如何通过 JButton 将数据从一个类添加到另一个类的 JTable？答案

【问题标题】：How would I add the data from one class to another class' JTable, by JButton?如何通过 JButton 将数据从一个类添加到另一个类的 JTable？
【发布时间】：2015-03-25 15:32:54
【问题描述】：

我要做的是使用数组/数组列表存储来自用户的输入数据，然后将其显示在 JTable 上。我有两个用于 Jtable 的不同对话框/类和另一个用于用户输入的对话框，因此当他们单击 JButtonAdd 时，它将自动在另一个对话框/类上的 JTbale 上显示数据。我完全不知道该怎么做。这是我到目前为止提出的代码。

**MAIN Program**



import java.awt.EventQueue;

import javax.swing.JDialog;
import javax.swing.JButton;
import javax.swing.JOptionPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
import javax.swing.JScrollPane;

import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.Color;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;


public class StartProgram extends JDialog {
	private JTable tableInfo;

	/**
	 * Launch the application.
	 */
	public static void main(String[] args) {
		EventQueue.invokeLater(new Runnable() {
			public void run() {
				try {
					StartProgram dialog = new StartProgram();
					dialog.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
					dialog.setVisible(true);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		});
	}

	/**
	 * Create the dialog.
	 */
	@SuppressWarnings("serial")
	public StartProgram() {
		getContentPane().setBackground(new Color(153, 255, 153));
		setBounds(100, 100, 550, 500);
		getContentPane().setLayout(null);
		
		JButton btnDelete = new JButton("Delete");
		btnDelete.setBounds(379, 11, 145, 23);
		btnDelete.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent arg0) {
				JOptionPane.showConfirmDialog(null, "Are you sure you want to delete?");
			}
		});

		getContentPane().add(btnDelete);
		
		JButton btnAddQueueNumber = new JButton("Add Queue Number");
		btnAddQueueNumber.addMouseListener(new MouseAdapter() {
			@Override
			public void mouseClicked(MouseEvent arg0) {
				AddQueueNumber dialog = new AddQueueNumber();
				dialog.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
				dialog.setVisible(true);
			}
		});
		btnAddQueueNumber.setBounds(10, 11, 145, 23);
		getContentPane().add(btnAddQueueNumber);
		
		JScrollPane scrollPane = new JScrollPane();
		scrollPane.setBounds(10, 45, 514, 405);
		getContentPane().add(scrollPane);
		
		tableInfo = new JTable();
		tableInfo.setShowGrid(false);
		scrollPane.setViewportView(tableInfo);
		tableInfo.setModel(new DefaultTableModel(
			new Object[][] {
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
				{null, null, null, null, null},
			},
			new String[] {
				"Queue Number", "Name", "Interviewer", "Time", "Room"
			}
		) {
			boolean[] columnEditables = new boolean[] {
				false, false, false, false, false
			};
			public boolean isCellEditable(int row, int column) {
				return columnEditables[column];
			}
		});
		
		JButton btnSearch = new JButton("Search");
		btnSearch.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent arg0) {
				Search dialog = new Search();
				dialog.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
				dialog.setVisible(true);
			}
		});
		btnSearch.setBounds(164, 11, 145, 23);
		getContentPane().add(btnSearch);

	}
}

AddQueueNumber 类

import java.awt.BorderLayout;
import java.awt.FlowLayout;

import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import javax.swing.table.DefaultTableModel;

import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;

import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.JComboBox;
import javax.swing.DefaultComboBoxModel;

import java.awt.Color;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;


public class AddQueueNumber extends JDialog {

    private final JPanel contentPanel = new JPanel();
    private JTextField tfQueueNumber;
    private JTextField tfName;
    private JTextField tfInterviewer;
    private JTextField tfTime;

    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        try {
            AddQueueNumber dialog = new AddQueueNumber();
            dialog.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
            dialog.setVisible(true);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * Create the dialog.
     */
    public AddQueueNumber() {
        setBounds(100, 100, 270, 235);
        getContentPane().setLayout(new BorderLayout());
        contentPanel.setBackground(new Color(255, 255, 255));
        contentPanel.setBorder(new EmptyBorder(5, 5, 5, 5));
        getContentPane().add(contentPanel, BorderLayout.CENTER);
        contentPanel.setLayout(null);

