Kirill提出的问题

Kirill

Asked: 2024-11-26 19:36:01 +0800 CST

输入一个 JTable 单元格的值后，该单元格的值会复制到所有单元格

我有一个程序，目前实现了添加和删除表格列的功能，但有一个问题：当您向该表格中输入值时，它们开始在其他单元格中重复：

我在一个单元格中输入一个值：

然后我按 Enter 键停止编辑单元格，不知何故，该单元格左侧的所有单元格都神奇地填充了相同的值：

如果我单击该单元格右侧的任何单元格，则原始单元格和单击单元格之间的所有单元格（包括它）都将填充相同的值：

如果我与按钮交互以沿着一行单元格移动，则所有单元格都会填充相同的值。

代码：

package ru.kirill.task9;


import java.awt.Color;
import java.awt.Component;
import java.awt.Container;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.DefaultCellEditor;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;

import ru.kirill.addition.Addition;


public class GraphicApp {
    private boolean isReverse = false;

    class MainFrame extends JFrame {
        private static final String TITLE = "Главное меню";
        private static final String MINUS = "-";
        private static final String PLUS = "+";
        private static final String OPEN_BUTTON_TEXT = "Открыть";
        private static final String SAVE_BUTTON_TEXT = "Сохранить";
        private static final String REVERSE_BUTTON_TEXT = "Перевернуть";
        private static final String ENTER_LABEL_TITLE = "Количество элементов";
        private static final String CALCULATE_BUTTON_TEXT = "Рассчитать";
        private static final String REFRESH_BUTTON_TEXT = "Обновить";

        JButton minusButton;
        JButton refreshButton;
        JButton plusButton;
        JButton openButton;
        JButton saveButton;
        JButton reverseButton;
        JButton calculateButton;
        JTable inputTable;
        JTable outputTable;
        JLabel titleOfEnterQuantityElements;
        JTextField fieldOfEnterQuantityElements;


        MainFrame() {
            super(TITLE);
            setDefaultCloseOperation(EXIT_ON_CLOSE);
            createMainFrameLayout();

            minusButton.addActionListener(new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                    int numberOfCells = Integer.parseInt(fieldOfEnterQuantityElements.getText());
                    if (numberOfCells > 1) {
                        fieldOfEnterQuantityElements.setText(
                            Integer.toString(
                                numberOfCells - 1));
                    }
                }
            });

            refreshButton.addActionListener(new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                    int numberOfCells = 1;
                    try {
                        numberOfCells = Integer.parseInt(fieldOfEnterQuantityElements.getText());
                    } catch (NumberFormatException err) {
                        JOptionPane.showMessageDialog(null,
                                                      "Вы ввели неверное значение");
                        fieldOfEnterQuantityElements.setText("1");
                    }
                    int columnCount = inputTable.getColumnCount();
                    if (numberOfCells < 1) {
                        numberOfCells = 1;
                        fieldOfEnterQuantityElements.setText("1");
                    }
                    if (numberOfCells < columnCount) {
                        TableColumnModel inputTableModel = inputTable.getColumnModel();
                        for (int i = 0; i < columnCount - numberOfCells; i++) {
                            inputTable.removeColumn(inputTableModel.getColumn(columnCount - i - 1));
                        }
                    } else {
                        for (int i = 0; i < numberOfCells - columnCount; i++) {
                            TableColumn newColumn = new TableColumn();
                            newColumn.setCellRenderer(new CustomCellRenderer());
                            newColumn.setCellEditor(new CustomCellEditor(new JTextField()));
                            inputTable.addColumn(newColumn);
                        }
                    }
                }
            });

            plusButton.addActionListener(new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                    fieldOfEnterQuantityElements.setText(
                        Integer.toString(
                            Integer.parseInt(fieldOfEnterQuantityElements.getText()) + 1));
                }
            });

            pack();
            setSize(600, 285);
            setLocationRelativeTo(null);
            setResizable(false);
            setVisible(true);

            calculateButton.addActionListener(new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                    for (int i = 0; i < inputTable.getColumnCount(); i++) {
                        System.out.print(inputTable.getValueAt(0, i));
                    }
                }
            });
        }


        private void createMainFrameLayout() {
            Container pane = getContentPane();
            pane.setLayout(new GridBagLayout());
            GridBagConstraints layout = new GridBagConstraints();

