Dealing w/ User Input and Multiple Objects

I am trying to write a simple interface where a user inputs his/her name and id and then a Patron object is created based on their given input. I am having trouble when there are multiple patrons. My problem is referencing the different Patron objects with the different names and id's. I was wondering how I could maybe filter through the objects to retrieve the one that I want. He is some code.
With this works for me because each object has a unique name:
lib.addBook(book);
                    lib.addBook(book2);
                    lib.addPatron(patron);
                    lib.addPatron(patron2);
This does not work though because each patron object being added has the same name:
System.out.print("\nName: ");
                    name = br.readLine();
                    System.out.print("ID: ");
                    id = br.readLine();
                    pat = new Patron(name, id);
                    lib.addPatron(pat);
If I did not explain my problem well please let me know. Thanks.

Without any interface I can create my objects like this giving them all unique names, such as patron1, patron2, patron3, and so on.
          lib.addBook(book);
                    lib.addBook(book2);
                    lib.addPatron(patron);
                    lib.addPatron(patron2);
With and interface I am having trouble finding a way to give each object a unique name. This is my code for adding a new patron to the Hashset.
System.out.print("\nName: ");
                    name = br.readLine();
                    System.out.print("ID: ");
                    id = br.readLine();
                    pat = new Patron(name, id);
                    lib.addPatron(pat);
How can I reference a specific object in the Hashset? This is my problem. Thanks.

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Hi,
This forum is exclusively for Sun Java Studio Creator.
You may need to post this question at:
http://forum.java.sun.com/forum.jspa?forumID=45
Thanks,
Creator Team.

What's the difference between an audio INPUT and AUX object?

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revDave:
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"catching" a prompt for user input and answering it through zenity?

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Last edited by falconheart (2011-01-16 22:37:25)

The easier way to do this is to collect the info with zenity first, then pass it on the command line. If the program insists on prompting, then you could try feeding it the info with redirection if it accepts it from stdin. For example
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Thanks.

Hi
Just take a look at thread's example
http://forums.ni.com/t5/NI-TestStand/TestStand-Message-Popup/m-p/1792424/highlight/true#M35397
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=s=i=g=n=a=t=u=r=e= Click on the Star and see what happens :-) =s=i=g=n=a=t=u=r=e=

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Hi All,
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Hi,
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For ex
create or replace procedure p1(category_in in varchar2)
IS
BEGIN
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prcdr2()
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end if;
exception
/***write the exception logic ***/
end p1;
Begin
p1('&cat');
end;Regards,
Achyut K
Edited by: Achyut K on Aug 6, 2010 5:20 AM

URGENT!.....accepting user input and string conversion

I have a problem with a text-based menu I am trying to create for a Shape class with rectangle, circle, etc... subclasses below it...here is a code clip
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Try this:
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User inputs and simple anim.

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Sorry, now that I have gotten a better look at your run() method. You need to replace what you have with the code that I gave you in the previous post. If you run a for loop that is inside the thread, you will change Y from being at the center to Y == 10 in one thread iteration. This is much too fast for what you want to do.
Don't forget that the thread is executing something like 1000 times every second (depending on how you set it up and the speed of your machine). So if you put a for loop inside the thread you are running the for loop about 1000 times a second when all you meant to do is run through one time.

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Hi there,
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I know about the note trick but I am not quite happy with this one. I would like another solution if there is any.
Thanks !!

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JET

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Last edited by stevepa (2012-02-28 17:31:56)

The above solution is good okay for a general shell script, bash has a feature for what you want though. (see below)
If however the content of the variable is bigger (multiple lines, or a really LONG line you don't want to have to retype), you have 2 options:
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Hello Experts
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Hi,
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Hi,
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IS
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then
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elsif(category_in='N') then
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exception
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end p1;
Begin
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end;Regards,
Achyut K
Edited by: Achyut K on Aug 6, 2010 5:20 AM