        JLabel lblQueueNumber = new JLabel("Queue Number");
        lblQueueNumber.setBounds(10, 11, 93, 14);
        contentPanel.add(lblQueueNumber);

        tfQueueNumber = new JTextField();
        tfQueueNumber.setBounds(98, 8, 146, 20);
        contentPanel.add(tfQueueNumber);
        tfQueueNumber.setColumns(10);

        tfName = new JTextField();
        tfName.setBounds(98, 39, 146, 20);
        contentPanel.add(tfName);
        tfName.setColumns(10);

        JLabel lblName = new JLabel("Name");
        lblName.setBounds(10, 42, 78, 14);
        contentPanel.add(lblName);

        tfInterviewer = new JTextField();
        tfInterviewer.setBounds(98, 70, 146, 20);
        contentPanel.add(tfInterviewer);
        tfInterviewer.setColumns(10);

        JLabel lblInterviewer = new JLabel("Interviewer");
        lblInterviewer.setBounds(10, 73, 78, 14);
        contentPanel.add(lblInterviewer);

        tfTime = new JTextField();
        tfTime.setBounds(98, 101, 146, 20);
        contentPanel.add(tfTime);
        tfTime.setColumns(10);

        JLabel lblTime = new JLabel("Time");
        lblTime.setBounds(10, 104, 78, 14);
        contentPanel.add(lblTime);

        JComboBox cbRoom = new JComboBox();
        cbRoom.setModel(new DefaultComboBoxModel(new String[] {" ", "Circle Room", "Square Room", "Triangle Room", "Pentagon Room", "Rectangle Room"}));
        cbRoom.setBounds(98, 132, 146, 20);
        contentPanel.add(cbRoom);

        JLabel lblRoom = new JLabel("Room");
        lblRoom.setBounds(10, 135, 78, 14);
        contentPanel.add(lblRoom);
        {
            JPanel buttonPane = new JPanel();
            buttonPane.setBackground(new Color(255, 255, 255));
            buttonPane.setLayout(new FlowLayout(FlowLayout.RIGHT));
            getContentPane().add(buttonPane, BorderLayout.SOUTH);
            {
                JButton okButton = new JButton("OK");
                okButton.addMouseListener(new MouseListener() {

                    @Override
                    public void mouseReleased(MouseEvent e) {
                        // TODO Auto-generated method stub

                    }

                    @Override
                    public void mousePressed(MouseEvent e) {
                        // TODO Auto-generated method stub

                    }

                    @Override
                    public void mouseExited(MouseEvent e) {
                        // TODO Auto-generated method stub

                    }

                    @Override
                    public void mouseEntered(MouseEvent e) {
                        // TODO Auto-generated method stub

                    }

                    @Override
                    public void mouseClicked(MouseEvent e) {
                        //This is where the data will be saved on the JTable
                        JTable tableInfo = new JTable();
                        DefaultTableModel model = (DefaultTableModel) tableInfo.getModel();
                        if (!tfQueueNumber.getText().trim().equals ("")){
                        model.addRow(new Object[]{ tfQueueNumber.getText(), tfName.getText(),tfInterviewer.getText(), cbRoom.getSelectedItem().toString(),tfTime.getText() });
                        } else {
                            JOptionPane.showMessageDialog(null, "Queue number should not be blank!");
                        }
                    }
                });
                okButton.setActionCommand("Add");
                buttonPane.add(okButton);
                getRootPane().setDefaultButton(okButton);

            }
            {
                JButton cancelButton = new JButton("Cancel");
                cancelButton.addMouseListener(new MouseAdapter() {
                    @Override
                    public void mouseClicked(MouseEvent arg0) {
                        dispose();
                    }
                });
                cancelButton.setActionCommand("Cancel");
                buttonPane.add(cancelButton);
            }
        }



    }
}

【问题讨论】：

“我完全不知道该怎么做” 查看你的课程笔记和课文。 “需要很多帮助，因为我的教授不是一个好老师。:)” 是一个可怜的学生责怪老师。但无论如何，SO 不是招聘导师或提供一般帮助的地方。投票结束。
谢谢.. 我知道这有点太多了，但是自从我 3 个月前刚开始时，我对编程的了解较少，所以创建这个项目对我来说是压倒性的。谢谢和更多的力量..

