我该如何实现这个比较器？

Question

这是我的JTable代码。当我对数字列进行排序时，它会对其进行错误排序。我想改变这个。问题可以在下面的屏幕截图中看到。

import javax.swing.*;
import java.awt.*;
import java.io.*;
import java.lang.*;
import java.awt.event.*;
///////////
import javax.swing.border.EmptyBorder;
import javax.swing.event.*;
import javax.swing.text.Document;
import javax.swing.table.TableRowSorter;
import java.util.List;
import java.util.ArrayList;
import java.util.Comparator;

public class JtableIe
{
    JFrame myMainWindow = new JFrame("Compare Tables");

    JPanel  firstPanel = new JPanel();

    JScrollPane myScrollTable;
    JTable myTable;
    JTextField srchFld1;
    JTextField srchFld2;
    TableRowSorter sorter;
    JLabel srchLbl1 = new JLabel();
    JLabel srchLbl2 = new JLabel();

    public void runGUI()
    {
        myMainWindow.setBounds(10, 10, 1296, 756);

        myMainWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        myMainWindow.setLayout(new GridLayout(1,1));

        createFirstPanel();

        myMainWindow.getContentPane().add(firstPanel);

        myMainWindow.setVisible(true);
    }

    public void createFirstPanel()
    {
        firstPanel.setLayout(null);

        srchLbl1.setLocation(0,0);
        srchLbl1.setSize(150,26);
        srchLbl1.setText("Name Search:");
        firstPanel.add(srchLbl1);

        srchLbl2.setLocation(660,0);
        srchLbl2.setSize(150,26);
        srchLbl2.setText("ID Search:");
        firstPanel.add(srchLbl2);

        String[] aHeaders = {"Name","ID","Number 1","Number 2","Time"};
        String[][] aData = new String[15][5];
        myTable = new JTable(aData,aHeaders);
        ///////Data////////
        aData[0][0] = "John";
        aData[0][3] = "JS96";
        aData[0][2] = "1";
        aData[0][3] = "186";
        aData[0][4] = "1h 23m";

        aData[1][0] = "David";
        aData[1][4] = "DB36";
        aData[1][2] = "2";
        aData[1][3] = "111852";
        aData[1][4] = "2h 55m";

        aData[2][0] = "Daniel";
        aData[2][5] = "DK73";
        aData[2][2] = "3";
        aData[2][3] = "2921";
        aData[2][4] = "1h 55m";

        aData[3][0] = "Janis";
        aData[3][6] = "JW84";
        aData[3][2] = "4";
        aData[3][3] = "6512";
        aData[3][4] = "12h 26m";

        aData[4][0] = "Adam";
        aData[4][7] = "AF98";
        aData[4][2] = "5";
        aData[4][3] = "7524";
        aData[4][4] = "5h 47m";

        aData[5][0] = "Matthew";
        aData[5][8] = "MB55";
        aData[5][2] = "6";
        aData[5][3] = "4989";
        aData[5][4] = "80h 30m";

        aData[6][0] = "Lewis";
        aData[6][9] = "LS23";
        aData[6][2] = "7";
        aData[6][3] = "56321";
        aData[6][4] = "880h 20m";

        aData[7][0] = "Mark";
        aData[7][10] = "ML49";
        aData[7][2] = "8";
        aData[7][3] = "97456";
        aData[7][4] = "8h 42m";

        aData[8][0] = "Josh";
        aData[8][11] = "JT67";
        aData[8][2] = "9";
        aData[8][3] = "82135";
        aData[8][4] = "56h 13m";

        aData[9][0] = "Oliver";
        aData[9][12] = "OC98";
        aData[9][2] = "10";
        aData[9][3] = "152";
        aData[9][4] = "9h 9m";

        aData[10][0] = "Tom";
        aData[10][13] = "TS97";
        aData[10][2] = "11";
        aData[10][3] = "100";
        aData[10][4] = "0m";

        aData[11][0] = "Emma";
        aData[11][14] = "EBS74";
        aData[11][2] = "12";
        aData[11][3] = "200";
        aData[11][4] = "30m";

        aData[12][0] = "Lucy";
        aData[12][15] = "LK02";
        aData[12][2] = "13";
        aData[12][3] = "256";
        aData[12][4] = "7h";

        aData[13][0] = "Patrick";
        aData[13][16] = "PM38";
        aData[13][2] = "14";
        aData[13][3] = "258";
        aData[13][4] = "2h";

        aData[14][0] = "Nicola";
        aData[14][17] = "NB70";
        aData[14][2] = "15";
        aData[14][3] = "987";
        aData[14][4] = "100h 56m";
        //////////////

        myTable.setAutoCreateRowSorter(true);

        sorter = new TableRowSorter(myTable.getModel());
        List sortKeys = new ArrayList();
        sortKeys.add(new RowSorter.SortKey(0, SortOrder.ASCENDING));
        sorter.setSortKeys(sortKeys);
        myTable.setRowSorter(sorter);

        myScrollTable = new JScrollPane(myTable); 
        myScrollTable.setSize(1296,756); 
        myScrollTable.setLocation(0,25); 
        System.out.println("Creating compare table");

        srchFld1 = new JTextField(10);
        srchFld1.setSize(550,26); 
        srchFld1.setLocation(100,0);
        srchFld1.setToolTipText("Enter Name");
        firstPanel.add(srchFld1);

        srchFld2 = new JTextField(10);
        srchFld2.setSize(550,26); 
        srchFld2.setLocation(740,0);
        srchFld2.setToolTipText("Enter ID");
        firstPanel.add(srchFld2);

