JTable - 排序不使用格式化数字

时间:2014-11-30 07:32:58

标签: java swing sorting jtable integer

我有一个简单的JTable,有3列。数字变大,所以我通过在其中加入逗号来格式化它们,即100,000。但是,这样做,我的表排序不起作用。

我该如何解决这个问题?

package tables;

import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;

public class mainwindow extends JPanel {

 public static void main(String[] args) {
        Object[][] data = {
            {"75,500", "Don't Let Go", new Integer(179)},
            {"121,343", "Photograph", new Integer(29)},
            {"32,323", "Hash Pipe", new Integer(186)}
        };
        Object[] columns = {"Track #", "Title", "Length"};
        DefaultTableModel model = new DefaultTableModel(data,columns) {
            @Override
            public Class getColumnClass(int column) {
                switch (column) {
                    case 0:
                        return String.class;
                    case 1:
                        return String.class;
                    case 2:
                        return Integer.class;
                    default:
                        return String.class;
                }
            }
        };
        JTable table = new JTable(model);
        JScrollPane scroll = new JScrollPane(table);
        table.setAutoCreateRowSorter(true);
        JOptionPane.showMessageDialog(null, scroll);
    }
}

Screenshot of my application

1 个答案:

答案 0 :(得分:3)

你不会因为数据是字符串而不是数字而得到第一列的数字排序,我建议你将数据保存为整数,

   Object[][] data = {
        {75500, "Don't Let Go", new Integer(179)},
        {121343, "Photograph", new Integer(29)},
        {32323, "Hash Pipe", new Integer(186)}
    };

创建并使用具有所需格式的新cellRender:

  table.setDefaultRenderer(Integer.class, new DefaultTableCellRenderer() {
     private NumberFormat numberFormat = new DecimalFormat("#,###,###");
     @Override
     protected void setValue(Object aValue) {
        Integer value = (Integer) aValue;
        super.setValue(numberFormat.format(value));
     }
  });