怎么在Jtable中的同一列的不同的jcomboBox

Question

我现在有一个例子，这个例子实现的功能是在同一列中添加的是相同的jComboBox,例子如下：
import javax.swing.DefaultCellEditor;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.GridLayout;
public class TableRenderDemo extends JPanel {
    private boolean DEBUG = false;    public TableRenderDemo() {
        super(new GridLayout(1,0));        JTable table = new JTable(new MyTableModel());
        table.setPreferredScrollableViewportSize(new Dimension(500, 70));
      
        //Create the scroll pane and add the table to it.
        JScrollPane scrollPane = new JScrollPane(table);        //Set up column sizes.
        initColumnSizes(table);
        
        //Fiddle with the Sport column's cell editors/renderers.
        setUpSportColumn(table, table.getColumnModel().getColumn(2));        //Add the scroll pane to this panel.
        add(scrollPane);
    }       private void initColumnSizes(JTable table) {
        MyTableModel model = (MyTableModel)table.getModel();
        TableColumn column = null;
        Component comp = null;
        int headerWidth = 0;
        int cellWidth = 0;
        Object[] longValues = model.longValues;
        TableCellRenderer headerRenderer =
            table.getTableHeader().getDefaultRenderer();        for (int i = 0; i < 5; i++) {
            column = table.getColumnModel().getColumn(i);            comp = headerRenderer.getTableCellRendererComponent(
                                 null, column.getHeaderValue(),
                                 false, false, 0, 0);
            headerWidth = comp.getPreferredSize().width;            comp = table.getDefaultRenderer(model.getColumnClass(i)).
                             getTableCellRendererComponent(
                                 table, longValues[i],
                                 false, false, 0, i);
            cellWidth = comp.getPreferredSize().width;            if (DEBUG) {
                System.out.println("Initializing width of column "
                                   + i + ". "
                                   + "headerWidth = " + headerWidth
                                   + "; cellWidth = " + cellWidth);
            }            column.setPreferredWidth(Math.max(headerWidth, cellWidth));
        }
    }    public void setUpSportColumn(JTable table,
                                 TableColumn sportColumn) {
        //Set up the editor for the sport cells.
        JComboBox comboBox = new JComboBox();
        comboBox.addItem("Snowboarding");
        comboBox.addItem("Rowing");
        comboBox.addItem("Knitting");
        comboBox.addItem("Speed reading");
        comboBox.addItem("Pool");
        comboBox.addItem("None of the above");
        sportColumn.setCellEditor(new DefaultCellEditor(comboBox));        //Set up tool tips for the sport cells.
        DefaultTableCellRenderer renderer =
                new DefaultTableCellRenderer();
        renderer.setToolTipText("Click for combo box");
        sportColumn.setCellRenderer(renderer);
    }    class MyTableModel extends AbstractTableModel {
        private String[] columnNames = {"First Name",
                                        "Last Name",
                                        "Sport",
                                        "# of Years",
                                        "Vegetarian"};
        private 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)}
        };        public final Object[] longValues = {"Sharon", "Campione",
                                            "None of the above",
                                            new Integer(20), Boolean.TRUE};        public int getColumnCount() {
            return columnNames.length;
        }        public int getRowCount() {
            return data.length;
        }        public String getColumnName(int col) {
            return columnNames[col];
        }        public Object getValueAt(int row, int col) {
            return data[row][col];
        }        public Class getColumnClass(int c) {
            return getValueAt(0, c).getClass();
        }
        public boolean isCellEditable(int row, int col) {
            //Note that the data/cell address is constant,
            //no matter where the cell appears onscreen.
            if (col < 2) {
                return false;
            } else {
                return true;
            }
        }
        public void setValueAt(Object value, int row, int col) {
            if (DEBUG) {
                System.out.println("Setting value at " + row + "," + col
                                   + " to " + value
                                   + " (an instance of "
                                   + value.getClass() + ")");
            }            data[row][col] = value;
            fireTableCellUpdated(row, col);            if (DEBUG) {
                System.out.println("New value of data:");
                printDebugData();
            }
        }        private void printDebugData() {
            int numRows = getRowCount();
            int numCols = getColumnCount();            for (int i=0; i < numRows; i++) {
                System.out.print("    row " + i + ":");
                for (int j=0; j < numCols; j++) {
                    System.out.print("  " + data[i][j]);
                }
                System.out.println();
            }
            System.out.println("--------------------------");
        }
    }
    private static void createAndShowGUI() {
        //Create and set up the window.
        JFrame frame = new JFrame("TableRenderDemo");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        //Create and set up the content pane.
        TableRenderDemo newContentPane = new TableRenderDemo();
        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();
            }
        });
    }
}

