como obtener los valores de un jtable en java

refrescante color de fondo para una fila en jtable

Question

Estoy tratando de establecer el color de la fila de un Swing Jtable. Yo uso esta clase para extender Jtable como sugerencia en la red.

    public class ColorTable extends JTable {


    private static final long serialVersionUID = 1L;
    private Map rowColor = new HashMap();
    private Map columnColor = new HashMap();
    private Color cellColor;
    private Color defaultColor;

    public ColorTable( TableModel model ) {
        super( model );
    }

    public void setRowColor( int row, Color c) {
        rowColor.put( new Integer( row ), c );
    }

    public void setColumnColor( int column, Color c ) {
        columnColor.put( new Integer( column ), c );
    }

    public void setCellColor( Color c ) {
        cellColor = c;
    }

    public Class getColumnClass(int column) {
        return getValueAt(0, column).getClass();
    }

    public Component prepareRenderer( TableCellRenderer renderer, int row, int column ) {

        Component c = super.prepareRenderer( renderer, row, column );
        if ( defaultColor == null )
            defaultColor = c.getBackground();

        // Color order is as follows:
        // rowSelection, checkBox toggle for row color, column color, cell color
        if ( ! isRowSelected( row ) ) {
            Color color = (Color) rowColor.get( new Integer( row ) );
            if ( color == null || Boolean.FALSE.equals( getModel().getValueAt( row, 0 ) ) )
                color = (Color) columnColor.get( new Integer( column ) );
            if ( color == null ) {
                // cell color only if cell has special value, for example purposes,
                // if the cell value begins with a 2
                Object value = getValueAt( row, column );
                if ( value != null && value.toString().startsWith( "2" ) )
                    color = cellColor;
            }
            if ( color != null )
                c.setBackground( color );
            else
                c.setBackground( defaultColor );
        }
        return c;
    }

    public void resetColor(Color color) {
        for(int i=0;i<this.getRowCount();i++)
            this.setRowColor(i, color);
    }
}

Simplemente agregué el método resetColor (Color de color) para inicializar toda la fila con el mismo color.

Parece que funciona al primer uso, pero cuando quiero cambiar los colores, tengo problemas. por ejemplo, si ejecuto el código de fusión dentro de un oyente de acción de botón coloreo la tabla correctamente justo en la primera iteración y después nunca cambia el fondo.

deployTable.resetColor(Color.green);
// set red background to the
for (Integer x : indexes) { 
    System.out.println("index "+x+" red!");
    deployTable.setRowColor(x, Color.red);
}
deployTable.revalidate();

¿alguien tiene alguna idea sobre lo que podría ser?

Gracias, Ste

Answer 1

Puede sonar cableado respondiendo a una de mis preguntas. pero encontré otra corrección quck a mi error. pero no estoy seguro del motivo. Llamo a un epaint justo antes de validar y todo funciona bien:

deployTable.repaint();
deployTable.revalidate();

Creo que realmente no he aclarado la diferencia al volver a pintar y revalidar. ¿Puede alguien explicármelo?

Answer 2

por ejemplo,

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Random;
import java.util.Vector;
import javax.swing.*;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableCellRenderer;

public class Forum implements ListSelectionListener {

    private JFrame frame = new JFrame("Frame");
    private JPanel fatherCenter = new JPanel();
    private JScrollPane tableScroll = new JScrollPane();
    private myTableModel tableModel;
    private JTable dialogTable;
    private JButton blueButton;
    private ListSelectionModel lsDialog;
    private Color clr;
    private Color clr1;

    private void addComponentsToPane(Container pane) {
        tableModel = new myTableModel();
        dialogTable = new JTable(tableModel) {

            private static final long serialVersionUID = 1L;

