mytablemodel.java

java绘图 java awt 经典绘图的例子,对于初学awt模块的人非常有帮助.

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package sortTable;

import javax.swing.JOptionPane;
import javax.swing.table.AbstractTableModel;

class MyTableModel extends AbstractTableModel {

    private boolean DEBUG = true;
    final 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",
    "Chasing toddlers", new Integer(2), new Boolean(false)
},
        {"Sharon", "Zakhour",
    "Speed reading", new Integer(20), new Boolean(true)
},
        {"Angela", "Lih",
    "Teaching high school", new Integer(4), new Boolean(false)
}
    };

    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];
    }

    /*
     * JTable uses this method to determine the default renderer/
     * editor for each cell.  If we didn't implement this method,
     * then the last column would contain text ("true"/"false"),
     * rather than a check box.
     */
    public Class getColumnClass(int c) {
        return getValueAt(0, c).getClass();
    }

    /*
     * Don't need to implement this method unless your table's
     * editable.
     */
    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;
        }
    }

    /*
     * Don't need to implement this method unless your table's
     * data can change.
     */
    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() + ")");
        }

        if (data[0][col] instanceof Integer && !(value instanceof Integer)) {
            //With JFC/Swing 1.1 and JDK 1.2, we need to create
            //an Integer from the value; otherwise, the column
            //switches to contain Strings.  Starting with v 1.3, 
            //the table automatically converts value to an Integer,
            //so you only need the code in the 'else' part of this
            //'if' block.
            try {
                data[row][col] = new Integer(value.toString());
                fireTableCellUpdated(row, col);
            } catch (NumberFormatException e) {
                JOptionPane.showMessageDialog(null,
                        "The \"" + getColumnName(col) + "\" column accepts only integer values.");
            }
        } else {
            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("--------------------------");
    }
    }