🚀 go-pugleaf

Start fresh with an new Core JDK and Swing Application.
  Add a JScrollPane Swing Container to the JFrame
  Add a JTable to the JScrollPane

File | New | Class
  Extend from com.sun.java.swing.table.AbstractTableModel
    NOTE: It would be nice if the Class wizard could browse through
    the libraries to find the name of the class to extend.

Wizards | Implement Interface
  Implement the com.sun.java.swing.table.TableModel interface.

Save All; Build All - ERRORS...

Use of the Implement Interface Wizard was an attempt to add the "stub"
code necessary to make this new class an 'implementable' class rather
than just another abstract class.  AbstractTableModel does implement
some of the necessary methods in the TreeModel interface, but not all. 
I was hoping that the interface wizard would be smart enough to
implement the rest.  It adds only the implements phrase when the
implements phrase was not really necessary.

  public class MyClass1 extends AbstractTableModel implements TableModel
{
                                                   ^^^^^^^^^^^^^^^^^^^^^

If you compile the new class at this point it will error out indicating
that the class should be declared abstract since it does not implement
the getValueAt(int, int) method.  Add the method and compile again and
the compiler asks you to implement the getColumnCount() method.  Add the
method and compile again and the compiler asks you to implement the
getRowCount() method.  This is what the implement interface wizard was
designed to avoid isn't it?

getRowCount(), getValueAt(int, int), and getColumnCount() were the
methods I was hoping that the Implement Interface Wizard would have
added for me.  Yes, I realize that I must 'do' something in these
methods.  Here is an example implementation of the methods for the new
class (MyClass1) just created...

  public Object getValueAt(int rowIndex, int columnIndex){
    return new String("test");}
  public int getColumnCount(){
    return 5;}
  public int getRowCount(){
    return 5;}

The new class created (MyClass1) does not show up in the pull down of
the model attribute of the jTabel component, you must manually add the
following line of code in the jbInit() of the JFrame...

    jTable1.setModel(new MyClass1());

If you follow the above steps and add the above code, you will get a
compilable/runnable application that displays a table five by five with
the string text "test" in each rows column.  After you compile MyClass1,
the designer will display the text values as well.

I would like the tool to be a little more helpful in working with Swing
Models and Components (MVC).  I feel like I am using a hammer to drive a
nail through a plane of wood and the nail is not moving at all.  The
hammer is not doing its job.  I will add that I am impressed that the
designer is responding quite nicely to the manual code edits I have
added.  "Under the hood" JBuilder is MVC solid!  But the wizzards and
code generaors could stand to be updated a little for more MVC type
programming.

Thanks!
-Geoff


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