JTabel Listener

Du kan tilføje et ListSelectionListener objekt til din JTable og definere en valueChanged(ListSelectionEvent e) {...} metode.

På denne måde er det ligetil at få værdier ud af det brugern klikker på i tabellen.

Se mit nedenstående eksempel:

import java.awt.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;

public class SelectTableExample extends JFrame {

    private    JPanel        topPanel;
    private    JTable        table;
    private    JScrollPane scrollPane;

    public SelectTableExample() {

        setTitle( "ListSelectionListener eksempel" );
        setSize( 300, 200 );
        setBackground( Color.gray );

        topPanel = new JPanel();
        topPanel.setLayout( new BorderLayout() );
        getContentPane().add( topPanel );

        String columnNames[] = { "Column 1", "Column 2", "Column 3" };

        String dataValues[][] =
        {
            { "12", "333", "1337" },
            { "4711", "42", "853" },
            { "93", "89.2", "109" },
            { "279", "9033", "3092" }
        };

        table = new JTable( dataValues, columnNames );

        // Dette er det essentielle:
        ListSelectionModel selectionModel = table.getSelectionModel();
        selectionModel.addListSelectionListener( new ListSelectionListener() {
            /* Metoden definerer hvad vi gør når tabellen vælges
            * du skal definere denne metode, da du implementerer ListSelectionListener
            */
            public void valueChanged( ListSelectionEvent event ) {
               
                if( event.getSource() == table.getSelectionModel() && event.getFirstIndex() >= 0 ) {
                    TableModel model = (TableModel)table.getModel();
   
                    // Hvad er der klikket på?
                    String string = (String)model.getValueAt(
                                            table.getSelectedRow(),
                                            table.getSelectedColumn() );
       
                    System.out.println( "Valgt: = " + string );
                }
            }
        });

        scrollPane = new JScrollPane( table );
        topPanel.add( scrollPane, BorderLayout.CENTER );
    }
}

class Test {

    public static void main( String args[] ) {
        SelectTableExample mainFrame    = new SelectTableExample();
        mainFrame.setVisible( true );
    }
}

Det ser godt det vil jeg arbejde lidt med i eftermiddag,
Hvis jeg i fx ændre dine startværdier til:
--------------
        String dataValues[][] =
        {
            { "", "", "" },
            { "", "", "" },
            { "", "", "" },
            { "", "", "" }
        };

---------------
så kan jeg vel godt udfører en metode i denne del af koden
------------
                    // Hvad er der klikket på?
                    String string = (String)model.getValueAt(
                                            table.getSelectedRow(),
                                            table.getSelectedColumn() );
       
                    System.out.println( "Valgt: = " + string );
--------------

Som udfylder den aktuelle række - eller hvad?

At lave det du lige siger der er lidt mere tricky... jeg arbejder lige på et fyldesgørende eksempel. Jeg har det klar inden for 1 time til 1½.

Here goes:

import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;

public class TableCellRenderTest {
  public static void main(String[] args) { 
     
      JFrame frame = new TableCellRenderFrame();
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     
      /*
      *Sætter JFrame i midten af skærmen
      */   
      int width = Toolkit.getDefaultToolkit().getScreenSize().width;
      int height= Toolkit.getDefaultToolkit().getScreenSize().height;
      frame.setLocation((width-frame.getSize().width)/2,(height-frame.getSize().height) / 2);
     
      frame.show();
  }
}

class TableCellRenderFrame extends JFrame { 
 
  public TableCellRenderFrame() { 
      setTitle("TableEditTest");
      setSize(600, 250);

      TableModel model = new MyTableModel();
      JTable table = new JTable(model);

      table.setDefaultRenderer(Color.class,
        new ColorTableCellRenderer());
      table.setDefaultEditor(Color.class,
        new ColorTableCellEditor());

      JComboBox combo = new JComboBox();
      for (int i = 0; i <= 42; i++)
        combo.addItem(new Integer(i));
       
