Impementing First GUI into Current App

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Re: Impementing First GUI into Current App

 
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  #11
Jul 23rd, 2007
I did have concerns about the toString, but again fall into unfamiliar territory with that function.
I do understand what you say about the list being empty, which goes back to an overall question about how the GUI pulls information, and from where.
I think I am way over my head here, I think I probably need to scrap the JLIST and just go back to the original plan and insert everything into a new gui class that uses my Compactdisk and Cdwartist classes.
Right now I am trying to build on a foundation I have not properly laid yet.
1st thing I need to do is get a QUI screen with some fields in it where I can enter information into my existing array.
Then I will worry about sorting, adding and all that other stuff.
Would you suggest I take everything from Inventory and just re-write it into my new class, so that I do not use Inventory anymore?
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I'm no ones son, unforgiven.
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Re: Impementing First GUI into Current App

 
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  #12
Jul 23rd, 2007
You could, if you feel that is easier for you to logically work with. JList has it's own container (the list model) that you can put CDs into. The part from your loop in inventory will largely be replaced by code in a button that creates a new CD, reads the info from your text fields and sets the properties on the CD, and then adds it to the list model.
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Re: Impementing First GUI into Current App

 
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  #13
Jul 23rd, 2007
That is a lot of my problem right there, at this point I am not even sure what I should do. This is my first attempt at GUI so I wanted to stay as basic as possible, and keep as much of my existing code as possible because I understand it as it is (for the most part.)
I have never used JList either, so between that and GUI both at once I am just getting confused as to what is changing by implimenting one, and what changes because of the other.
I am looking at the code I have attempted today, some for GUI frames, some for buttons, some for JList ... all of it new, and none of it clear.
I think I am going to delete everything I have tried up to this point, and just start over. :o(
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Re: Impementing First GUI into Current App

 
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  #14
Jul 23rd, 2007
Yes, GUI code can be a little complex to jump into. You just have to start simple and keep at it. Perhaps this demo will help. It's just a tiny form I knocked up that let's you add a CD with artist and title to a JList.
Java Syntax (Toggle Plain Text) 
  1. import javax.swing.DefaultListModel;
  2.  
  3. public class ListDemo extends javax.swing.JFrame {
  4.  
  5.     private javax.swing.JButton btnAdd;
  6.     private javax.swing.JScrollPane jScrollPane1;
  7.     private javax.swing.JLabel lblArtist;
  8.     private javax.swing.JLabel lblTitle;
  9.     private javax.swing.JList lstInventory;
  10.     private javax.swing.JTextField txtArtist;
  11.     private javax.swing.JTextField txtTitle;
  12.  
  13.     private DefaultListModel listModel;
  14.  
  15.  
  16.     public ListDemo() {
  17.         initComponents();
  18.     }
  19.  
  20.     private void initComponents() {
  21.         lblArtist = new javax.swing.JLabel();
  22.         txtArtist = new javax.swing.JTextField();
  23.         lblTitle = new javax.swing.JLabel();
  24.         txtTitle = new javax.swing.JTextField();
  25.         btnAdd = new javax.swing.JButton();
  26.         jScrollPane1 = new javax.swing.JScrollPane();
  27.         lstInventory = new javax.swing.JList();
  28.  
  29.         getContentPane().setLayout(new java.awt.FlowLayout());
  30.  
  31.         setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
  32.  
  33.         lblArtist.setText("Artist");
  34.         getContentPane().add(lblArtist);
  35.  
  36.         txtArtist.setMinimumSize(new java.awt.Dimension(75, 19));
  37.         txtArtist.setPreferredSize(new java.awt.Dimension(75, 19));
  38.         getContentPane().add(txtArtist);
  39.  
  40.         lblTitle.setText("Title");
  41.         getContentPane().add(lblTitle);
  42.  
  43.         txtTitle.setMinimumSize(new java.awt.Dimension(75, 19));
  44.         txtTitle.setPreferredSize(new java.awt.Dimension(75, 19));
  45.         getContentPane().add(txtTitle);
  46.  
  47.         btnAdd.setText("Add");
  48.         btnAdd.addActionListener(new java.awt.event.ActionListener() {
  49.             public void actionPerformed(java.awt.event.ActionEvent evt) {
  50.                 btnAddActionPerformed(evt);
  51.             }
  52.         });
  53.  
  54.         getContentPane().add(btnAdd);
  55.  
  56.         listModel = new DefaultListModel();
  57.         lstInventory.setModel(listModel);        
  58.  
  59.         jScrollPane1.setViewportView(lstInventory);
  60.  
  61.         getContentPane().add(jScrollPane1);
  62.  
  63.         pack();
  64.     }
  65.  
  66.     private void btnAddActionPerformed(java.awt.event.ActionEvent evt) {                                       
  67.         // Create cd and set title
  68.         CD cd = new CD(txtArtist.getText());
  69.         cd.setTitle(txtTitle.getText());
  70.  
  71.         // Add the cd to list
  72.         listModel.addElement(cd);
  73.  
  74.         // Clear the text fields
  75.         txtArtist.setText(null);
  76.         txtTitle.setText(null);
  77.     }                                      
  78.  
  79.     public static void main(String args[]) {
  80.         java.awt.EventQueue.invokeLater(new Runnable() {
  81.             public void run() {
  82.                 new ListDemo().setVisible(true);
  83.             }
  84.         });
  85.     }
  86.  
  87.     /** Small CD class to hold our data */
  88.     class CD {
  89.         private String artist;
  90.         private String title;
  91.  
  92.         public CD(String artist){
  93.             this.artist = artist;
  94.         }
  95.  
  96.         public void setTitle(String title){
  97.             this.title = title;
  98.         }
  99.  
  100.         public String toString(){
  101.             return artist + " - " + title;
  102.         }
  103.     }
  104.  
  105.  
  106. }
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Re: Impementing First GUI into Current App