            JPanel topInteractionPanel = new JPanel(new GridBagLayout());
            topInteractionPanel.setBackground(Color.GREEN);
            layout.fill = GridBagConstraints.BOTH;
            layout.weightx = 1;
            layout.weighty = 0.15;
            layout.gridx = 0;
            layout.gridy = 0;
            layout.gridwidth = 1;
            layout.gridheight = 1;
            pane.add(topInteractionPanel, layout);

            minusButton = new JButton(MINUS);
            layout.fill = GridBagConstraints.BOTH;
            layout.weightx = 0.1;
            layout.weighty = 1;
            layout.gridx = 0;
            layout.gridy = 0;
            layout.gridwidth = 1;
            layout.gridheight = 1;
            topInteractionPanel.add(minusButton, layout);

            JPanel enterQuantityElementsPanel = new JPanel(new GridBagLayout());
            layout.weightx = 0.8;
            layout.weighty = 1;
            layout.gridx = 1;
            layout.gridy = 0;
            layout.gridwidth = 1;
            layout.gridheight = 1;
            topInteractionPanel.add(enterQuantityElementsPanel, layout);

            titleOfEnterQuantityElements = new JLabel(ENTER_LABEL_TITLE);
            layout.weightx = 1;
            layout.weighty = 0.5;
            layout.gridx = 0;
            layout.gridy = 0;
            layout.gridwidth = 1;
            layout.gridheight = 1;
            enterQuantityElementsPanel.add(titleOfEnterQuantityElements, layout);

            JPanel enterTextFieldPanel = new JPanel(new GridBagLayout());
            layout.weightx = 1;
            layout.weighty = 0.5;
            layout.gridx = 0;
            layout.gridy = 1;
            layout.gridwidth = 1;
            layout.gridheight = 1;
            enterQuantityElementsPanel.add(enterTextFieldPanel, layout);

            fieldOfEnterQuantityElements = new JTextField();
            fieldOfEnterQuantityElements.setText("1");
            layout.weightx = 0.7;
            layout.weighty = 1;
            layout.gridx = 0;
            layout.gridy = 0;
            layout.gridwidth = 1;
            layout.gridheight = 1;
            enterTextFieldPanel.add(fieldOfEnterQuantityElements, layout);

            refreshButton = new JButton(REFRESH_BUTTON_TEXT);
            layout.weightx = 0.3;
            layout.weighty = 1;
            layout.gridx = 1;
            layout.gridy = 0;
            layout.gridwidth = 1;
            layout.gridheight = 1;
            enterTextFieldPanel.add(refreshButton, layout);

            plusButton = new JButton(PLUS);
            layout.weightx = 0.1;
            layout.weighty = 1;
            layout.gridx = 2;
            layout.gridy = 0;
            layout.gridwidth = 1;
            layout.gridheight = 1;
            topInteractionPanel.add(plusButton, layout);


            JPanel inputTablePanel = new JPanel(new GridBagLayout());
            inputTablePanel.setBackground(Color.BLUE);
            layout.fill = GridBagConstraints.BOTH;
            layout.weightx = 1;
            layout.weighty = 0.30;
            layout.gridx = 0;
            layout.gridy = 1;
            layout.gridwidth = 1;
            layout.gridheight = 1;
            pane.add(inputTablePanel, layout);

            inputTable = new JTable(1, 1);
            TableColumnModel inputTableModel = inputTable.getColumnModel();
            TableColumn firstColumn = new TableColumn();
            firstColumn.setCellRenderer(new CustomCellRenderer());
            firstColumn.setCellEditor(new CustomCellEditor(new JTextField()));
            inputTableModel.addColumn(firstColumn);
            inputTableModel.removeColumn(inputTable.getColumnModel().getColumn(0));
            inputTable.setTableHeader(null);
            inputTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
            inputTable.setRowHeight(50);
            JScrollPane inputScrollPane = new JScrollPane(inputTable);
            layout.fill = GridBagConstraints.BOTH;
            layout.weightx = 1;
            layout.weighty = 1;
            layout.gridx = 0;
            layout.gridy = 0;
            layout.gridwidth = 1;
            layout.gridheight = 1;
            inputTablePanel.add(inputScrollPane, layout);