Answer 1

用不同的celleditior   精確到每一個格子  就行了 

Answer 2

import java.awt.Component;
import java.awt.Dimension;
import java.awt.GridLayout;import javax.swing.DefaultCellEditor;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.TableCellEditor;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;public class TableRenderDemo extends JPanel {
    private boolean DEBUG = false;    public TableRenderDemo() {
        super(new GridLayout(1, 0));        JTable table = new M_Table(new MyTableModel());
        table.setPreferredScrollableViewportSize(new Dimension(500, 70));        // Create the scroll pane and add the table to it.
        JScrollPane scrollPane = new JScrollPane(table);        // Set up column sizes.
        initColumnSizes(table);        // Fiddle with the Sport column's cell editors/renderers.
        setUpSportColumn(table, table.getColumnModel().getColumn(2));        // Add the scroll pane to this panel.
        add(scrollPane);
    }    class M_Table extends JTable {        public M_Table(MyTableModel model) {
            super(model);
        }        public TableCellEditor getCellEditor(int row, int column) {
            if (column == 2) {
                return new DefaultCellEditor(this.getTableCombo(row));
            } else {
                return super.getCellEditor(row, column);
            }
        }        private JComboBox getTableCombo(int row) {
            /**
             * your logic
             */
            if (row == 0) {
                return new JComboBox(new Object[]{"0", "1" });
            } else if (row == 1) {
                return new JComboBox(new Object[]{"1", "2" });
            } else {
                return new JComboBox(new Object[]{"else", "else" });
            }
        }
    }    private void initColumnSizes(JTable table) {
        MyTableModel model = (MyTableModel) table.getModel();
        TableColumn column = null;
        Component comp = null;
        int headerWidth = 0;
        int cellWidth = 0;
        Object[] longValues = model.longValues;
        TableCellRenderer headerRenderer = table.getTableHeader().getDefaultRenderer();        for (int i = 0; i < 5; i++) {
            column = table.getColumnModel().getColumn(i);            comp =
                    headerRenderer.getTableCellRendererComponent(
                        null,
                        column.getHeaderValue(),
                        false,
                        false,
                        0,
                        0);
            headerWidth = comp.getPreferredSize().width;            comp =
                    table
                        .getDefaultRenderer(model.getColumnClass(i))
                        .getTableCellRendererComponent(table, longValues[i], false, false, 0, i);
            cellWidth = comp.getPreferredSize().width;            if (DEBUG) {
                System.out.println("Initializing width of column "
                    + i
                    + ". "
                    + "headerWidth = "
                    + headerWidth
                    + "; cellWidth = "
                    + cellWidth);
            }            column.setPreferredWidth(Math.max(headerWidth, cellWidth));
        }
    }    public void setUpSportColumn(JTable table, TableColumn sportColumn) {
        // Set up the editor for the sport cells.
        // JComboBox comboBox = new JComboBox();
        // comboBox.addItem("Snowboarding");
        // comboBox.addItem("Rowing");
        // comboBox.addItem("Knitting");
        // comboBox.addItem("Speed reading");
        // comboBox.addItem("Pool");
        // comboBox.addItem("None of the above");
        // sportColumn.setCellEditor(new DefaultCellEditor(comboBox));        // Set up tool tips for the sport cells.
        DefaultTableCellRenderer renderer = new DefaultTableCellRenderer();
        renderer.setToolTipText("Click for combo box");
        sportColumn.setCellRenderer(renderer);
    }    class MyTableModel extends AbstractTableModel {
        private String[] columnNames =
                {"First Name", "Last Name", "Sport", "# of Years", "Vegetarian" };        private Object[][] data =
                {
                    {"Mary", "Campione", "0", new Integer(5), new Boolean(false) },
                    {"Alison", "Huml", "1", new Integer(3), new Boolean(true) },
                    {"Kathy", "Walrath", "else", new Integer(2), new Boolean(false) },
                    {"Sharon", "Zakhour", "else", new Integer(20), new Boolean(true) },
                    {"Philip", "Milne", "else", new Integer(10), new Boolean(false) } };        public final Object[] longValues =
                {"Sharon", "Campione", "None of the above", new Integer(20), Boolean.TRUE };        public int getColumnCount() {
            return columnNames.length;
        }        public int getRowCount() {
            return data.length;
        }        public String getColumnName(int col) {
            return columnNames[col];
        }        public Object getValueAt(int row, int col) {
            return data[row][col];
        }        public Class getColumnClass(int c) {
            return getValueAt(0, c).getClass();
        }        public boolean isCellEditable(int row, int col) {
            // Note that the data/cell address is constant,
            // no matter where the cell appears onscreen.
            if (col < 2) {
                return false;
            } else {
                return true;
            }
        }        public void setValueAt(Object value, int row, int col) {
            if (DEBUG) {
                System.out.println("Setting value at "
                    + row
                    + ","
                    + col
                    + " to "
                    + value
                    + " (an instance of "
                    + value.getClass()
                    + ")");
            }            data[row][col] = value;
            fireTableCellUpdated(row, col);            if (DEBUG) {
                System.out.println("New value of data:");
                printDebugData();
            }
        }        private void printDebugData() {
            int numRows = getRowCount();
            int numCols = getColumnCount();            for (int i = 0; i < numRows; i++) {
                System.out.print("    row " + i + ":");
                for (int j = 0; j < numCols; j++) {
                    System.out.print("  " + data[i][j]);
                }
                System.out.println();
            }
            System.out.println("--------------------------");
        }
    }    private static void createAndShowGUI() {
        // Create and set up the window.
        JFrame frame = new JFrame("TableRenderDemo");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        // Create and set up the content pane.
        TableRenderDemo newContentPane = new TableRenderDemo();
        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();
            }
        });
    }
}不知道你要的是不是这个效果

Answer 3

靠,用得着这么复杂么？
设置不同的ComboxModel就好了