标签： java swing arraylist jtable tablemodel

【解决方案1】：

首先定义一个普通的旧 Java 对象 (POJO)，它描述了您尝试捕获的数据...

public class Interview {

    private int queueNumber;
    private String name;
    private String interviewer;
    private Date time;
    private String room;

    public Interview(int queueNumber, String name, String interviewer, Date time, String room) {
        this.queueNumber = queueNumber;
        this.name = name;
        this.interviewer = interviewer;
        this.time = time;
        this.room = room;
    }

    public String getInterviewer() {
        return interviewer;
    }

    public String getName() {
        return name;
    }

    public int getQueueNumber() {
        return queueNumber;
    }

    public String getRoom() {
        return room;
    }

    public Date getTime() {
        return time;
    }

    public void setQueueNumber(int queueNumber) {
        this.queueNumber = queueNumber;
    }

    public void setName(String name) {
        this.name = name;
    }

    public void setInterviewer(String interviewer) {
        this.interviewer = interviewer;
    }

    public void setTime(Date time) {
        this.time = time;
    }

    public void setRoom(String room) {
        this.room = room;
    }



}

这将允许您将数据封装到易于管理的容器中。我个人更喜欢为此使用interfaces，因为它可以让我更好地控制要公开的内容和可用的功能，但我们会在这里保持简单......

创建一个JPanel，它可以充当采访细节的编辑...

public class InterviewPane extends JPanel {

    private JSpinner queueNumber;
    private JTextField name;
    private JTextField interviewer;
    private JSpinner time;
    private JComboBox room;

    private Interview interview;

    public InterviewPane(Interview interview) {
        this();
        this.interview = interview;
        if (interview != null) {
            queueNumber.setValue(interview.getQueueNumber());
            time.setValue(interview.getTime());
            name.setText(interview.getName());
            interviewer.setText(interview.getInterviewer());
            room.setSelectedItem(interview.getRoom());
        }
    }

    public InterviewPane() {
        queueNumber = new JSpinner();
        time = new JSpinner();
        SpinnerDateModel sm = new SpinnerDateModel(new Date(), null, null, Calendar.MINUTE);
        time = new JSpinner(sm);
        JSpinner.DateEditor de = new JSpinner.DateEditor(time, "hh:mm a");
        name = new JTextField(10);
        interviewer = new JTextField(10);
        room = new JComboBox();
        room.setModel(new DefaultComboBoxModel(new String[]{" ", "Circle Room", "Square Room", "Triangle Room", "Pentagon Room", "Rectangle Room"}));

        setLayout(new GridBagLayout());
        GridBagConstraints gbc = new GridBagConstraints();
        gbc.gridx = 0;
        gbc.gridy = 0;
        gbc.anchor = GridBagConstraints.WEST;
        add(new JLabel("Queue Number: "), gbc);
        gbc.gridy++;
        add(new JLabel("Name: "), gbc);
        gbc.gridy++;
        add(new JLabel("Interviewer: "), gbc);
        gbc.gridy++;
        add(new JLabel("Time: "), gbc);
        gbc.gridy++;
        add(new JLabel("Room: "), gbc);

        gbc.gridx++;
        gbc.gridy = 0;
        add(queueNumber, gbc);
        gbc.gridy++;
        add(name, gbc);
        gbc.gridy++;
        add(interviewer, gbc);
        gbc.gridy++;
        add(time, gbc);
        gbc.gridy++;
        add(room, gbc);
    }

    public Interview getInterview() {

        Interview result = interview;

        if (result == null) {
            result = new Interview(
                        (Integer)queueNumber.getValue(), 
                        name.getText(), 
                        interviewer.getText(), 
                        (Date)time.getValue(), 
                        (String)room.getSelectedItem());

        } else {

            interview.setInterviewer(interviewer.getText());
            interview.setName(name.getText());
            interview.setTime((Date) time.getValue());
            interview.setRoom((String) room.getSelectedItem());
            interview.setQueueNumber((int) queueNumber.getValue());

        }

        return result;

    }

}

这使您能够决定何时何地使用编辑器窗格，作为一般做法，您应避免直接从顶级容器扩展，如 JDialog

现在，当您想要显示编辑器时，您可以使用...