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Hi
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import java.awt.event.*;
import java.awt.*;
import javax.swing.event.*;
import javax.swing.tree.*;
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import DynamicTreeNode.*;
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 * reference to the icon object assigned to the node.
 * This is the only place, where the class Node, or its methods are called explicitely.
 protected class MyRenderer extends DefaultTreeCellRenderer {
 /** The constructor of the class.
 * - sets folders icons (opened, closed folder)
 public MyRenderer() {
 //setLeafIcon(new ImageIcon("images/middle.gif")); //for leaves' icon, all at once!
 setOpenIcon(new ImageIcon("images/folder_open.gif"));
 setClosedIcon(new ImageIcon("images/folder_close.gif"));
 /** This overridden method gets the user-specified icon for leaf nodes. */
 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);
 if (leaf)
 //workaround: test if icon not eq. null
 ImageIcon ic = getRightIcon(value);
 if (ic == null) return this;
 else
 setIcon(ic);
 return this;
 }//overridden: getTreeCellRendererComponent
 private ImageIcon getRightIcon(Object value) {
 DefaultMutableTreeNode node = (DefaultMutableTreeNode)value;
 try{
 Node node_object = (Node)(node.getUserObject());
 return (node_object.getIcon());
 catch (Exception e) { return null; }
 }// ImageIcon getRightIcon(Object value)
}//class MyRenderer
//-------------OutlookClient methods-----------------------------------------
 private void assignListeners(){
 dyn_tree.addTreeSelectionListener(new TreeSelectionListener() {
 public void valueChanged(TreeSelectionEvent e) {
 DefaultMutableTreeNode node = (DefaultMutableTreeNode)dyn_tree.getLastSelectedPathComponent();
 if (node == null) return;
 if (node.isLeaf()) { txt.setText(node.toString()); }
 }//assignListeners()
 private void createLayout(){
 leftArea.setLayout(new BoxLayout(leftArea,BoxLayout.Y_AXIS));
 rightArea.setLayout(new BoxLayout(rightArea,BoxLayout.Y_AXIS));
 //left.setMinimumSize(new Dimension(120,200));
 right.setMinimumSize(new Dimension(50,50));
 //rightArea.add(b1);
 //rightArea.add(b2);
 rightArea.add(txt);
 //leftArea.add(tree); ... not nice (why?)
 left = new JScrollPane (dyn_tree, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
 left.setMinimumSize(new Dimension(180,200));
 sp.setLeftComponent(left);
 }//createLayout()
 private void createMenu(){
 ButtonGroup group = new ButtonGroup();
 JRadioButtonMenuItem rbMenuItem;
 closeAppItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F3, ActionEvent.ALT_MASK));
 closeAppItem.getAccessibleContext().setAccessibleDescription("Closes application");
 closeAppItem.addActionListener( new ActionListener() {
 public void actionPerformed(ActionEvent e) {System.exit(0);}
 othersMenu.setMnemonic(KeyEvent.VK_O);
 othersMenu.getAccessibleContext().setAccessibleDescription("System settings&Others");
 rbMenuItem = new JRadioButtonMenuItem("Java");
 rbMenuItem.setSelected(true);
 rbMenuItem.setMnemonic(KeyEvent.VK_J);
 group.add(rbMenuItem);
 rbMenuItem.addActionListener(new ActionListener() {
 public void actionPerformed(ActionEvent e) {setPLAF(UIManager.getCrossPlatformLookAndFeelClassName( ) );}
 look_and_feelMenu.add(rbMenuItem);
 rbMenuItem = new JRadioButtonMenuItem("Windows");
 rbMenuItem.setMnemonic(KeyEvent.VK_W);
 group.add(rbMenuItem);
 rbMenuItem.addActionListener(new ActionListener() {
 public void actionPerformed(ActionEvent e) {setPLAF("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");}
 look_and_feelMenu.add(rbMenuItem);
 windowsLookAndFeelItem = rbMenuItem;
 look_and_feelMenu.setMnemonic(KeyEvent.VK_L);
 look_and_feelMenu.getAccessibleContext().setAccessibleDescription("Look&Feel");
 JMenuItem aboutItem = new JMenuItem ("About");
 aboutItem.addActionListener(new ActionListener() {
 public void actionPerformed(ActionEvent e) {
 AboutDialog ad = new AboutDialog();
 ad.show();
 othersMenu.add(look_and_feelMenu);
 othersMenu.addSeparator();
 othersMenu.add(aboutItem);
 othersMenu.addSeparator();
 othersMenu.add(closeAppItem);
 mainOutlookMenu.setMnemonic(KeyEvent.VK_A);
 mainOutlookMenu.getAccessibleContext().setAccessibleDescription("Outlook activities");
