在JFrame中显示JTable

在JFrame中显示JTable

参见JTable教程，那里有所有描述

我看不到有使用的理由

AbstractTableModel

，不知道为什么要麻烦JTable包含真正数量的行和列（最多

500/ 1000＆20/ 50

），

DefaultTableModel

而从

或

DefaultTableModel

使用此

AbstractTableModel

进行更改

可以开始

import java.awt.*;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.*;import javax.swing.UIManager.LookAndFeelInfo;import javax.swing.border.LineBorder;import javax.swing.event.ListSelectionEvent;import javax.swing.event.ListSelectionListener;import javax.swing.table.*;public class RemoveAddRows extends Jframe {    private static final long serialVersionUID = 1L;    private Object[] columnNames = {"Type", "Company", "Shares", "Price"};    private Object[][] data = {        {"Buy", "IBM", new Integer(1000), new Double(80.50)},        {"Sell", "MicroSoft", new Integer(2000), new Double(6.25)},        {"Sell", "Apple", new Integer(3000), new Double(7.35)},        {"Buy", "Nortel", new Integer(4000), new Double(20.00)}    };    private JTable table;    private DefaultTableModel model;    private javax.swing.Timer timer = null;    public RemoveAddRows() {        model = new DefaultTableModel(data, columnNames) { private static final long serialVersionUID = 1L; @Override public Class getColumnClass(int column) {     return getValueAt(0, column).getClass(); }        };        table = new JTable(model) { private static final long serialVersionUID = 1L; @Override public Component prepareRenderer(TableCellRenderer renderer, int row, int column) {     Component c = super.prepareRenderer(renderer, row, column);     if (isRowSelected(row) && isColumnSelected(column)) {         ((JComponent) c).setBorder(new LineBorder(Color.red));     }     return c; }        };        ListSelectionModel rowSelMod = table.getSelectionModel();        rowSelMod.addListSelectionListener(new ListSelectionListener() { public void valueChanged(ListSelectionEvent e) {     int row = table.getSelectedRow();     int col = table.getSelectedColumn();     String str = "Selected Row(s): ";     int[] rows = table.getSelectedRows();     for (int i = 0; i < rows.length; i++) {         str += rows[i] + " ";     }     str += "Selected Column(s): ";     int[] cols = table.getSelectedColumns();     for (int i = 0; i < cols.length; i++) {         str += cols[i] + " ";     }     str += "Selected Cell: " + table.getSelectedRow() + ", " + table.getSelectedColumn();     System.out.println(str);     Object value = table.getValueAt(row, col);     System.out.println(String.valueOf(value)); }        });        table.setPreferredScrollableViewportSize(table.getPreferredSize());        JScrollPane scrollPane = new JScrollPane(table);        add(scrollPane);        JButton button1 = new JButton("Remove all rows");        button1.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent arg0) {     if (model.getRowCount() > 0) {         for (int i = model.getRowCount() - 1; i > -1; i--) {  model.removeRow(i);         }     }     System.out.println("model.getRowCount() --->" + model.getRowCount()); }        });        JButton button2 = new JButton("Add new rows");        button2.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent arg0) {     start(); }        });        JPanel southPanel = new JPanel();        southPanel.add(button1);        southPanel.add(button2);        add(southPanel, BorderLayout.SOUTH);    }    private void start() {        timer = new javax.swing.Timer(2500, updateCol());        timer.start();    }    public Action updateCol() {        return new AbstractAction("text load action") { private static final long serialVersionUID = 1L; @Override public void actionPerformed(ActionEvent e) {     DefaultTableModel model = (DefaultTableModel) table.getModel();     Object[] data0 = {"Buy", "IBM", new Integer(1000), new Double(80.50)};     model.addRow(data0);     Object[] data1 = {"Sell", "MicroSoft", new Integer(2000), new Double(6.25)};     model.addRow(data1);     Object[] data2 = {"Sell", "Apple", new Integer(3000), new Double(7.35)};     model.addRow(data2);     Object[] data3 = {"Buy", "Nortel", new Integer(4000), new Double(20.00)};     model.addRow(data3);     System.out.println("model.getRowCount() --->" + model.getRowCount());     timer.stop();     int rowIndex = table.getRowCount() - 1;     table.changeSelection(rowIndex, 0, false, false); }        };    }    public static void main(String[] args) {        try { for (LookAndFeelInfo info : UIManager.getInstalledLookAndFeels()) {     System.out.println(info.getName());     if ("Nimbus".equals(info.getName())) {         UIManager.setLookAndFeel(info.getClassName());         break;     } }        } catch (UnsupportedLookAndFeelException e) { // handle exception        } catch (ClassNotFoundException e) { // handle exception        } catch (InstantiationException e) { // handle exception        } catch (IllegalAccessException e) { // handle exception        }        javax.swing.SwingUtilities.invokeLater(new Runnable() { @Override public void run() {     RemoveAddRows frame = new RemoveAddRows();     frame.setDefaultCloseOperation(EXIT_ON_CLOSE);     frame.pack();     frame.setLocationRelativeTo(null);     frame.setVisible(true); }        });    }}