RowFilter搜索JTable元素不起作用

Question

我不熟悉在JAVA中实现GUI组件，也不熟悉JTables。我正在尝试通过JTextField（在此代码中称为searchTable）内的用户文本来搜索在此代码中称为myTable的JTable。

我尝试在我的代码中实现一个RowSorter，当用户按下Enter时，该元素将通过在JTextField中查找并显示与用户输入匹配的元素来进行更新，然后通过返回其原始状态进行更新状态，显示用户执行其他操作时JTable中的所有元素。

以下是我当前用于JTable的GUI元素的代码：

（我也尝试过两个for循环，一个循环遍历行，一个循环遍历行。这对我来说并不起作用，因此请在下面注释一下）。

package westminsterlibraryrun;

import java.util.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.table.*;
import javax.swing.*;
import javax.swing.RowFilter.*;


/*
 *
 * @author w1640643
 */
public class LibraryItemTableGUI extends JFrame implements ActionListener {

    JTable myTable;
    JTextField searchTable;
    LibraryItemTable tableModel;
    ArrayList<LibraryItem> itemList;

    public LibraryItemTableGUI(ArrayList<LibraryItem> itemList) {
        this.itemList = itemList;
        tableModel = new LibraryItemTable(itemList);
        myTable = new JTable(tableModel);

        setBounds(10, 10, 400, 300);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        myTable.setAutoCreateRowSorter(true);

        myTable.getColumnModel().getColumn(4).setCellRenderer(new DefaultTableCellRenderer() {
            Color originalcolor = null;

            @Override
            public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {

                Component renderer = super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);

                if (value == "Borrowed") {
                    renderer.setBackground(Color.red);
                } else {
                    renderer.setBackground(Color.GREEN);
                }
                return renderer;
            }
        });

        searchTable = new JTextField("Enter Item TItle You Wish to Search");
        searchTable.addActionListener(this);

        JScrollPane scrollPane = new JScrollPane(myTable);

        scrollPane.setPreferredSize(new Dimension(380, 280));

        JPanel panel = new JPanel();
        panel.add(scrollPane);
        panel.add(searchTable);
        add(scrollPane, BorderLayout.CENTER);
        add(searchTable, BorderLayout.SOUTH);
    }

    @Override
    public void actionPerformed(ActionEvent e) {

        RowFilter<LibraryItemTable, String> filterJTable = new RowFilter<LibraryItemTable, String>() {
            @Override
            public boolean include(Entry<? extends LibraryItemTable, ? extends String> entry) {
                for (int i = entry.getValueCount() - 1; i >= 0; i--) {
                    if (entry.getStringValue(i).equalsIgnoreCase(searchTable.getText())) {
                        return true;
                    }
                }
                System.out.println("False");
                return false;
            }
        };

    }
}

//        @Override
//    public void actionPerformed(ActionEvent e) {
//        for (int i = 0; i < myTable.getRowCount(); i++) {
//            for (int j = 0; j < myTable.getColumnCount(); j++) {
//                String jtableChecker = searchTable.getText();
//                if (myTable.getModel().getValueAt(i, 
//j).equals(jtableChecker)) {
    //                    searchTable.setText("Item Search:   " + //myTable.getModel().getValueAt(i, j));

下面是我的表模型代码：

package westminsterlibraryrun;

import java.util.*;
import javax.swing.*;
import javax.swing.table.*;

/**
 *
 * @author w1640643
 */
public class LibraryItemTable extends AbstractTableModel {

    private String[] columnTitles = {"Item ISBN", "Item Title", "Item Type", "Item Category", /* "Item Published Date", */ "Item Status"};
    private ArrayList<LibraryItem> itemList;

    public LibraryItemTable(ArrayList<LibraryItem> itemList) {
        this.itemList = itemList;
    }

    @Override
    public int getRowCount() {
        return itemList.size();
    }

    @Override
    public int getColumnCount() {
        return columnTitles.length;
    }

    @Override
    public Object getValueAt(int rows, int cols) {
        Object tb = null;
        if (cols == 0) {
            tb = itemList.get(rows).getISBN();
        } else if (cols == 1) {
            tb = itemList.get(rows).getTitle();
        } else if (cols == 2) {
            tb = itemList.get(rows).getItem();
        } else if (cols == 3) {
            tb = itemList.get(rows).getCategory();
//        } else if (cols == 4) {
//            tb = itemList.get(rows).getPublishedDate();
        } else if (cols == 4) {
            tb = itemList.get(rows).getStatus();
        }
        return tb;
    }

    @Override
    public String getColumnName(int cols) {
        return columnTitles[cols];
    }

} //end

我将要运行的指针以及RowSorter（我试图了解RowSorter的给定API页面而对它的工作原理没有真正的了解）的整体工作原理将不胜感激。

谢谢。

更新：

我使用以下代码修复了我的代码：

package westminsterlibraryrun;

import java.util.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.table.*;
import javax.swing.*;
import javax.swing.RowFilter.*;


/*
 *
 * @author w1640643
 */
public class LibraryItemTableGUI extends JFrame implements ActionListener {

    JTable myTable;
    JTextField searchTable;
    LibraryItemTable tableModel;
    ArrayList<LibraryItem> itemList;

    public LibraryItemTableGUI(ArrayList<LibraryItem> itemList) {
        this.itemList = itemList;
        tableModel = new LibraryItemTable(itemList);
        myTable = new JTable(tableModel);

        setBounds(10, 10, 400, 300);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        myTable.setAutoCreateRowSorter(true);

        myTable.getColumnModel().getColumn(4).setCellRenderer(new DefaultTableCellRenderer() {
            Color originalcolor = null;

            @Override
            public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {

                Component renderer = super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);

                if (value == "Borrowed") {
                    renderer.setBackground(Color.red);
                } else {
                    renderer.setBackground(Color.GREEN);
                }
                return renderer;
            }
        });

        searchTable = new JTextField("Enter Item TItle You Wish to Search");
        searchTable.addActionListener(this);

        JScrollPane scrollPane = new JScrollPane(myTable);

        scrollPane.setPreferredSize(new Dimension(380, 280));

        JPanel panel = new JPanel();
        panel.add(scrollPane);
        panel.add(searchTable);
        add(scrollPane, BorderLayout.CENTER);
        add(searchTable, BorderLayout.SOUTH);
    }

    public void searchJTable(String query) {
        TableRowSorter<TableModel> table = new TableRowSorter<>(tableModel);
        myTable.setRowSorter(table);

        table.setRowFilter(RowFilter.regexFilter(query));
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        String query = searchTable.getText();
        searchJTable(query);
    }
}

//        @Override
//    public void actionPerformed(ActionEvent e) {
//        for (int i = 0; i < myTable.getRowCount(); i++) {
//            for (int j = 0; j < myTable.getColumnCount(); j++) {
//                String jtableChecker = searchTable.getText();
//                if (myTable.getModel().getValueAt(i, j).equals(jtableChecker)) {
//                    searchTable.setText("Item Search:   " + myTable.getModel().getValueAt(i, j));

但是，上面的代码现在是好的做法吗？ 我仍然对为什么它以前不起作用感到好奇？