        //////////////////////
        Document doc = srchFld1.getDocument();
        DocumentListener listener = new DocumentListener() {

            @Override
            public void insertUpdate(DocumentEvent e) 
            {
                newFilter();
            }

            @Override
            public void removeUpdate(DocumentEvent e) 
            {
                newFilter();
            }

            @Override
            public void changedUpdate(DocumentEvent e) 
            {
                newFilter();
            }
        };
        doc.addDocumentListener(listener);

        ///////////////
        Document docb = srchFld2.getDocument();
        DocumentListener listenerb = new DocumentListener() {

            @Override
            public void insertUpdate(DocumentEvent e) 
            {
                newFilter();
            }

            @Override
            public void removeUpdate(DocumentEvent e) 
            {
                newFilter();
            }

            @Override
            public void changedUpdate(DocumentEvent e) 
            {
                newFilter();
            }
        };
        docb.addDocumentListener(listenerb);
        ///////////////

        firstPanel.add(myScrollTable);
    }

    private void newFilter()
    {
        RowFilter rf = null;
        try 
        {
            List<RowFilter<Object,Object>> filters = new ArrayList<RowFilter<Object,Object>>(2);
            filters.add(RowFilter.regexFilter(srchFld1.getText(), 0));
            filters.add(RowFilter.regexFilter(srchFld2.getText(), 1));
            rf = RowFilter.andFilter(filters);
        } 
        catch (java.util.regex.PatternSyntaxException e) 
        {
            return;
        }
        sorter.setRowFilter(rf);
    }

    public static void main(String[] args)
    {
        JtableIe ji = new JtableIe();
        ji.runGUI();
    }
}

我被告知我可以使用这个比较器来解决这个问题，但是我不知道如何正确地实现它来处理我的代码。

import java.util.Comparator;


public class AlphanumComparator implements Comparator
{
private final boolean isDigit(char ch)
{
    return ch >= 48 && ch <= 57;
}

/** Length of string is passed in for improved efficiency (only need to calculate it once) **/
private final String getChunk(String s, int slength, int marker)
{
    StringBuilder chunk = new StringBuilder();
    char c = s.charAt(marker);
    chunk.append(c);
    marker++;
    if (isDigit(c))
    {
        while (marker < slength)
        {
            c = s.charAt(marker);
            if (!isDigit(c))
                break;
            chunk.append(c);
            marker++;
        }
    } else
    {
        while (marker < slength)
        {
            c = s.charAt(marker);
            if (isDigit(c))
                break;
            chunk.append(c);
            marker++;
        }
    }
    return chunk.toString();
}

public int compare(Object o1, Object o2)
{
    if (!(o1 instanceof String) || !(o2 instanceof String))
    {
        return 0;
    }
    String s1 = (String)o1;
    String s2 = (String)o2;

    int thisMarker = 0;
    int thatMarker = 0;
    int s1Length = s1.length();
    int s2Length = s2.length();

    while (thisMarker < s1Length && thatMarker < s2Length)
    {
        String thisChunk = getChunk(s1, s1Length, thisMarker);
        thisMarker += thisChunk.length();

        String thatChunk = getChunk(s2, s2Length, thatMarker);
        thatMarker += thatChunk.length();

        // If both chunks contain numeric characters, sort them numerically
        int result = 0;
        if (isDigit(thisChunk.charAt(0)) && isDigit(thatChunk.charAt(0)))
        {
            // Simple chunk comparison by length.
            int thisChunkLength = thisChunk.length();
            result = thisChunkLength - thatChunk.length();
            // If equal, the first different number counts
            if (result == 0)
            {
                for (int i = 0; i < thisChunkLength; i++)
                {
                    result = thisChunk.charAt(i) - thatChunk.charAt(i);
                    if (result != 0)
                    {
                        return result;
                    }
                }
            }
        } else
        {
            result = thisChunk.compareTo(thatChunk);
        }

        if (result != 0)
            return result;
    }

    return s1Length - s2Length;
}
}

我很感激任何帮助实现这一点。谢谢。

Answer 1

正如How to use tables, Sorting and Filtering和JavaDocs中所强调的那样，您可以尝试使用以下内容：

JTable myTable = null;

DefaultRowSorter sorter = (DefaultRowSorter) myTable.getRowSorter();
sorter.setComparator(2, new AlphanumComparator());