如何制作一个按升序排列列表的按钮(JavaSwing)？

sg24os4d 于 2021-07-07 发布在 Java

关注(0)|答案(1)|浏览(376)

我在javaswing中创建了一个jtable，如下所示

我已经添加了6个按钮，其中3个工作正常（添加，更新，删除）。我不担心随机匹配按钮，但我想“排序的目标”按钮，以整理出所有的记录输入的最高数量的目标。积分也是如此。我已经试过很多次了，但我似乎不明白。
下面是我的表数组的代码；

// create JFrame and JTable
    JFrame frame = new JFrame();
    JTable table = new JTable();

    Container c = frame.getContentPane();
    c.setLayout(new BoxLayout(c, BoxLayout.Y_AXIS));
    c.add(table);

    // create a table model and set a Column Identifiers to this model
    Object[] columns = {"Team name", "Wins", "Losses", "Goals Difference","Points","Matches played"};
    DefaultTableModel model = new DefaultTableModel();

    model.setColumnIdentifiers(columns);

    // set the model to the table
    table.setModel(model);

    // Change A JTable Background Color, Font Size, Font Color, Row Height
    table.setBackground(Color.LIGHT_GRAY);
    table.setForeground(Color.black);
    Font font = new Font("", 1, 22);
    table.setFont(font);
    table.setRowHeight(30);
  //  table.setVisible(true);

这是我的按钮草稿；

btnSortPoints.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {

            }
        });

这是我的删除按钮；

btnDelete.addActionListener(new ActionListener(){

            @Override
            public void actionPerformed(ActionEvent e) {

                // i = the index of the selected row
                int i = table.getSelectedRow();
                if(i >= 0){
                    // remove a row from jtable
                    model.removeRow(i);
                }
                else{
                    System.out.println("Delete Error");
                }
            }
        });

这是我的全部代码；

public class table{
        public static void main(String[] args) {

            // create JFrame and JTable
            JFrame frame = new JFrame();
            JTable table = new JTable();

            Container c = frame.getContentPane();
            c.setLayout(new BoxLayout(c, BoxLayout.Y_AXIS));
            c.add(table);

            // create a table model and set a Column Identifiers to this model
            Object[] columns = {"Team name", "Wins", "Losses", "Goals Difference","Points","Matches played"};
            DefaultTableModel model = new DefaultTableModel();

            model.setColumnIdentifiers(columns);

            // set the model to the table
            table.setModel(model);

            // Change A JTable Background Color, Font Size, Font Color, Row Height
            table.setBackground(Color.LIGHT_GRAY);
            table.setForeground(Color.black);
            Font font = new Font("", 1, 22);
            table.setFont(font);
            table.setRowHeight(30);
          //  table.setVisible(true);

            // create JTextFields
            JTextField txtTeamName = new JTextField();
            JTextField txtWins = new JTextField();
            JTextField txtLosses = new JTextField();
            JTextField txtGD = new JTextField();
            JTextField txtPoints = new JTextField();
            JTextField txtMatches = new JTextField();

            JLabel lblTeamName = new JLabel("Team name");
            JLabel lblWins = new JLabel("Wins");
            JLabel lblLosses = new JLabel("Losses");
            JLabel lblGD = new JLabel("Goal difference");
            JLabel lblPoints = new JLabel("Points");
            JLabel lblMatches = new JLabel("Matches");

            // create JButtons
            JButton btnAdd = new JButton("Add");
            JButton btnDelete = new JButton("Delete");
            JButton btnUpdate = new JButton("Update");
            JButton btnSortPoints = new JButton("Sort by points");
            JButton btnSortGoals = new JButton("Sort by goals");
            JButton btnRandomMatch = new JButton("Add a random data");

            txtTeamName.setBounds(1200, 230, 100, 25);
            txtWins.setBounds(1200, 260, 100, 25);
            txtLosses.setBounds(1200, 290, 100, 25);
            txtGD.setBounds(1200, 320, 100, 25);
            txtMatches.setBounds(1200,350,100,25);
            txtPoints.setBounds(1200,380,100,25);

            lblTeamName.setBounds(1100,230,100,25);
            lblWins.setBounds(1100,260,100,25);
            lblLosses.setBounds(1100,290,100,25);
            lblGD.setBounds(1100,320,100,25);
            lblMatches.setBounds(1100,350,100,25);
            lblPoints.setBounds(1100,380,100,25);

            btnAdd.setBounds(1150, 20, 200, 50);
            btnUpdate.setBounds(1150, 80, 200, 50);
            btnDelete.setBounds(1150, 140, 200, 50);
            btnSortGoals.setBounds(920,20,200,50);
            btnSortPoints.setBounds(920,80,200,50);
            btnRandomMatch.setBounds(920,140,200,50);

