JTable:按整数排序
JTable:按整数排序
提问于 2012-09-04 20:15:29
我有一个JTable，我希望有时按整数(大小列)排序行，有时按字符串(文件路径)排序。所以我在谷歌上搜索了一下，我已经到了这里。我知道我必须重写DefaultTableModel，的一个叫做getColumnClass.的方法所以我在这里链接我的密码。
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;
}
}在这里，通过模型‘Personal_ model’创建表的代码；我还设置了行排序器。但这一切都行不通！请帮帮我
modeltable = new Personal_model(data,col);
table = new JTable(modeltable);
table.setRowSorter(new TableRowSorter<Personal_model>(modeltable));通常，没有我的分类器，一切都是完美的可视化，字符串的排序是正确的(很明显，因为通常它都是按字符串排序的。)
回答 2
Stack Overflow用户
回答已采纳
发布于 2012-09-04 20:37:42
1)请阅读关于包含JTable示例的TableRowSorter的教程，有关RowSorter的问题必须在您的代码中
2)默认情况下，您可以为ColumnClass使用以下定义，
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)或重写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<TableModel> sorter = new TableRowSorter<TableModel>(table.getModel()) {
@Override
public void toggleSortOrder(int column) {
if (column >= 0 && column < getModelWrapper().getColumnCount() && isSortable(column)) {
List<SortKey> keys = new ArrayList<SortKey>(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<JComponent> {
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);
}
});
}
}Stack Overflow用户
发布于 2012-09-04 22:33:32
正如mKorbel所指出的，您的数据模型是由String组成的，按String排序的数字不会按自然顺序排序(10在1之前)。
您需要首先更改您的模型
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输入的数据是正确的。我们没有这部分代码，但不要使用String来表示Object[][]中的数字
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请记入mKorbel的所有贷方
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/12270738
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