JTable:按整数排序 [英] JTable: sorting by Integer
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问题描述
我有一个JTable，我想有时按整数(大小列)，有时按字符串(文件路径)对行进行排序. 因此，我在Google上进行了搜索，并且已经到达了这里.我知道我必须重写称为 getColumnClass 的 DefaultTableModel 方法.所以我在这里链接我的代码.
I have a JTable, and i want to sort rows sometimes by integer (size column), sometimes by String (file path). So i searched it on google and i've arrived here. i've known that i've to override a method of DefaultTableModel, called getColumnClass. So i link here my code.
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;
}
}
这里是模型"Personal_model"创建表的代码；我还设置rowsorter. 但是所有这些都不起作用!!!!!请帮我
And here the code to create the table, by the model 'Personal_model'; i also set rowsorter. BUT ALL THIS DOESN'T WORK!!!!! help me pls
modeltable = new Personal_model(data,col);
table = new JTable(modeltable);
table.setRowSorter(new TableRowSorter<Personal_model>(modeltable));
通常，没有我的排序器，所有内容都会可视化，并且可以正确地对字符串进行排序(这很明显，因为通常它们都是按字符串排序的.)
Normally, without my sorter, all is perfeclty visualized, and Strings are sorted correctly (it's obvious, beacuse normally it's all sorted by String..)
推荐答案
1) please read tutorial about JTable that's contains TableRowSorter example, issue about RowSorter must be in your code
2)默认情况下，您可以对ColumnClass使用以下定义
2) by default you can to use follows definition for ColumnClass,
public Class getColumnClass(int c) {
return getValueAt(0, c).getClass();
}
3)或您可以对其进行硬编码
3) or you can to hardcode that
@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)
4) or override RowSorter (notice crazy code)
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);
}
});
}
}
这篇关于JTable:按整数排序的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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