            JPanel bottomInteractionPanel = new JPanel(new GridBagLayout());
            bottomInteractionPanel.setBackground(Color.ORANGE);
            layout.fill = GridBagConstraints.BOTH;
            layout.weightx = 1;
            layout.weighty = 0.15;
            layout.gridx = 0;
            layout.gridy = 2;
            layout.gridwidth = 1;
            layout.gridheight = 1;
            pane.add(bottomInteractionPanel, layout);

            openButton = new JButton(OPEN_BUTTON_TEXT);
            layout.weightx = 0.25;
            layout.weighty = 1;
            layout.gridx = 0;
            layout.gridy = 0;
            layout.gridwidth = 1;
            layout.gridheight = 1;
            bottomInteractionPanel.add(openButton, layout);

            saveButton = new JButton(SAVE_BUTTON_TEXT);
            layout.weightx = 0.25;
            layout.weighty = 1;
            layout.gridx = 1;
            layout.gridy = 0;
            layout.gridwidth = 1;
            layout.gridheight = 1;
            bottomInteractionPanel.add(saveButton, layout);

            reverseButton = new JButton(REVERSE_BUTTON_TEXT);
            layout.weightx = 0.25;
            layout.weighty = 1;
            layout.gridx = 2;
            layout.gridy = 0;
            layout.gridwidth = 1;
            layout.gridheight = 1;
            bottomInteractionPanel.add(reverseButton, layout);

            calculateButton = new JButton(CALCULATE_BUTTON_TEXT);
            layout.weightx = 0.25;
            layout.weighty = 1;
            layout.gridx = 3;
            layout.gridy = 0;
            layout.gridwidth = 1;
            layout.gridheight = 1;
            bottomInteractionPanel.add(calculateButton, layout);


            JPanel outputTablePanel = new JPanel(new GridBagLayout());
            outputTablePanel.setBackground(Color.RED);
            layout.fill = GridBagConstraints.BOTH;
            layout.weightx = 1;
            layout.weighty = 0.30;
            layout.gridx = 0;
            layout.gridy = 3;
            layout.gridwidth = 1;
            layout.gridheight = 1;
            pane.add(outputTablePanel, layout);

            outputTable = new JTable(1, 1);
            outputTable.setTableHeader(null);
            outputTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
            outputTable.setRowHeight(50);
            outputTable.setEnabled(false);
            JScrollPane outputScrollPane = new JScrollPane(outputTable);
            layout.fill = GridBagConstraints.BOTH;
            layout.weightx = 1;
            layout.weighty = 1;
            layout.gridx = 0;
            layout.gridy = 0;
            layout.gridwidth = 1;
            layout.gridheight = 1;
            outputTablePanel.add(outputScrollPane, layout);
        }


        class CustomCellEditor extends DefaultCellEditor {
            public CustomCellEditor(JTextField textField) {
                super(textField);
                this.clickCountToStart = 1;
            }
        }


        class CustomCellRenderer extends DefaultTableCellRenderer {
            public Component getTableCellRendererComponent(JTable table, Object value,
                                                           boolean isSelected, boolean hasFocus,
                                                           int row, int column) {
                setFont(table.getFont());
                setValue(value);
                return this;
            }
        }
    }


    public GraphicApp() {
        new MainFrame();
    }
    public GraphicApp(boolean isReverse) {
        this.isReverse = isReverse;
        new MainFrame();
    }


    public static void main(String[] args) {
        new GraphicApp();
    }
}

如何删除此自动完成功能以使一切正常？

Kirill

Asked: 2024-11-25 03:15:22 +0800 CST

使用 GridBagLayout 布局管理器在 JFrame 中排列组件 [关闭]

关闭这个问题是题外话。目前不接受对此问题的答复。

该问题是由于无法重现或拼写错误造成的。虽然类似的问题可能与本网站相关，但该问题的解决方案不太可能对未来的访问者有帮助。您通常可以通过在发布问题之前编写和研究一个最小的程序来重现问题来避免此类问题。

13 小时前关闭。

改进问题

我需要这样安排组件：在第一行中有 2 个按钮，占据窗口整个高度的一半，它们的宽度比是 1:2，在第二行中一切都相同，但宽度比是2:1。我使用 GridBagLayout 来布局组件，因为......我发现它对于我的应用程序布局来说足够简单和灵活，但它并不像我想象的那样工作。

