround iPad Wi-Fi Issues
http://www.theipadfan.com/workaround-ipad-wifi-issues/
Another Fix For iOS 6 WiFi Problems
http://tabletcrunch.com/2012/10/27/fix-ios-6-wifi-problems-ssid/
Wifi Doesn't Connect After Waking From Sleep - Sometimes increasing screen brightness prevents the failure to reconnect after waking from sleep. According to Apple, “If brightness is at lowest level, increase it by moving the slider to the right and set auto brightness to off.”
Fix For iOS 6 WiFi Problems?
http://tabletcrunch.com/2012/09/27/fix-ios-6-wifi-problems/
Did iOS 6 Screw Your Wi-Fi? Here’s How to Fix It
http://gizmodo.com/5944761/does-ios-6-have-a-wi+fi-bug
How To Fix Wi-Fi Connectivity Issue After Upgrading To iOS 6
http://www.iphonehacks.com/2012/09/fix-wi-fi-connectivity-issue-after-upgrading- to-ios-6.html
iOS 6 iPad 3 wi-fi "connection fix" for netgear router
http://www.youtube.com/watch?v=XsWS4ha-dn0
Apple's iOS 6 Wi-Fi problems
http://www.zdnet.com/apples-ios-6-wi-fi-problems-linger-on-7000004799/
~~~~~~~~~~~~~~~~~~~~~~~
iPad: Issues connecting to Wi-Fi networks
http://support.apple.com/kb/ts3304
How to Boost Your Wi-Fi Signal
http://ipad.about.com/od/iPad_Troubleshooting/a/How-To-Boost-Your-Wi-Fi-Signal.hmL
Troubleshooting a Weak Wi-Fi Signal
http://ipad.about.com/od/iPad_Troubleshooting/a/Troubleshooting-A-Weak-Wi-Fi-Signal.htm
How to Fix a Poor Wi-Fi Signal on Your iPad
http://ipad.about.com/od/iPad_Troubleshooting/a/How-To-Fix-A-Poor-Wi-Fi-Signal-O n-Your-iPad.htm
iOS Troubleshooting Wi-Fi networks and connections http://support.apple.com/kb/TS1398
iPad: Issues connecting to Wi-Fi networks http://support.apple.com/kb/ts3304
WiFi Connecting/Troubleshooting http://www.apple.com/support/ipad/wifi/
How to Fix: My iPad Won't Connect to WiFi
http://ipad.about.com/od/iPad_Troubleshooting/ss/How-To-Fix-My-Ipad-Wont-Connect -To-Wi-Fi.htm
iOS: Connecting to the Internet http://support.apple.com/kb/HT1695
iOS: Recommended settings for Wi-Fi routers and access points http://support.apple.com/kb/HT4199
How to Quickly Fix iPad 3 Wi-Fi Reception Problems
http://osxdaily.com/2012/03/21/fix-new-ipad-3-wi-fi-reception-problems/
iPad Wi-Fi Problems: Comprehensive List of Fixes
http://appletoolbox.com/2010/04/ipad-wi-fi-problems-comprehensive-list-of-fixes/
Connect iPad to Wi-Fi (with troubleshooting info)
http://thehowto.wikidot.com/wifi-connect-ipad
10 Ways to Boost Your Wireless Signal
http://www.pcmag.com/article2/0,2817,2372811,00.asp
Fix iPad Wifi Connection and Signal Issues http://www.youtube.com/watch?v=uwWtIG5jUxE
Fix Slow WiFi Issue https://discussions.apple.com/thread/2398063?start=60&tstart=0
How to Change Your iPhone’s (iPad’s) DNS Servers
http://www.macinstruct.com/node/558
How To Fix iPhone, iPad, iPod Touch Wi-Fi Connectivity Issue http://tinyurl.com/7nvxbmz
Unable to Connect After iOS Update - saw this solution on another post.
https://discussions.apple.com/thread/4010130
Note - When troubleshooting wifi connection problems, don't hold your iPad by hand. There have been a few reports that holding the iPad by hand, seems to attenuate the wifi signal.
Some Wi-Fi losses may stem from a problematic interaction between Wi-Fi and cellular data connections. Numerous users have found that turning off Cellular Data in Settings gets their Wi-Fi working again.
You may have many apps open which can possibly cause the slowdown and possibly the loss of wifi. In iOS 4-6 double tap your Home button & at the bottom of the screen you will see the icons of all open apps. Close those you are not using by pressing on an icon until all icons wiggle - then tap the minus sign. For iOS 7 users, there’s an easy way to see which apps are open in order to close them. By double-tapping the home button on your iPhone or iPad, the new multitasking feature in iOS 7 shows full page previews of all your open apps. Simply scroll horizontally to see all your apps, and close the apps with a simple flick towards the top of the screen.
Wi-Fi or Bluetooth settings grayed out or dim
http://support.apple.com/kb/TS1559
~~~~~~~~~~~~~~~
If any of the above solutions work, please post back what solved your problem. It will help others with the same problem.
 Cheers, Tom

