一个Java JTable例子,带有AbstractTableModel,JScrollPane,isCellEditable,getColumnName,getValueAt

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下面的Java源代码来自Sun,显示了一个JTable示例,包括AbstractTableModel ,JScrollPane和方法:

  • isCellEditable
  • getColumnName
  • getValueAt
  • getRowCount
  • setPreferredScrollableViewportSize

下面是Java JTable源代码例子:

/**
 * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * -Redistribution of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * -Redistribution in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * Neither the name of Sun Microsystems, Inc. or the names of contributors may
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * This software is provided\"AS IS,\" without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
 * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
 * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MIDROSYSTEMS, INC. (\"SUN\")
 * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
 * AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
 * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
 * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
 * INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY
 * OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE,
 * EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 *
 * You acknowledge that this software is not designed, licensed or intended
 * for use in the design, construction, operation or maintenance of any
 * nuclear facility.
 */
/**
 * TableDemo.java is a 1.4 application that requires no other files.
 */
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import java.awt.Dimension;
import java.awt.GridLayout;
/**
 * TableDemo is just like SimpleTableDemo, except that it uses a custom
 * TableModel.
 */
public class TableDemo extends JPanel {
 private boolean DEBUG = false;
 public TableDemo() {
 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);
 //Add the scroll pane to this panel.
 add(scrollPane);
 }
 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 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() +\")\");
 }
 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(\"--------------------------\");
 }
 }
 /**
 * Create the GUI and show it. For thread safety, this method should be
 * invoked from the event-dispatching thread.
 */
 private static void createAndShowGUI() {
 //Make sure we have nice window decorations.
 JFrame.setDefaultLookAndFeelDecorated(true);
 //Create and set up the window.
 JFrame frame = new JFrame(\"TableDemo\");
 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 //Create and set up the content pane.
 TableDemo newContentPane = new TableDemo();
 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();
 }
 });
 }
}
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