 menuBar.add(mainOutlookMenu);
 menuBar.add(othersMenu);
 mailMenu.setMnemonic(KeyEvent.VK_M);
 mailMenu.getAccessibleContext().setAccessibleDescription("Mail activities");
 chatMenu.setMnemonic(KeyEvent.VK_C);
 chatMenu.getAccessibleContext().setAccessibleDescription("Chat");
 chatMenu.setEnabled(false);
 mainOutlookMenu.add(mailMenu);
 mainOutlookMenu.addSeparator();
 mainOutlookMenu.add(chatMenu);
 //mailMenu.add(newMail);
 //mailMenu.add(reply); //class Action has problems to catch the accelerator keys
 newMailItem.setMnemonic(KeyEvent.VK_N);
 replyItem.setMnemonic(KeyEvent.VK_R);
 mailMenu.add(newMailItem);
 mailMenu.add(replyItem);
 newMailItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N, ActionEvent.CTRL_MASK));
 replyItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_R, ActionEvent.ALT_MASK));
 //newMail.putValue(Action.NAME, "New mail");
 //newMail.putValue(Action.SHORT_DESCRIPTION, "New mail");
 //newMail.putValue(Action.LONG_DESCRIPTION, "New mail");
 //newMail.putValue(Action.MNEMONIC_KEY, "N"); //cast an exception. why?
 //newMail.putValue(Action.ACCELERATOR_KEY, KeyStroke.getKeyStroke(KeyEvent.VK_N, ActionEvent.CTRL_MASK));
 setJMenuBar(menuBar);
 }//createMenu()
 private void createToolBar(){
 //toolBar.add(newMail);
 //toolBar.add(reply); //does not provide texts and mnemonics
 tb1.setMnemonic(KeyEvent.VK_N);
 tb2.setMnemonic(KeyEvent.VK_R);
 toolBar.add(tb1);
 toolBar.add(tb2);
 }//createToolBar()
 private void createNodes(DefaultMutableTreeNode topNode){
 //new for dynamic processing
 DefaultMutableTreeNode
 parentNode = null,
 leaveNode = null;
 parentNode = dyn_tree.addObject(null,new Node ("MailFolders", false, true));
 dyn_tree.addObject(parentNode,new Node ("Inbox","images/InboxIcon.gif", false, false));
 dyn_tree.addObject(parentNode,new Node ("Outbox","images/OutboxIcon.gif", false, false));
 dyn_tree.addObject(parentNode,new Node ("Sent","images/SentIcon.gif", false, false));
 dyn_tree.addObject(parentNode,new Node ("Deleted","images/DeletedIcon.gif", false, false));
 //leaveNode.setEnabled(false); //TODO: disable "Chat"node
 dyn_tree.addObject(null,new Node ("Chat", false, false));
 }//createcreateNodes(DefaultMutableTreeNode)
 private void setTreeSettings(){
 //one selection at one time
 dyn_tree.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
 //connect nodes with a thin line - Java style only
 dyn_tree.putClientProperty("JTree.lineStyle","Angled");
 //collapse the root's children first
 //tree.setShowsRootHandles(false);
 //icon adjustment
 MyRenderer MyRen = new MyRenderer();
 dyn_tree.setCellRenderer(MyRen);
 //modifiable tree - by double click - allows modifying of nodes' names
 // but unfortunately also restores original icons
 //tree.setEditable(true);
 }//setTreeSettings()
 private boolean setPLAF(String LookAndFeelName){
 try{
 UIManager.setLookAndFeel(LookAndFeelName);
 SwingUtilities.updateComponentTreeUI(this);
 return true;
 } catch (Exception e) {
 //e.printStackTrace(System.err);
 return false;
 }//setPLAF(String LookAndFeelName)
 private void trytosetLookAndFeel(){
 if (setPLAF("com.sun.java.swing.plaf.windows.WindowsLookAndFeel"))
 windowsLookAndFeelItem.setSelected(true);
 }//trytosetLookAndFeel()
 /** The applet's init().
 * Calls methods to construct all visible objects.
 * Apart from that it also assigns the renderer to the tree.
 public void init(){
 sp.setOneTouchExpandable(true);
 //sp.setDividerLocation(150); - system puts the value to optimize the left part
 sp.setPreferredSize(new Dimension(450,200));
 Container cp = getContentPane();
 cp.setLayout(new FlowLayout());
 createLayout();
 createMenu();
 createToolBar();
 createNodes(topNode);
 setTreeSettings();
 //createPopupMenu();
 assignListeners();
 cp.add(toolBar);
 cp.add(sp);
 trytosetLookAndFeel();
 }//init()
 /** If called as an application.
 * The desired Windows Look&Feel is re-set again, when the applet is running. Otherwise, it in an application
 * it tends not to work correctly.
 public static void main(String[] args) {
 OutlookClient theApplet;
 BruceEckel.Console.run(theApplet=new OutlookClient(), 500, 300);
 theApplet.trytosetLookAndFeel();
 }//main(String[])
}///:~Take a look namely at createNodes
Hope it helps.

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