Reg: node and node manager

Hi to all
iam new to this forum, iam new administrator in weblogic plese help me.....
what is diference between node and node manager?
Thanks & Regardes
Ashok

Hi Ashok,
Node term usually we use for a Physical Box.
Nodemanager is a WebLogic Specific Java program which can be used to Manage a Remote Manage Server. Every Machine (Machine is a Logical name which represents a Physical box where Managed server is running) must have a NodeManager. AdminServer usually interacts with NodeManager to give start or stop Servers instructions to the Nodemanager, NodeManager program runs & resides in the same Managed Server Box...so it actually follows AdminServer's Instructions.
Nodemanager gets the Latest Configuration files from AdminServer while starting a Server in the physical box. or if AdminServer is not running at the time of starting a Managed Server then ... nodemanager uses the "msi-config.xml" file to provide to managed Servers while starting them.
Please refer to the below Post: http://weblogic-wonders.com/weblogic/2010/04/28/weblogic-clustering-in-remote-boxes/ to know what is the need of NodeManager and how to configure it.
To know in-depth about Nodemanager please refer to James Bayers....Post: http://blogs.oracle.com/jamesbayer/2010/01/weblogic_nodemanager_quick_sta.html
Thanks
Jay Sensharma

LinkedList and ArrayList Iterator speeds

Is an ArrayList Iterator hugely faster than a LinkedList Iterator?
I have swapped, for storing my 8000 dataObjects, from using an ArrayList to a LinkedList and all seems fine except that the Iterator I get is much slower (by more than 10 times slower)
I have scoured my code but I have come to the conclusion that a LinkedList is just slow
Id just like one of you to comfirm my beliefs

How odd.
According to Bruce Eckel's Thinking in Java [p.505]
(downloadable for free at
http://www.mindview.net/Books/TIJ/ ), LinkedList
should be faster than ArrayList for iteration,
insertion, and removal; and only slower for getting by
index.
I haven't done any tests of my own on it, but it makes
sense. I don't know why your LinkedList iterators
would be slower.Yes, LinkedList will be faster at inserts/deletes and slower at indexed lookups. Keep in mind that when you say myLinkedList.get(7000) the iterator has to go through 6999 objects to retrieve the 7000th object. When you do the same thing on an ArrayList it just goes directly to that index and returns it.

I have a macbook pro version 10.7.5 and my mailbox will not open at all and comes up with a quit message even though it is not open. how can i get into my account. it works on my iPhone an i have internet and all other functions working on my computer

I have a macbook pro version 10.7.5 and my mailbox will not open at all and comes up with a quit message even though it is not open. how can i get into my account. it works on my iPhone and i have internet and all other functions working on my computer

Launch the Console application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Console in the icon grid.
Step 1
Make sure the title of the Console window is All Messages. If it isn't, select All Messages from the SYSTEM LOG QUERIES menu on the left. If you don't see that menu, select
View ▹ Show Log List
from the menu bar.
Enter the name of the crashed application or process in the Filter text field. Select the messages from the time of the last crash, if any. Copy them to the Clipboard by pressing the key combination command-C. Paste into a reply to this message by pressing command-V.
When posting a log extract, be selective. In most cases, a few dozen lines are more than enough.
Please do not indiscriminately dump thousands of lines from the log into this discussion.
Important: Some private information, such as your name, may appear in the log. Anonymize before posting.
Step 2
In the Console window, look under User Diagnostic Reports (not "Diagnostic and Usage Messages") for crash reports related to the crashed process. The report name starts with the name of the process, and ends with ".crash". Select the most recent report and post the entire contents—the text, not a screenshot. I know the report is long. Please post all of it anyway.
In the interest of privacy, I suggest that, before posting, you edit out the “Anonymous UUID,” a long string of letters, numbers, and dashes in the header of the report, if it’s present (it may not be.)
Please don’t post other kinds of diagnostic report—they're very long and rarely helpful.

I have gmail and hotmail account on my macbook. In gmail I can visualize all the mailboxes but in hotmail i only can see the inbox ¿how can I visualize the rest of the mailboxes? thanks

I have gmail and hotmail account on my macbook.
In gmail I can visualize all the mailboxes but in hotmail i only can see the inbox ¿how can I visualize the rest of the mailboxes?
I have the same problem with my ipad; the solution would be the same?
thanks

Hello Sophie59
You should be able to see two different tabs when setting up the email if you go to Other > Add Mail Account. Once you enter in the email address and password, you should be at the next screen to provide more details about the email as far as incoming and outgoing servers and at the top there will be a blue section to add it in as a POP or IMAP email account. Check out the article below for further troubleshooting and emails setup options.
iOS: Troubleshooting Mail
http://support.apple.com/kb/ts3899
iOS: Adding an email account
http://support.apple.com/kb/ht4810
Regards,
-Norm G.

Do we have LinkedLists and NODEs(Circular,linear etc ) in Java

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