如何将数据添加到 JTable？答案

【问题标题】：How would I add data to a JTable?如何将数据添加到 JTable？
【发布时间】：2014-05-31 11:34:48
【问题描述】：

我希望我的用户能够输入允许他们填充 JTable 的 4 个字段。我在CreateFxitures 类中有一个JPanel。在这个 JPanel 上，他们可以将数据输入到两个 ComboBox 和 2 个 TextField 中。一旦这些数据全部输入，他们应该单击Create 按钮，这会将所有数据添加到输入到表中的rowNames 数组中。但是，当他们单击 Create 时，该行会创建一个新行，但不会添加数据。我该怎么做呢？

主类：

import java.awt.CardLayout;
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;

import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.ListSelectionModel;
import javax.swing.SwingUtilities;

import org.omg.CORBA.PUBLIC_MEMBER;

public class Main 
{

    public Main()
    {
        final JFrame window = new JFrame ("AQA Computer Science Application");

        final CardLayout c1 = new CardLayout();
        final JPanel container = new JPanel(c1);

        Home homeCall = new Home();
        GuestFixtures guestCall = new GuestFixtures();
        final Login loginCall = new Login();
        final AdminFixtures adminCall = new AdminFixtures();
        final CreateFixtures createCall = new CreateFixtures();

        container.add(homeCall, "1");
        container.add(guestCall, "2");
        container.add(loginCall, "3");
        container.add(adminCall, "4");
        container.add(createCall, "5");
        createCall.createB.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent ae) {

                if (createCall.descTF.getText().equals("")){
                    JOptionPane.showMessageDialog(null, "All fields must be entered");
                }else{
                    c1.show(container, "4");

                    adminCall.model.addRow(createCall.rowData);

                }

            }
        });

    }

    public static void main(String args[])
    {
        SwingUtilities.invokeLater(new Runnable()
        {
            @Override
            public void run()
            {
                new Main();
            }
        });

    }

}

创建夹具：

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Vector;

import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;

public class CreateFixtures extends JPanel
{

    JButton backB, createB;
    JLabel typeL, descL, dateL, resultL;
    JComboBox typeCB, monthCB, dayCB;
    JTextField descTF, resultTF;
    String[] typeCBSTR = { "Football", "Tennis", "Swimming"};
    String[] monthCBSTR = { "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"};
    String[] dayINT = {"1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23", "24", "25", "26", "27", "28", "29", "30", "31", };
    Object typeObject, monthObject;
    String typeSTR, descSTR, monthSTR, resultSTR;
    protected Vector rowData;
    public CreateFixtures()
    {

        final AdminFixtures adminCall = new AdminFixtures();

        this.setLayout(new BorderLayout());

        JPanel createC = new JPanel(new GridLayout(12, 4));
        typeL = new JLabel("Type of Sport");
        typeCB = new JComboBox(typeCBSTR);
        descL = new JLabel("Description");
        descTF = new JTextField();
        dateL = new JLabel("Date");
        monthCB = new JComboBox(monthCBSTR);
        dayCB = new JComboBox(dayINT);
        resultL = new JLabel("Result");
        resultTF = new JTextField("TBA");

        createC.add(typeL);
        createC.add(typeCB);
        createC.add(descL);
        createC.add(descTF);
        createC.add(dateL);
        createC.add(monthCB);
        createC.add(dayCB);
        createC.add(resultL);
        createC.add(resultTF);

        typeObject = typeCB.getSelectedItem();
        typeSTR = typeObject.toString();
        descSTR = descTF.getText();
        monthObject = monthCB.getSelectedItem();
        resultSTR = resultTF.getText();

        Object[] rowData = {typeSTR, descSTR, monthSTR, resultTF};

        JPanel createS = new JPanel(new FlowLayout());
        backB = new JButton("Back");
        createB = new JButton("Create");

        createS.add(backB);
        createS.add(createB);

        createC.setBackground(Color.LIGHT_GRAY);
        createS.setBackground(Color.GRAY);

        add(createC, BorderLayout.CENTER);
        add(createS, BorderLayout.SOUTH);


    }

}

AdminFixtures：

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

import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;

public class AdminFixtures extends JPanel
{

    JButton backB, createFixturesB, deleteButton;
    JTable adminFixturesTable;
    String[] columnNames = {"Fixture", "Description", "Date", "Result"};
    String[][] rowNames = null;
    DefaultTableModel model;

    public AdminFixtures()
    {

        this.setLayout(new BorderLayout());

        JPanel adminC = new JPanel();
        adminFixturesTable = new JTable(new DefaultTableModel(rowNames, columnNames));
        JScrollPane scrollpane = new JScrollPane(adminFixturesTable);
        model = (DefaultTableModel) adminFixturesTable.getModel();

        JPanel adminS = new JPanel(new FlowLayout());
        backB = new JButton("Back");
        createFixturesB = new JButton("New Fixture");
        deleteButton = new JButton("Delete Row");

        adminS.add(backB);
        adminS.add(createFixturesB);
        adminS.add(deleteButton);

        adminC.setBackground(Color.LIGHT_GRAY);
        adminS.setBackground(Color.GRAY);

        add(scrollpane, BorderLayout.CENTER);
        add(adminS, BorderLayout.SOUTH);

    }

}

【问题讨论】：

你的设计似乎很奇怪。您从Main 类内部将侦听器添加到CreateFixtures 的组件，同时引用在Main 类中创建的新AdminFixtures，以尝试更改CreateFixtures 中的AdminFixtures .这似乎是你的问题。设计你的程序。应该在 that 类中添加一个类的监听器
基本上，我有MAIN，其中包含主 JPanel 并调用其他卡（类）。每个类都是一个使用 CardLayout 的新 JPanel，当它想要显示时由 MAIN 调用。这不是关于听众的问题，因为我在Main 中有许多其他听众，他们没有造成任何问题。
CreateFixtures 中的按钮也是 supposed 添加一行，而不是 its AdminFixtures 模型，而是 AdminFixtures您在Main? 中创建的模型？
为了尽快获得更好的帮助，请发布MCVE（最小完整且可验证的示例）。
我不知道我在Main 中创建了一个模型。基本上，Main 中的 Listener 应该向 Admin Fixtures 中的模型添加一个新行，并将来自CreateFxitures 的数据添加到该行中。

标签： java swing jtable defaulttablemodel

【解决方案1】：

首先使用getText() 获取字段值。然后从值创建一个对象数组。然后像你一样使用addRow(array)。您当前尝试添加的数组包含所有空值。因此，您只需要获取文本字段的当前值，然后添加行。忘记createCall.rowData。它对你没有任何作用。每次按下按钮时创建一个新的Object[]。类似的东西

String data1 = typeSTR.getText();
String data2 = descSTR.getText();
String data3 = monthSTR.getText();
String data4 = resultSTR.getText();
Object[] row = { data1, data2, data3, data4 };
model.addRow( row );

【讨论】：