InterviewPane editor = new InterviewPane();
switch (JOptionPane.showConfirmationDialog(this, editor, "Details", JOptionPane.OK_CANCEL_OPTION)) {
    case JOptionPane.OK_OPTION:
        Interview interview = editor.getInterview();
        break;
}

这将允许您根据用户响应从编辑器中获取详细信息。

请注意，您可能希望使用AbstractTableModel 而不是DefaultTableModel，因为它更易于管理POJOs

看看：

了解更多详情。

您应该避免使用null 布局，像素完美布局是现代 UI 设计中的一种错觉。影响组件单个尺寸的因素太多，您无法控制。 Swing 旨在与核心的布局管理器一起工作，丢弃这些将导致无穷无尽的问题和问题，您将花费越来越多的时间来尝试纠正

更新

Swing 使用Model-View-Controller 范例的一个版本。这意味着 UI（视图）和数据（模型）之间存在分离。

这意味着，当您想要更改屏幕上的内容时，您只需要更改模型而不是整个 UI。

例如，在这种情况下，我将使用AbstractTableModel 来作为TableModel 的基础并提供我需要的功能（例如添加/删除Interview 对象的能力）。这使Interview 保持完整，并使其更易于管理

public class InterviewTableModel extends AbstractTableModel {

    protected static final String[] COLUMN_NAMES = {
        "Queue Number", "Name", "Interviewer", "Time", "Room"
    };

    protected static final Class[] COLUMN_TYPES = new Class[]{
        Integer.class, String.class, String.class, Date.class, String.class
    };

    private List<Interview> rows;

    public InterviewTableModel() {
        rows = new ArrayList<>(25);
    }

    public void addInterview(Interview interview) {
        rows.add(interview);
        int rowIndex = rows.size() - 1;
        fireTableRowsInserted(rowIndex, rowIndex);
    }

    public void removeInterview(Interview interview) {
        if (rows.contains(interview)) {
            int rowIndex = rows.indexOf(interview);
            rows.add(interview);
            fireTableRowsInserted(rowIndex, rowIndex);
        }
    }

    @Override
    public String getColumnName(int column) {
        return COLUMN_NAMES[column];
    }

    @Override
    public Class<?> getColumnClass(int columnIndex) {
        return COLUMN_TYPES[columnIndex];
    }

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

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

    @Override
    public Object getValueAt(int rowIndex, int columnIndex) {
        Interview interview = rows.get(rowIndex);
        Object value = null;
        switch (columnIndex) {
            case 0:
                value = interview.getQueueNumber();
                break;
            case 1:
                value = interview.getName();
                break;
            case 2:
                value = interview.getInterviewer();
                break;
            case 3:
                value = interview.getTime();
                break;
            case 4:
                value = interview.getRoom();
                break;
        }
        return value;
    }

}

因此，首先，您需要更改 tableInfo 的初始化方式，不再需要 DefaultTableModel，而是使用类似...

tableInfo.setModel(new InterviewTableModel());

当您想向模型添加新的Interview 时，您可以使用类似...

InterviewPane editor = new InterviewPane();
switch (JOptionPane.showConfirmationDialog(this, editor, "Details", JOptionPane.OK_CANCEL_OPTION)) {
    case JOptionPane.OK_OPTION:
        Interview interview = editor.getInterview();
        InterviewTableModel model = (InterviewTableModel)tableInfo.getModel();
        model.addInterview(interview);
        break;
}

例如...

【讨论】：

非常感谢您提供这些代码.. 我真的很感激。但是当我运行我的程序时，我在 : 开关 (JOptionPane.showConfirmDialog(this, editor, "Details", JOptionPane.OK_CANCEL_OPTION) 上出现错误，它说 showConfirmDialog 是一个错误.. :)
顺便说一句.. 我拥有的代码都是通过使用我安装的 Window Builder 自动生成的。我认为这样会更容易。 :)
"..通过使用我安装的Window Builder自动生成。我认为这样会更容易.." GUI设计师可以很好地使用在手中已经了解组件如何工作以及如何布置它们的专业人士。对于新手来说，它只会妨碍理解，使他们不愿意或无法调整魔法生成的代码以适应他们的需要。暂时把它们放在一边……
@AngelfromSky 据我所知，它应该可以工作。什么错误？
对不起..我的错误..我的下一个问题是..我需要删除我当前的 JTable 并创建一个新的..我该怎么做？