            // create JScrollPane
            JScrollPane pane = new JScrollPane(table);
            pane.setBounds(0, 0, 880, 400);

            frame.setLayout(null);

            frame.add(pane);

            // add JTextFields to the jframe
            frame.add(txtTeamName);
            frame.add(txtWins);
            frame.add(txtLosses);
            frame.add(txtGD);
            frame.add(txtMatches);
            frame.add(txtPoints);

            //Adding the labels to the frame
            frame.add(lblTeamName);
            frame.add(lblWins);
            frame.add(lblLosses);
            frame.add(lblGD);
            frame.add(lblMatches);
            frame.add(lblPoints);

            // add JButtons to the jframe
            frame.add(btnAdd);
            frame.add(btnDelete);
            frame.add(btnUpdate);
            frame.add(btnSortGoals);
            frame.add(btnSortPoints);
            frame.add(btnRandomMatch);

            // create an array of objects to set the row data
            Object[] row = new Object[6];

            // button add row
            btnAdd.addActionListener(new ActionListener(){

                @Override
                public void actionPerformed(ActionEvent e) {

                    row[0] = txtTeamName.getText();
                    row[1] = txtWins.getText();
                    row[2] = txtLosses.getText();
                    row[3] = txtGD.getText();
                    row[4] = txtMatches.getText();
                    row[5] = txtPoints.getText();

                    // add row to the model
                    model.addRow(row);
                }
            });

            // Event listener for button remove row
            btnDelete.addActionListener(new ActionListener(){

                @Override
                public void actionPerformed(ActionEvent e) {

                    // i = the index of the selected row
                    int i = table.getSelectedRow();
                    if(i >= 0){
                        // remove a row from jtable
                        model.removeRow(i);
                    }
                    else{
                        System.out.println("Delete Error");
                    }
                }
            });

            // get selected row data From table to textfields
            table.addMouseListener(new MouseAdapter(){

                @Override
                public void mouseClicked(MouseEvent e){

                    // i = the index of the selected row
                    int i = table.getSelectedRow();

                    txtTeamName.setText(model.getValueAt(i, 0).toString());
                    txtWins.setText(model.getValueAt(i, 1).toString());
                    txtLosses.setText(model.getValueAt(i, 2).toString());
                    txtGD.setText(model.getValueAt(i, 3).toString());
                    txtMatches.setText(model.getValueAt(i,4).toString());
                    txtPoints.setText(model.getValueAt(i,5).toString());
                }
            });

            // button update row
            btnUpdate.addActionListener(new ActionListener(){

                @Override
                public void actionPerformed (ActionEvent e) {

                    // i = the index of the selected row
                    int i = table.getSelectedRow();

                    if(i >= 0)
                    {
                        model.setValueAt(txtTeamName.getText(), i, 0);
                        model.setValueAt(txtWins.getText(), i, 1);
                        model.setValueAt(txtLosses.getText(), i, 2);
                        model.setValueAt(txtGD.getText(), i, 3);
                        model.setValueAt(txtMatches.getText(),i,4);
                        model.setValueAt(txtPoints.getText(),i,5);
                    }
                    else{
                        System.out.println("Update Error");
                    }
                }
            });

            btnSortPoints.addActionListener(new ActionListener() {

                @Override
                public void actionPerformed(ActionEvent e) {

                }
            });

                    frame.setSize(1400, 500);
            frame.setLocationRelativeTo(null);
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            frame.setVisible(true);

        }

    }

Java Arrays swing

来源：https://stackoverflow.com/questions/65092141/how-do-i-make-a-button-that-sorts-my-list-in-an-ascending-orderjava-swing

1条答案

按热度按时间

qvsjd97n1#

首先需要向jtable添加排序支持。阅读 Sorting and Filtering 有关如何做到这一点的信息，请链接教程。
完成后，用户可以通过单击列的列标题对任何列进行排序。
通过手动单击列标题来验证排序是否有效。
我想“按目标排序”按钮，以整理出所有记录输入的最高数量的目标和点
现在你的 JTable 支持排序您可以添加 ActionListener 按按钮进行特定排序：

btnSortPoints.addActionListener(new ActionListener() {

    @Override
    public void actionPerformed(ActionEvent e) {

        // Points column in the model is converted to the view column

        int viewColumn = table.convertColumnIndexToView(4); 

        // Set up the columns you want to sort on

        List<RowSorter.SortKey> sortKeys = new ArrayList<>();
        sortKeys.add(new RowSorter.SortKey(viewColumn, SortOrder.ASCENDING));

        // Do the sorting

        TableRowSorter sorter = (TableRowSorter)table.getRowSorter();
        sorter.setSortKeys(sortKeys);    
    }
});

`

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如何制作一个按升序排列列表的按钮(JavaSwing)？

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