 
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  #15
Jul 23rd, 2007
I am going to see what I can do with that and get back with you tomorrow.
I appreciate your patience.
I never drew first, but I drew first blood.
I'm no ones son, unforgiven.
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Re: Impementing First GUI into Current App

 
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  #16
Jul 23rd, 2007
Just so you know I was not just sitting around waiting on code, here is what I had come up with over the afternoon ... looking at what you hve done I think I was at least headed in the right direction. I was rewriting my entire Inventory class from the ground up. I am not exactly sure where I was going with it, but I kept the idea stream flowing and this is where it took me. :o)

Java Syntax (Toggle Plain Text) 
  1. import java.util.*;
  2. import java.awt.*;
  3. import java.awt.event.*;
  4. import javax.swing.*;
  5.  
  6. public class Inventory2 extends JFrame
  7. {
  8. 	private JLabel cdNameLabel; // name label 
  9. 	private JLabel artistLabel; // item number label 
  10. 	private JLabel nstockLabel; // units in stock label 
  11. 	private JLabel priceLabel; // price each label 
  12. 	private JLabel itemLabel; // item number label 
  13. 	private JLabel valueLabel; // value of that item label 
  14. 	private JLabel rstkLabel; // cost to restock label 
  15. 	private JLabel totalLabel; // total value of inventory label 
  16. 	private JTextField cdNameField; // name display 
  17. 	private JTextField artistField; // artist display 
  18. 	private JFormattedTextField nstockField; // units in stock display 
  19. 	private JFormattedTextField priceField; // price each display 
  20. 	private JTextField itemField; // item number display 
  21. 	private JFormattedTextField valueField; // value of that item display 
  22. 	private JFormattedTextField rstkField; // cost to restock display 
  23. 	private NumberFormat nstockFormat; // format field and parse numbers 
  24. 	private NumberFormat priceFormat; // format field and parse numbers 
  25. 	private NumberFormat valueFormat; // format field and parse numbers 
  26. 	private NumberFormat rstkFormat; // format field and parse numbers 
  27. 	private JButton firstBtn; // first button 
  28. 	private JButton prevBtn; // previous button 
  29. 	private JButton nextBtn; // next button 
  30. 	private JButton lastBtn; // last button 
  31. 	private JPanel buttonJPanel; // JPanle to hold buttons 
  32. 	private JPanel fieldJPanel; // JPanel to hold labels and displays 
  33. 	private JPanel fontJPanel; // JPanel to display logo 
  34. 	private int currCD; // current product display to use for button action 
  35. 	private int i; // iterator 
  36. 	private double total = 0; // variable for total inventory 
  37.  
  38. 	public Inventory2() // create class and method to perform GUI build 
  39. 	{ 
  40. 		initComponents(); 
