JTable：按整数排序
我有一个JTable，我想有时按整数（大小列）排序行，有时按字符串（文件路径）排序。 所以我在谷歌搜索它，我来到这里。 我已经知道我要覆盖一个名为getColumnClass的DefaultTableModel方法。 所以我在这里链接我的代码。
class Personal_model extends DefaultTableModel{ Personal_model(String[][] s,String[] i){ super(s,i); } @Override public Class getColumnClass(int columnIndex){ if (columnIndex!=2) return String.class; else return Integer.class; } } 这里是通过模型’Personal_model’创建表的代码; 我还设置了roworter。 但是这一切都不起作用!!!!! 帮帮我吧
modeltable = new Personal_model(data,col); table = new JTable(modeltable); table.setRowSorter(new TableRowSorter(modeltable));
通常情况下，没有我的排序器，所有都是完整的可视化，并且字符串被正确排序（很明显，因为通常它们都按字符串排序..）
1）请阅读有关JTable的教程，其中包含TableRowSorter示例 ，关于RowSorter的问题必须在您的代码中
2）默认情况下，您可以使用ColumnClass的以下定义，
public Class getColumnClass(int c) { return getValueAt(0, c).getClass(); }
3）或者你可以硬编码
@Override public Class getColumnClass(int colNum) { switch (colNum) { case 0: return Integer.class; case 1: return Double.class; case 2: return Long.class; case 3: return Boolean.class; case 4: return String.class; case 5: return Icon.class; default: return String.class; } }
4）或覆盖RowSorter （注意疯狂代码）
import com.sun.java.swing.Painter; import java.awt.BorderLayout; import java.awt.Color; import java.awt.Component; import java.awt.Graphics2D; import java.util.ArrayList; import java.util.List; import javax.swing.*; import javax.swing.table.*; public class JTableSortingIconsForNimbus extends JFrame { private static final long serialVersionUID = 1L; private JTable table; private JTable table1; private static Icon ascendingSortIcon; private static Icon descendingSortIcon; public JTableSortingIconsForNimbus() { Object[] columnNames = {"Type", "Company", "Shares", "Price"}; 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)} }; DefaultTableModel 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); int firstRow = 0; int lastRow = table.getRowCount() - 1; if (row == lastRow) { ((JComponent) c).setBackground(Color.red); } else if (row == firstRow) { ((JComponent) c).setBackground(Color.blue); } else { ((JComponent) c).setBackground(table.getBackground()); } return c; } }; table.setPreferredScrollableViewportSize(table.getPreferredSize()); JScrollPane scrollPane = new JScrollPane(table); add(scrollPane, BorderLayout.NORTH); table1 = 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); int firstRow = 0; int lastRow = table1.getRowCount() - 1; if (row == lastRow) { ((JComponent) c).setBackground(Color.red); } else if (row == firstRow) { ((JComponent) c).setBackground(Color.blue); } else { ((JComponent) c).setBackground(table1.getBackground()); } return c; } }; table1.setPreferredScrollableViewportSize(table1.getPreferredSize()); JScrollPane scrollPane1 = new JScrollPane(table1); //UIDefaults nimbusOverrides = new UIDefaults(); //nimbusOverrides.put("Table.ascendingSortIcon", ascendingSortIcon); //nimbusOverrides.put("Table.descendingSortIcon", descendingSortIcon); //table1.putClientProperty("Nimbus.Overrides", nimbusOverrides); //UIManager.getLookAndFeelDefaults().put("Table.ascendingSortIcon", ascendingSortIcon); //UIManager.getLookAndFeelDefaults().put("Table.descendingSortIcon", descendingSortIcon); UIManager.getLookAndFeelDefaults().put("TableHeader[Enabled].ascendingSortIconPainter", new FillPainter1(new Color(255, 255, 191))); UIManager.getLookAndFeelDefaults().put("TableHeader[Enabled].descendingSortIconPainter", new FillPainter1(new Color(191, 255, 255))); SwingUtilities.updateComponentTreeUI(table1); add(scrollPane1, BorderLayout.SOUTH); TableRowSorter sorter = new TableRowSorter (table.getModel()) { @Override public void toggleSortOrder(int column) { if (column >= 0 && column < getModelWrapper().getColumnCount() && isSortable(column)) { List keys = new ArrayList (getSortKeys()); if (!keys.isEmpty()) { SortKey sortKey = keys.get(0); if (sortKey.getColumn() == column && sortKey.getSortOrder() == SortOrder.DESCENDING) { setSortKeys(null); return; } } } super.toggleSortOrder(column); } }; table.setRowSorter(sorter); table1.setRowSorter(sorter); } static class FillPainter1 implements Painter { private final Color color; public FillPainter1(Color c) { color = c; } @Override public void paint(Graphics2D g, JComponent object, int width, int height) { g.setColor(color); g.fillRect(0, 0, width - 1, height - 1); } } public static void main(String[] args) { try { UIManager.setLookAndFeel("com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel"); ascendingSortIcon = UIManager.getLookAndFeelDefaults().getIcon("Table.ascendingSortIcon"); descendingSortIcon = UIManager.getLookAndFeelDefaults().getIcon("Table.descendingSortIcon"); UIManager.getLookAndFeelDefaults().put("TableHeader[Enabled].ascendingSortIconPainter", new FillPainter1(new Color(127, 255, 191))); UIManager.getLookAndFeelDefaults().put("TableHeader[Enabled].descendingSortIconPainter", new FillPainter1(new Color(191, 255, 127))); } catch (Exception fail) { } SwingUtilities.invokeLater(new Runnable() { @Override public void run() { JTableSortingIconsForNimbus frame = new JTableSortingIconsForNimbus(); frame.setDefaultCloseOperation(EXIT_ON_CLOSE); frame.pack(); frame.setLocationRelativeTo(null); frame.setVisible(true); } }); } }
Jimmy，正如mKorbel指出的那样，你的数据模型由String组成。 将数字排序为String不会按自然顺序排序（10将在1之前下降）。
你需要先改变你的模型
Personal_model(String[][] s,String[] i){
至
Personal_model(Object[][] s,String[] i){
然后，您需要确保您在模型中放置的数据是正确的。 我们没有那段代码，但是不要使用String来表示Object[][]
即
Object[][] myData = new Object[1][2]; myData[0][0] = "This is a String value"; myData[0][1] = 1; // This is not a String value
请给mKorbel所有的信用