This program, cal1led TwoListjava, is included on the CD-ROM that accompanies this book in Java

Generator PDF-417 2d barcode in Java This program, cal1led TwoListjava, is included on the CD-ROM that accompanies this book
This program, cal1led TwoListjava, is included on the CD-ROM that accompanies this book
Make PDF 417 In Java
Using Barcode maker for Java Control to generate, create PDF417 image in Java applications.
Using the JFC JList Class
Paint Bar Code In Java
Using Barcode generator for Java Control to generate, create bar code image in Java applications.
You will note that the previous example used the AWT List class This is all quite straightforward, but suppose you would like to rewrite the program using the Java Foundation Classes (JFC or "Swing") Most of the methods you use for creating and manipulating the user interface remain the same However, the JFC JList class is markedly different from the AWT List class In fact, because the JList class was designed to represent far more complex kinds of lists, there are virtually no methods in common between the classes AWT List Class JFC JList Class
Read Barcode In Java
Using Barcode scanner for Java Control to read, scan read, scan image in Java applications.
add(string); remove(String) String[] getSelectedItems()
PDF 417 Drawer In C#.NET
Using Barcode creator for Visual Studio .NET Control to generate, create PDF417 image in Visual Studio .NET applications.
Both classes have quite a number of other methods, and almost none of them are closely correlated However, since we have already written the program once and make use of two
Printing PDF-417 2d Barcode In .NET Framework
Using Barcode generator for ASP.NET Control to generate, create PDF-417 2d barcode image in ASP.NET applications.
AM FL Y
Encoding PDF 417 In .NET
Using Barcode creation for .NET Control to generate, create PDF417 image in .NET applications.
71 Team-Fly
Drawing PDF-417 2d Barcode In VB.NET
Using Barcode generator for Visual Studio .NET Control to generate, create PDF 417 image in .NET applications.
na na Object[] getSelectedValues()
EAN-13 Supplement 5 Encoder In Java
Using Barcode generation for Java Control to generate, create European Article Number 13 image in Java applications.
different list boxes, writing an adapter to make the JList class look like the List class will provide a rapid solution to our problem The JList class is a window container that has an array, Vector, or other ListModel class associated with it It is this ListModel that actually contains and manipulates the data Further, the JList class does not contain a scroll bar but instead relies on being inserted in the viewport of the JScrollPane class Data in the JList class and its associated ListModel are not limited to strings; they may be almost any kind of objects, as long as you provide the cell drawing routine for them This makes it possible to have list boxes with pictures illustrating each choice in the list In this case, we are going to create a class that only emulates the List class, which here needs only the three methods shown in the previous table We can define the needed methods as an interface and then make sure that the class that we create implements those methods
Creating Barcode In Java
Using Barcode printer for Java Control to generate, create barcode image in Java applications.
public interface awtList { public void add(String s); public void remove(String s); public String[] getSelectedItems(); }
Encoding USS Code 39 In Java
Using Barcode printer for Java Control to generate, create Code39 image in Java applications.
Interfaces are important in Java because Java does not allow multiple inheritance as C++ does So you cannot create a class that inherits from JList and List at the same time However, you can create a class that inherits from one class hierarchy and implements the methods of another In most cases, this is quite a powerful solution Thus, by using the implements keyword, we can have the class take on the methods and appearance of being a class of either type
Encode Code 128A In Java
Using Barcode creator for Java Control to generate, create USS Code 128 image in Java applications.
The Object Adapter
Draw Bar Code In Java
Using Barcode drawer for Java Control to generate, create barcode image in Java applications.
In the object adapter approach, shown in Figure 92, we create a class that contains a JList class but which implements the methods of the previous awtList interface Since the outer container for a JList is not the list element at all but the JScrollPane that encloses it, we are really adding methods to a subclass of JScrollPane that emulate the methods of the List class These methods are in the interface awtList Figure 92 An object adapter approach to the list adapter
USPS Confirm Service Barcode Generation In Java
Using Barcode maker for Java Control to generate, create Planet image in Java applications.
So, our basic JawtList class looks as follows:
Code128 Creator In .NET
Using Barcode generation for ASP.NET Control to generate, create Code-128 image in ASP.NET applications.
public class JawtList extends JscrollPane implements ListSelectionListener, awtList { private JList listWindow; private JListData listContents; public JawtList (int rows) { listContents = new JListData(); listWindow = new JList(listContents); listWindowsetPrototypeCellValue("Abcdefg Hijkmnop"); getViewport()add(listWindow); } public class JawtList extends JScrollPane implements ListSelectionListener, awtList { private JList listWindow; private JListData listContents; public JawtList (int rows) { listContents = new JlistData(); listWindow = new JList (listContents); listWindowsetPrototypeCellValue("Abcdefg Hijkmnop"); getViewport()add(listWindow); } //--------------------------------------------------public void add(String s) { listContentsaddElement(s); } //--------------------------------------------------public void remove(String s) { listContentsremoveElement(s); } //--------------------------------------------------public String[] getSelectedItems() { Object[] obj = listWindowgetSelectedValues(); String[] s = new String[objlength]; for (int i = 0; i < objlength; i++)
Make ECC200 In VS .NET
Using Barcode creation for Visual Studio .NET Control to generate, create Data Matrix image in VS .NET applications.
s[i] = obj[i]toString(); return s; } //--------------------------------------------------public void valueChanged(ListSelectionEvent e) { } }
Barcode Encoder In VB.NET
Using Barcode encoder for .NET framework Control to generate, create barcode image in .NET framework applications.
Note, however, that the actual data handling takes place in the JListData class This class is derived from the AbstractListModel, which defines the methods listed in the following table: Method Purpose Adds a listener for changes in the data
Encoding Code 128 Code Set C In .NET Framework
Using Barcode creator for .NET Control to generate, create Code128 image in Visual Studio .NET applications.
addListDataListener(l) Removes a listener removeListDataListener(1) fireContentsChanged(obj,min,max) Tells the JList window to redraw Calls
Data Matrix ECC200 Creator In Visual Basic .NET
Using Barcode drawer for VS .NET Control to generate, create ECC200 image in .NET framework applications.
this after any change occurs between the two indexes min and max fireIntervalAdded(obj,min,max) Tells the JList window to redraw Calls this after any data have been added between min and max fireIntervalRemoved(obj,min,max) Tells the JList window to redraw Calls this after any data have been removed between min and max The three fire methods provide the communication path between the data stored in the ListModel and the actual displayed list data Firing them causes the displayed list to be updated In this case, the addElement, and removeElement methods are all that are needed, although you could imagine a number of other useful methods Each time that we add data to the data vector, we call the fireIntervalAdded method to tell the list display to refresh that area of the displayed list
Creating UCC-128 In .NET
Using Barcode creator for ASP.NET Control to generate, create EAN / UCC - 14 image in ASP.NET applications.
public class JListData extends AbstractListModel { private Vector data; public JListData() { data = new Vector(); } //-------------public int getSize() { return datasize(); } //-------------public Object getElementAt (int index) { return dataelementAt(index); } //-------------public void addElement(String s) { dataaddElement(s); fireIntervalAdded(this, datasize()-1, datasize()); } //-------------public void removeElement(String s) { dataremoveElement(s); fireIntervalRemoved(this, 0, datasize());
Generating Code 3 Of 9 In C#
Using Barcode encoder for .NET framework Control to generate, create USS Code 39 image in .NET applications.