      TableColumnModel columnModel = table.getColumnModel();
      TableColumn nameColumn = columnModel.getColumn(PlanetTableModel.COMBO_COLUMN);
      nameColumn.setCellEditor(new DefaultCellEditor(combo));

      table.setRowHeight(50);
      getContentPane().add(new JScrollPane(table), BorderLayout.CENTER);
  }
}

class MyTableModel extends AbstractTableModel { 
 
  public String getColumnName(int c) { 
      return columnNames[c];
  }

  public Class getColumnClass(int c) { 
      return cells[0][c].getClass();
  }

  public int getColumnCount() { 
      return cells[0].length;
  }

  public int getRowCount() { 
      return cells.length;
  }

  public Object getValueAt(int r, int c) { 
      return cells[r][c];
  }

  public void setValueAt(Object obj, int r, int c) { 
      cells[r][c] = obj;
  }

  public boolean isCellEditable(int r, int c) { 
      /*
      * Kun disse felter vil jeg lade brugeren editere:
      */
      return c == NAME_COLUMN || c == COMBO_COLUMN || c == CHECKBOX_COLUMN || c == COLOR_COLUMN;
  }

  public static final int NAME_COLUMN = 0;
  public static final int COMBO_COLUMN = 2;
  public static final int CHECKBOX_COLUMN = 3;
  public static final int COLOR_COLUMN = 4;

    /*
    * JTable data:
    */
  private Object[][] cells = {
      { "Howdy", new Double(1337),  new Integer(0), Boolean.FALSE, Color.yellow },
      { "Dav", new Double(4711), new Integer(0), Boolean.FALSE, Color.yellow },
      { "Jow jow", new Double(42), new Integer(1), Boolean.FALSE, Color.blue }
  };

  private String[] columnNames = { "Navn", "Nummer", "ComboBox", "Column4", "Column5" };
}

class ColorTableCellRenderer implements TableCellRenderer {
  public Component getTableCellRendererComponent(JTable table,
      Object value, boolean isSelected, boolean hasFocus,
      int row, int column) { 
      panel.setBackground((Color)value);
      return panel;
  }

  private JPanel panel = new JPanel();
}

class ColorTableCellEditor extends AbstractCellEditor implements TableCellEditor {
   
  private Color color;
  private JColorChooser colorChooser;
  private JDialog colorDialog;
  private JPanel panel;
 
  ColorTableCellEditor() { 
       
        /*
        * Definerer min colorchooser
        */
      panel = new JPanel();
      colorChooser = new JColorChooser();
      /*
      * Lader JColorChooser lave dialogboksen og definerer ActionListeners
      */
      colorDialog = JColorChooser.createDialog(null, "Farve", false, colorChooser,
      new ActionListener() { 
        public void actionPerformed(ActionEvent event) { 
            stopCellEditing();
        }
      },
      new ActionListener() { 
        public void actionPerformed(ActionEvent event) { 
            cancelCellEditing();
        }
      });
     
      colorDialog.addWindowListener(
      new WindowAdapter() {
        public void windowClosing(WindowEvent event) {
            cancelCellEditing();
        }
      });
  }

  public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) { 
      colorChooser.setColor((Color)value);
      return panel;
  }

  public boolean shouldSelectCell(EventObject anEvent) { 

      colorDialog.setVisible(true);

      return true;
  }

  public void cancelCellEditing() { 
      colorDialog.setVisible(false);
      super.cancelCellEditing();
  }

  public boolean stopCellEditing() { 
      colorDialog.setVisible(false);
      super.stopCellEditing();

      return true;
  }

  public Object getCellEditorValue() { 
      return colorChooser.getColor();
  }
}

Der er en fejl i det ovenstående.. du får lige det hele igen.. det er nemmere :)
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;

public class TableCellRenderTest {
  public static void main(String[] args) { 
     
      JFrame frame = new TableCellRenderFrame();
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     
      /*
      *Sætter JFrame i midten af skærmen
      */   
      int width = Toolkit.getDefaultToolkit().getScreenSize().width;
      int height= Toolkit.getDefaultToolkit().getScreenSize().height;
      frame.setLocation((width-frame.getSize().width)/2,(height-frame.getSize().height) / 2);
     
      frame.show();
  }
}

class TableCellRenderFrame extends JFrame { 
 
  public TableCellRenderFrame() { 
      setTitle("TableEditTest");
      setSize(600, 250);