            @Override
            public Component prepareRenderer(TableCellRenderer renderer, int row, int column) {
                Component comp = super.prepareRenderer(renderer, row, column);
                JComponent jc = (JComponent) comp;//for Custom JComponent
                if (!isRowSelected(row)) {
                    int modelRow = convertRowIndexToModel(row);
                    boolean type = (Boolean) getModel().getValueAt(modelRow, 2);
                    boolean type1 = (Boolean) getModel().getValueAt(modelRow, 3);
                    comp.setForeground(Color.black);
                    if ((type) && (!type1)) {
                        comp.setBackground(clr1);
                    } else if ((!type) && (type1)) {
                        comp.setBackground(Color.orange);
                    } else if ((!type) || (!type1)) {
                        comp.setBackground(Color.red);
                    } else {
                        comp.setBackground(row % 2 == 0 ? getBackground() : getBackground().darker());
                    }
                    dialogTable.convertRowIndexToView(0);
                } else {
                    comp.setForeground(Color.blue);
                }
                if (!isCellEditable(row, column)) {
                    comp.setForeground(Color.red);
                    comp.setBackground(Color.magenta);
                }
                return comp;
            }
        };
        tableScroll = new JScrollPane(dialogTable, ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED,
                ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED);
        tableScroll.setBorder(null);
        dialogTable.getTableHeader().setReorderingAllowed(false);
        dialogTable.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
        lsDialog = dialogTable.getSelectionModel();
        dialogTable.putClientProperty("terminateEditOnFocusLost", Boolean.TRUE);
        dialogTable.setRowHeight(20);
        dialogTable.setRowMargin(2);
        ListSelectionModel rowSelMod = dialogTable.getSelectionModel();
        //ListSelectionModel colSelMod = dialogTable.getColumnModel().getSelectionModel();
        rowSelMod.addListSelectionListener(this);
        //colSelMod.addListSelectionListener(this);
        blueButton = new JButton(" Blue BackGround ");
        blueButton.setPreferredSize(new Dimension(100, 30));
        blueButton.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                if (clr == Color.white) {
                    clr = Color.orange;
                    clr1 = Color.yellow;
                } else {
                    clr = Color.white;
                    clr1 = Color.black;
                }
                System.out.println(clr);
                dialogTable.setBackground(clr);
                dialogTable.repaint();
            }
        });
        fatherCenter = new JPanel();
        fatherCenter.setLayout(new BorderLayout(10, 10));
        fatherCenter.add(tableScroll, BorderLayout.CENTER);
        fatherCenter.add(blueButton, BorderLayout.SOUTH);
        pane.add(fatherCenter);
    }

    private void addData() {
        Runnable doRun1 = new Runnable() {

            @Override
            public void run() {
                tableModel.resetTable();
                Vector<String> tbl = new Vector<String>();
                Vector<Object> tbl1 = new Vector<Object>();
                Random rnd = new Random();
                tbl.add("Integer");
                tbl.add("Double");
                tbl.add("Boolean");
                tbl.add("Boolean");
                tbl.add("String");
                tableModel.setColumnNames(tbl);
                for (int row = 0; row < 30; row++) {
                    tbl1 = null;
                    tbl1 = new Vector<Object>();
                    tbl1.addElement(row + 1);
                    tbl1.addElement(rnd.nextInt(25) + 3.14);
                    tbl1.addElement((row % 3 == 0) ? false : true);
                    tbl1.addElement((row % 5 == 0) ? false : true);
                    if (row % 7 == 0) {
                        tbl1.add(("Canc"));
                    } else if (row % 6 == 0) {
                        tbl1.add(("Del"));
                    } else {
                        tbl1.add(("New"));
                    }
                    tableModel.addRow(tbl1);
                }
                addTableListener();
            }
        };
        SwingUtilities.invokeLater(doRun1);
    }

    private void addTableListener() {
        tableModel.addTableModelListener(new TableModelListener() {