  41. 	} 
  42.  
  43. 	private void initComponents() 
  44. 	{ 
  45. 		// create label names 
  46. 		cdNameLabel = new JLabel("CD Name:"); 
  47. 		artistLabel = new JLabel("Artist:");
  48. 		nstockLabel = new JLabel("In Stock:"); 
  49. 		priceLabel = new JLabel("Each Item Cost:"); 
  50. 		itemLabel = new JLabel("Item Number:"); 
  51. 		valueLabel = new JLabel("Value of Item Inventory:"); 
  52. 		rstkLabel = new JLabel("Cost to Re-Stock Item:"); 
  53. 		totalLabel = new JLabel("Total Value of Inventory:$"+total); 
  54.  
  55. 		// create button names 
  56. 		firstBtn = new JButton("First"); 
  57. 		prevBtn = new JButton("Previous"); 
  58. 		nextBtn = new JButton("Next"); 
  59. 		lastBtn = new JButton("Last"); 
  60.  
  61. 		// create textFields and set uneditable 
  62. 		cdNameField = new JTextField(15); 
  63. 		cdNameField.setEditable(false); 
  64.  
  65. 		artistField = new JTextField(15); 
  66. 		artistField.setEditable(false); 
  67. 		; 
  68. 		nstockField = new JFormattedTextField(nstockFormat); 
  69. 		nstockField.setEditable(false); 
  70. 		nstockField.setColumns(10); 
  71.  
  72. 		priceField = new JFormattedTextField(priceFormat); 
  73. 		priceField.setEditable(false); 
  74. 		priceField.setColumns(10); 
  75.  
  76. 		itemField = new JTextField(15); 
  77. 		itemField.setEditable(false); 
  78.  
  79. 		valueField = new JFormattedTextField(valueFormat); 
  80. 		valueField.setEditable(false); 
  81. 		valueField.setColumns(10); 
  82.  
  83. 		rstkField = new JFormattedTextField(rstkFormat); 
  84. 		rstkField.setEditable(false); 
  85. 		rstkField.setColumns(10);
  86.  
  87. 		// add buttons to panel 
  88. 		JPanel buttons = new JPanel(); // set up panel 
  89. 		buttons.setLayout( new GridLayout(1, 4)); //set layout 
  90. 		// add buttons to buttons 
  91. 		buttons.add(firstBtn); 
  92. 		buttons.add(prevBtn); 
  93. 		buttons.add(nextBtn); 
  94. 		buttons.add(lastBtn);
  95.  
  96.  
  97. 		// create cd Array 
  98. 		CdwArtist[] cds = new CdwArtist[100];
  99.  
  100.  		for(int i = 0; i < cds.length && !nameInput.equalsIgnoreCase("STOP"); i++)
  101. 		cds[i] = new CdwArtist();
  102. 	  	cds[i].setName(nameInput);
  103. 		//total += cdProduct[currCD].calcValue(); // calculate total inventory cost 
  104.  
  105. 		// add values to textFields 
  106. 		cdNameField.setText(cds[i].getProdName()); 
  107. 		artistField.setValue(new Integer(cds[i].getArtist()));
  108. 		nstockField.setValue(new Integer(cds[i].getUnits())); 
  109. 		priceField.setValue("$"+new Double(cds[i].getPrice())); 
  110. 		itemField.setText(cds[i].getFeature()); 
  111. 		valueField.setValue("$"+new Double(cds[i].calcValue())); 
  112. 		rstkField.setValue("$"+new Double(cds[i].calcValueRstk()))
I never drew first, but I drew first blood.
I'm no ones son, unforgiven.
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Re: Impementing First GUI into Current App