我写了代码：

Container pane = getContentPane();
pane.setLayout(new GridBagLayout());
GridBagConstraints layout = new GridBagConstraints();

JButton openButton = new JButton(OPEN_BUTTON_TEXT);
layout.fill = GridBagConstraints.BOTH;
layout.weightx = 0.33;
layout.weighty = 0.5;
layout.gridx = 0;
layout.gridy = 0;
layout.gridwidth = 1;
layout.gridheight = 1;
pane.add(openButton, layout);

JButton saveButton = new JButton(SAVE_BUTTON_TEXT);
layout.fill = GridBagConstraints.BOTH;
layout.weightx = 0.66;
layout.weighty = 0.5;
layout.gridx = 1;
layout.gridy = 0;
layout.gridwidth = 1;
layout.gridheight = 1;
pane.add(saveButton, layout);

JButton reverseButton = new JButton(REVERSE_BUTTON_TEXT);
layout.fill = GridBagConstraints.BOTH;
layout.weightx = 0.66;
layout.weighty = 0.5;
layout.gridx = 0;
layout.gridy = 1;
layout.gridwidth = 1;
layout.gridheight = 1;
pane.add(reverseButton, layout);

JButton calculateButton = new JButton("Рассчитать");
layout.fill = GridBagConstraints.BOTH;
layout.weightx = 0.33;
layout.weighty = 0.5;
layout.gridx = 1;
layout.gridy = 1;
layout.gridwidth = 1;
layout.gridheight = 1;
pane.add(calculateButton, layout);

我的期望：图1

最终输出：图像 2

我尝试从 JPanel 创建行并在其中放置按钮，但最终输出与预期相差甚远。代码：

Container pane = getContentPane();
pane.setLayout(new GridBagLayout());
GridBagConstraints layout = new GridBagConstraints();

JPanel panel1 = new JPanel();
panel1.setBackground(Color.BLUE);
panel1.setLayout(new GridBagLayout());
layout.fill = GridBagConstraints.BOTH;
layout.weightx = 1;
layout.weighty = 0.5;
layout.gridx = 0;
layout.gridy = 0;
layout.gridwidth = 1;
layout.gridheight = 1;
pane.add(panel1, layout);

JButton openButton = new JButton(OPEN_BUTTON_TEXT);
layout.fill = GridBagConstraints.BOTH;
layout.weightx = 0.33;
layout.weighty = 1;
layout.gridx = 0;
layout.gridy = 0;
layout.gridwidth = 1;
layout.gridheight = 1;
panel1.add(openButton, layout);

JButton saveButton = new JButton(SAVE_BUTTON_TEXT);
layout.fill = GridBagConstraints.BOTH;
layout.weightx = 0.66;
layout.weighty = 1;
layout.gridx = 1;
layout.gridy = 0;
layout.gridwidth = 1;
layout.gridheight = 1;
panel1.add(saveButton, layout);


JPanel panel2 = new JPanel();
panel2.setBackground(Color.GREEN);
panel1.setLayout(new GridBagLayout());
layout.fill = GridBagConstraints.BOTH;
layout.weightx = 1;
layout.weighty = 0.5;
layout.gridx = 0;
layout.gridy = 1;
layout.gridwidth = 1;
layout.gridheight = 1;
pane.add(panel2, layout);

JButton reverseButton = new JButton(REVERSE_BUTTON_TEXT);
layout.fill = GridBagConstraints.BOTH;
layout.weightx = 0.66;
layout.weighty = 1;
layout.gridx = 0;
layout.gridy = 0;
layout.gridwidth = 1;
layout.gridheight = 1;
panel2.add(reverseButton, layout);

JButton calculateButton = new JButton("Рассчитать");
layout.fill = GridBagConstraints.BOTH;
layout.weightx = 0.33;
layout.weighty = 1;
layout.gridx = 1;
layout.gridy = 0;
layout.gridwidth = 1;
layout.gridheight = 1;
panel2.add(calculateButton, layout);

最终输出：图像 3

您能告诉我如何配置所需的组件排列吗？

输入一个 JTable 单元格的值后，该单元格的值会复制到所有单元格

使用 GridBagLayout 布局管理器在 JFrame 中排列组件 [关闭]

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