      TableModel model = new MyTableModel();
      JTable table = new JTable(model);

      table.setDefaultRenderer(Color.class,
        new ColorTableCellRenderer());
      table.setDefaultEditor(Color.class,
        new ColorTableCellEditor());

      JComboBox combo = new JComboBox();
      for (int i = 0; i <= 42; i++)
        combo.addItem(new Integer(i));
       
      TableColumnModel columnModel = table.getColumnModel();
      TableColumn nameColumn = columnModel.getColumn(MyTableModel.COMBO_COLUMN);
      nameColumn.setCellEditor(new DefaultCellEditor(combo));

      table.setRowHeight(50);
      getContentPane().add(new JScrollPane(table), BorderLayout.CENTER);
  }
}

class MyTableModel extends AbstractTableModel { 
 
  public String getColumnName(int c) { 
      return columnNames[c];
  }

  public Class getColumnClass(int c) { 
      return cells[0][c].getClass();
  }

  public int getColumnCount() { 
      return cells[0].length;
  }

  public int getRowCount() { 
      return cells.length;
  }

  public Object getValueAt(int r, int c) { 
      return cells[r][c];
  }

  public void setValueAt(Object obj, int r, int c) { 
      cells[r][c] = obj;
  }

  public boolean isCellEditable(int r, int c) { 
      /*
      * Kun disse felter vil jeg lade brugeren editere:
      */
      return c == NAME_COLUMN || c == COMBO_COLUMN || c == CHECKBOX_COLUMN || c == COLOR_COLUMN;
  }

  public static final int NAME_COLUMN = 0;
  public static final int COMBO_COLUMN = 2;
  public static final int CHECKBOX_COLUMN = 3;
  public static final int COLOR_COLUMN = 4;

    /*
    * JTable data:
    */
  private Object[][] cells = {
      { "Howdy", new Double(1337),  new Integer(0), Boolean.FALSE, Color.yellow },
      { "Dav", new Double(4711), new Integer(0), Boolean.FALSE, Color.yellow },
      { "Jow jow", new Double(42), new Integer(1), Boolean.FALSE, Color.blue }
  };

  private String[] columnNames = { "Navn", "Nummer", "ComboBox", "Column4", "Column5" };
}

class ColorTableCellRenderer implements TableCellRenderer {
  public Component getTableCellRendererComponent(JTable table,
      Object value, boolean isSelected, boolean hasFocus,
      int row, int column) { 
      panel.setBackground((Color)value);
      return panel;
  }

  private JPanel panel = new JPanel();
}

class ColorTableCellEditor extends AbstractCellEditor implements TableCellEditor {
   
  private Color color;
  private JColorChooser colorChooser;
  private JDialog colorDialog;
  private JPanel panel;
 
  ColorTableCellEditor() { 
       
        /*
        * Definerer min colorchooser
        */
      panel = new JPanel();
      colorChooser = new JColorChooser();
      /*
      * Lader JColorChooser lave dialogboksen og definerer ActionListeners
      */
      colorDialog = JColorChooser.createDialog(null, "Farve", false, colorChooser,
      new ActionListener() { 
        public void actionPerformed(ActionEvent event) { 
            stopCellEditing();
        }
      },
      new ActionListener() { 
        public void actionPerformed(ActionEvent event) { 
            cancelCellEditing();
        }
      });
     
      colorDialog.addWindowListener(
      new WindowAdapter() {
        public void windowClosing(WindowEvent event) {
            cancelCellEditing();
        }
      });
  }

  public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) { 
      colorChooser.setColor((Color)value);
      return panel;
  }

  public boolean shouldSelectCell(EventObject anEvent) { 

      colorDialog.setVisible(true);

      return true;
  }

  public void cancelCellEditing() { 
      colorDialog.setVisible(false);
      super.cancelCellEditing();
  }

  public boolean stopCellEditing() { 
      colorDialog.setVisible(false);
      super.stopCellEditing();

      return true;
  }

  public Object getCellEditorValue() { 
      return colorChooser.getColor();
  }
}

Du har da vist i så rigelig grad fortjent dine points - jeg takker.

Tak for det :o)