 
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  #17
Jul 24th, 2007
I did not understand it at first, but after sitting down and comparing it to what I was writing I could see what I was trying to do, and it cleared up in my head.
Then I started coding, and as I created everything I could see the logic behind what was being built, how the buttons, fields, and JList all work together.
I do have a few questions of course, if you have a moment,
Here is everything, from your original work, to what I have added:
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import java.text.*;
import java.lang.*;

public class Inventory2 extends JFrame
{
	private JLabel cdNameLabel; // name label 
	private JLabel artistLabel; // item number label 
	private JLabel nstockLabel; // units in stock label 
	private JLabel priceLabel; // price each label 
	private JLabel itemLabel; // item number label 
	private JLabel valueLabel; // value of that item label 
	private JLabel rstkLabel; // cost to restock label 
	private JLabel totalLabel; // total value of inventory label 
	private JTextField cdNameField; // name display 
	private JTextField artistField; // artist display 
	private JFormattedTextField nstockField; // units in stock display 
	private JFormattedTextField priceField; // price each display 
	private JTextField itemField; // item number display 
	private JFormattedTextField valueField; // value of that item display 
	private JFormattedTextField rstkField; // cost to restock display
	private JFormattedTextField totalField; // value of all inventory combine 
	private NumberFormat nstockFormat; // format field and parse numbers 
	private NumberFormat priceFormat; // format field and parse numbers 
	private NumberFormat valueFormat; // format field and parse numbers 
	private NumberFormat rstkFormat; // format field and parse numbers 
	private JButton btnAdd; // first button 
	private JButton btnPrev; // previous button 
	private JButton btnNext; // next button 
	private JButton btnDel; // last button 
	//private JPanel buttonJPanel; // JPanle to hold buttons 
	//private JPanel fieldJPanel; // JPanel to hold labels and displays 
	//private JPanel fontJPanel; // JPanel to display logo 
	private int currCD; // current product display to use for button action 
	private int i; // iterator 
	private double total = 0; // variable for total inventory 
	private JList Inventorylist; // JList to take place of old array
	private DefaultListModel listModel;
	private JScrollPane jScrollPanel;  

	public Inventory2() // create class and method to perform GUI build 
	{ 
		initComponents(); 
	} 

	private void initComponents() 
	{ 
		// create label names 
		cdNameLabel = new JLabel("CD Name:"); 
		artistLabel = new JLabel("Artist:");
		nstockLabel = new JLabel("In Stock:"); 
		priceLabel = new JLabel("Each Item Cost:"); 
		itemLabel = new JLabel("Item Number:"); 
		valueLabel = new JLabel("Value of Item Inventory:"); 
		rstkLabel = new JLabel("Cost to Re-Stock Item:"); 
		totalLabel = new JLabel("Total Value of Inventory:$"+total); 
		
		// JList
		jScrollPanel = new JScrollPane();
		Inventorylist = new JList(); 
		
		// buttons 
		btnAdd = new JButton(); 
		btnNext = new JButton(); 
		btnPrev = new JButton(); 
		btnDel = new JButton(); 
		
		getContentPane().setLayout(new FlowLayout());
		
		setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

		// place textFields and labels
		
		//artist
		artistLabel.setText("Artist"); 
		getContentPane().add(artistLabel); 

		artistField.setMinimumSize(new Dimension(75,19)); 
		artistField.setPreferredSize(new Dimension(75,19));
		getContentPane().add(artistField); 
		