            @Override
            public void tableChanged(TableModelEvent tme) {
                if (tme.getType() == TableModelEvent.UPDATE) {
                    System.out.println("");
                    System.out.println("Cell " + tme.getFirstRow() + ", "
                            + tme.getColumn() + " changed. The new value: "
                            + tableModel.getValueAt(tme.getFirstRow(),
                            tme.getColumn()));
                }
            }
        });
    }

    public void valueChanged(ListSelectionEvent le) {
        int row = dialogTable.getSelectedRow();
        int col = dialogTable.getSelectedColumn();
        String str = "Selected Row(s): ";
        int[] rows = dialogTable.getSelectedRows();
        for (int i = 0; i < rows.length; i++) {
            str += rows[i] + " ";
        }
        str += "Selected Column(s): ";
        int[] cols = dialogTable.getSelectedColumns();
        for (int i = 0; i < cols.length; i++) {
            str += cols[i] + " ";
        }
        str += "Selected Cell: " + dialogTable.getSelectedRow() + ", " + dialogTable.getSelectedColumn();
        System.out.println(str);
        Object value = dialogTable.getValueAt(row, col);
        System.out.println(String.valueOf(value));
    }

    private void createAndShowGUI() {
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setLayout(new BorderLayout(10, 10));
        addComponentsToPane(frame.getContentPane());
        addData();
        frame.setLocation(150, 150);
        frame.setPreferredSize(new Dimension(400, 647));
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        Forum osFrame = new Forum();
    }

    public Forum() {
        javax.swing.SwingUtilities.invokeLater(new Runnable() {

            @Override
            public void run() {
                createAndShowGUI();
            }
        });
    }

    private class myTableModel extends AbstractTableModel {

        private static final long serialVersionUID = 1L;
        private Vector<Vector<Object>> data;
        private Vector<String> colNames;
        private boolean[] _columnsVisible = {true, true, true, true, true};

        myTableModel() {
            this.colNames = new Vector<String>();
            this.data = new Vector<Vector<Object>>();
        }

        myTableModel(Vector<String> colnames) {
            this.colNames = colnames;
            this.data = new Vector<Vector<Object>>();
        }

        public void resetTable() {
            this.colNames.removeAllElements();
            this.data.removeAllElements();
        }

        public void setColumnNames(Vector<String> colNames) {
            this.colNames = colNames;
            this.fireTableStructureChanged();
        }

        public void addRow(Vector<Object> data) {
            this.data.add(data);
            //this.fireTableDataChanged();
            //this.fireTableStructureChanged();
            this.fireTableRowsInserted(data.size() - 1, data.size() - 1);
        }

        public void removeRowAt(int row) {
            this.data.removeElementAt(row);
            //this.fireTableDataChanged();
            this.fireTableRowsDeleted(row - 1, data.size() - 1);
        }

        @Override
        public int getColumnCount() {
            return this.colNames.size();
        }

        @Override
        public Class<?> getColumnClass(int colNum) {
            switch (colNum) {
                case 0:
                    return Integer.class;
                case 1:
                    return Double.class;
                case 2:
                    return Boolean.class;
                case 3:
                    return Boolean.class;
                default:
                    return String.class;
            }
        }

        @Override
        public boolean isCellEditable(int row, int colNum) {
            switch (colNum) {
                case 2:
                    return false;
                default:
                    return true;
            }
        }

        @Override
        public String getColumnName(int colNum) {
            return this.colNames.get(colNum);
        }

        @Override
        public int getRowCount() {
            return this.data.size();
        }

        @Override
        public Object getValueAt(int row, int col) {
            Vector<Object> value = this.data.get(row);
            return value.get(col);
        }

        @Override
        public void setValueAt(Object newVal, int row, int col) {
            Vector<Object> aRow = data.elementAt(row);
            aRow.remove(col);
            aRow.insertElementAt(newVal, col);
            fireTableCellUpdated(row, col);
        }

        public void setColumnVisible(int index, boolean visible) {
            this._columnsVisible[index] = visible;
            this.fireTableStructureChanged();
        }
    }
}