Swing JTable mit booleans

[Developer_X]

Hi, ich habe mal hier einen Code, von den ofiziellen SunSystems, deren Programm, wie sie behaupten, so aussieht, wenn man das ganze mal kompiliert

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package Main;

/*
 * SimpleTableDemo.java requires no other files.
 */

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

public class SimpleTableDemo extends JPanel {
    private boolean DEBUG = false;

    public SimpleTableDemo() {
        super(new GridLayout(1,0));

        String[] columnNames = {"First Name",
                                "Last Name",
                                "Sport",
                                "# of Years",
                                "Vegetarian"};

        Object[][] data = {
            {"Mary", "Campione",
             "Snowboarding", new Integer(5), new Boolean(false)},
            {"Alison", "Huml",
             "Rowing", new Integer(3), new Boolean(true)},
            {"Kathy", "Walrath",
             "Knitting", new Integer(2), new Boolean(false)},
            {"Sharon", "Zakhour",
             "Speed reading", new Integer(20), new Boolean(true)},
            {"Philip", "Milne",
             "Pool", new Integer(10), new Boolean(false)}
        };

        final JTable table = new JTable(data, columnNames);
        table.setPreferredScrollableViewportSize(new Dimension(500, 70));
        table.setFillsViewportHeight(true);

        if (DEBUG) {
            table.addMouseListener(new MouseAdapter() {
                public void mouseClicked(MouseEvent e) {
                    printDebugData(table);
                }
            });
        }

        //Create the scroll pane and add the table to it.
        JScrollPane scrollPane = new JScrollPane(table);

        //Add the scroll pane to this panel.
        add(scrollPane);
    }

    private void printDebugData(JTable table) {
        int numRows = table.getRowCount();
        int numCols = table.getColumnCount();
        javax.swing.table.TableModel model = table.getModel();

        System.out.println("Value of data: ");
        for (int i=0; i < numRows; i++) {
            System.out.print("    row " + i + ":");
            for (int j=0; j < numCols; j++) {
                System.out.print("  " + model.getValueAt(i, j));
            }
            System.out.println();
        }
        System.out.println("--------------------------");
    }

    /**
     * Create the GUI and show it.  For thread safety,
     * this method should be invoked from the
     * event-dispatching thread.
     */
    private static void createAndShowGUI() {
        //Create and set up the window.
        JFrame frame = new JFrame("SimpleTableDemo");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        //Create and set up the content pane.
        SimpleTableDemo newContentPane = new SimpleTableDemo();
        newContentPane.setOpaque(true); //content panes must be opaque
        frame.setContentPane(newContentPane);

        //Display the window.
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        //Schedule a job for the event-dispatching thread:
        //creating and showing this application's GUI.
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
            }
        });
    }
}

Bei mir allerdings, steht da, wo die JCHeckBoxen sein sollten, einfache Labels, die true oder false lauten, warum?

 

[eRaaaa]

benutz die andere demo

z.b. diese:
http://java.sun.com/docs/books/tuto...roject/src/components/TableSelectionDemo.java

da hast du dann auch deine checkboxen

 

[Michael...]

Hi, ich habe mal hier einen Code, von den ofiziellen SunSystems, deren Programm, wie sie behaupten, so aussieht, wenn man das ganze mal kompiliert

Das ist ja eine glatte Falschaussage ;-)
siehe weitere Ausführungen zum SimpleTableDemo

There are two JTable constructors that directly accept data (SimpleTableDemo uses the first):

JTable(Object[][] rowData, Object[] columnNames)
JTable(Vector rowData, Vector columnNames)
The advantage of these constructors is that they are easy to use. However, these constructors also have disadvantages:

They automatically make every cell editable.
They treat all data types the same (as strings). For example, if a table column has Boolean data, the table can display the data in a check box. However, if you use either of the two JTable constructors listed previously, your Boolean data is displayed as a string.

Du könntest Zeile 72 mit folgendem Code ersetzen:

final JTable table = new JTable(data, columnNames) {
        	public Class getColumnClass(int c) {
                return getValueAt(0, c).getClass();
            }
};

 

[Developer_X]

danke

 

[Spacerat]

Musst doch eigentlich nur weiter lesen... bis ungefähr User Selections...
@Edit: Oh... hab' ich doch so lange gebraucht, um drauf zu kommen?