		// cd name
		cdNameLabel.setText("CD Name"); 
		getContentPane().add(cdNameLabel); 

		cdNameField.setMinimumSize(new Dimension(75,19)); 
		cdNameField.setPreferredSize(new Dimension(75,19));
		getContentPane().add(cdNameField);
		
		// copies in stock
		nstockLabel.setText("Copies In Stock"); 
		getContentPane().add(nstockLabel); 

		nstockField.setMinimumSize(new Dimension(75,19)); 
		nstockField.setPreferredSize(new Dimension(75,19));
		getContentPane().add(nstockField); 
		
		//price of cd
		priceLabel.setText("Price"); 
		getContentPane().add(priceLabel); 

		priceField.setMinimumSize(new Dimension(75,19)); 
		priceField.setPreferredSize(new Dimension(75,19));
		getContentPane().add(priceField); 
		
		//item number of cd
		itemLabel.setText("Item Number"); 
		getContentPane().add(itemLabel); 

		itemField.setMinimumSize(new Dimension(75,19)); 
		itemField.setPreferredSize(new Dimension(75,19));
		getContentPane().add(itemField);; 
		
		// value of individual cd in stock
		valueLabel.setText("Value"); 
		getContentPane().add(valueLabel); 

		valueField.setMinimumSize(new Dimension(75,19)); 
		valueField.setPreferredSize(new Dimension(75,19));
		getContentPane().add(valueField); 
		
		// restocking fee
		rstkLabel.setText("Restock Fee"); 
		getContentPane().add(rstkLabel); 

		rstkField.setMinimumSize(new Dimension(75,19)); 
		rstkField.setPreferredSize(new Dimension(75,19));
		getContentPane().add(rstkField);
		
		// total value of inventory
		totalLabel.setText("Total Inventory Value"); 
		getContentPane().add(totalLabel); 

		totalField.setMinimumSize(new Dimension(75,19)); 
		totalField.setPreferredSize(new Dimension(75,19));
		getContentPane().add(totalField);	
		
		// add buttons
		//ADD
		btnAdd.setText("Add");
		  
 
  
 Java Syntax (Toggle Plain Text) 
 
 
 
  1. btnAdd.addActionListener(new ActionListener()
  
 
		{
			public void actionPerformed(ActionEvent evt)
			{
				btnAddActionPerformed(evt);
			}
		});
		getContentPane().add(btnAdd);
		 
		// PREVIOUS
		btnPrev.setText("Previous");
		  
 
  
 Java Syntax (Toggle Plain Text) 
 
 
 
  1. btnPrev.addActionListener(new ActionListener()
  
 
		{
			public void actionPerformed(ActionEvent evt)
			{
				btnAddActionPerformed(evt);
			}
		});
		getContentPane().add(btnPrev);
		
		// NEXT
		btnNext.setText("Next");		  
 
  
 Java Syntax (Toggle Plain Text) 
 
 
 
  1. btnNext.addActionListener(new ActionListener()
  
 
		{
			public void actionPerformed(ActionEvent evt)
			{
				btnAddActionPerformed(evt);
			}
		});
		getContentPane().add(btnNext);
				
		// DELETE
		btnDel.setText("Delete");
		  
 
  
 Java Syntax (Toggle Plain Text) 
 
 
 
  1. btnDel.addActionListener(new ActionListener()
  
 
		{
			public void actionPerformed(ActionEvent evt)
			{
				btnAddActionPerformed(evt);
			}
		});
		getContentPane().add(btnDel);
		
		// new Jlist model
		listModel = new DefaultListModel();
		Inventorylist.setModel(listModel);
		
		jScrollPanel.setViewportView(Inventorylist);
		
		getContentPane().add(jScrollPanel);
		
		pack();
	}// close
		
		private void btnAddActionPerformed(ActionEvent evt)
		{
			// Create cd to add
			CD cd = new CD(artistField.getText());
			cd.setcdName(cdNameField.getText());	
			cd.setitem(itemField.getText());
			cd.setnstock(nstockField.getText());
			cd.setprice(priceField.getText());
			cd.setvalue(valueField.getText());
			cd.settotal(totalField.getText());
			cd.setrstk(rstkField.getText());	
			
			// Add cd to list
			listModel.addElement(cd);
			
			// Clear the text fields after add
			artistField.setText(null);
			cdNameField.setText(null);	
			itemField.setText(null);
			nstockField.setText(null);
         priceField.setText(null);
			valueField.setText(null);
			rstkField.setText(null);
			totalField.setText(null);
		}// end ADD
		
		
		// run it
		public static void main(String args[])
		{
		java.awt.EventQueue.invokeLater(new Runnable()
			{
			public void run()
				{
				new Inventory2().setVisible(true);
				}
			});
		}
			
} // close class

That is the first class I have written where I understood what I was doing from start to finish. I do have a few details I need to pick your brain about.
first: CD cd = new CD(artistField.getText());
I know what this is doing, but I am getting the error cannot find symbol pointing at CD.
I even understand the error, I do not see where CD is defined anywhere, nor do I know where it would be put.
second: I also plan to go in an modify my previous Compactdisk and CdwArtist classes for use with this class. How does this class know to use those two?
I never drew first, but I drew first blood.
I'm no ones son, unforgiven.
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Re: Impementing First GUI into Current App

 
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  #18
Jul 24th, 2007
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first: CD cd = new CD(artistField.getText());
I know what this is doing, but I am getting the error cannot find symbol pointing at CD.
I even understand the error, I do not see where CD is defined anywhere, nor do I know where it would be put.
second: I also plan to go in an modify my previous Compactdisk and CdwArtist classes for use with this class. How does this class know to use those two?
CD was the small inner class that I put in my listing to hold cd data. You will want to change that to your own CdwArtist class. You will need to override the toString method on that class so that it shows what you want in the list also. Look at the bottom of my code for the CD class definition to see how that is done.
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Re: Impementing First GUI into Current App

 
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  #19
Jul 24th, 2007
I feel like a genious (about the CdwArtist class), I had just gotten that to work, and have my sets going to that class ...
here is what it looks like now
Java Syntax (Toggle Plain Text) 
  1. 	// Create cd to add
  2. 			CdwArtist cd = new CdwArtist(artistField.getText());
  3. 			cd.setName(cdNameField.getText());	
  4. 			cd.setItemno(itemField.getText());
  5. 			cd.setNstock(nstockField.getText());
  6. 			cd.setPrice(priceField.getText());
  7. 			cd.setValue(valueField.getText());
  8. 			cd.setTotal(totalField.getText());
  9. 			cd.setRestock(rstkField.getText());

It must be working because it sees that some of those fields (Itemno for example) is defined as INT in the other class.
It is erroring telling me that those parameters cannot be applied to java.lang.String
I "kind of" understand what it is saying, I have numbers in these fields, some of which I will be doing calculations as, but it is expecting a String. Right? Where would I alter that?
I am going to look at the toString right now and see if I can figure out what you are telling me there.
Thanks again for your help!
I never drew first, but I drew first blood.
I'm no ones son, unforgiven.
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Re: Impementing First GUI into Current App

 
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  #20
Jul 24th, 2007
I believe I have the toString right.
The only thing I am having trouble with, logically, and code wise at the moment is how to solve the String/Int problem in Inventory2.

Do these fields not need to be int, double, or float in order to perform calculations on them?
I never drew first, but I drew first blood.
I'm no ones son, unforgiven.
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