Java 尝试使用DefaultTableModel将数据动态添加到JTable,但无效

Java 尝试使用DefaultTableModel将数据动态添加到JTable,但无效,java,swing,jpanel,defaulttablemodel,Java,Swing,Jpanel,Defaulttablemodel,我尝试使用DefaultTableModel动态地向JTable添加数据,但它不起作用 我创建了两个类:一个类(Input.java)表示一个弹出窗口,允许您编写数据(名称、选项和约束)并保存它。另一个类表示包含一个表(InputMain.java)的弹出窗口。然后,InputMain将这些信息(如果收到)转换为表中的一行,该行在三列中列出所有信息。在Input中,我创建了一个InputMain实例,并将表的模型设置为一个新的DefaultTableModel()(如果我不这样做,它将抛出一个错

我尝试使用DefaultTableModel动态地向JTable添加数据,但它不起作用

我创建了两个类:一个类(Input.java)表示一个弹出窗口,允许您编写数据(名称、选项和约束)并保存它。另一个类表示包含一个表(InputMain.java)的弹出窗口。然后,InputMain将这些信息(如果收到)转换为表中的一行,该行在三列中列出所有信息。在Input中,我创建了一个InputMain实例,并将表的模型设置为一个新的DefaultTableModel()(如果我不这样做,它将抛出一个错误)(在InputMain中已经创建了一个表,因此如果我创建了InputMain实例,我可能正在调用InputMain中的表)。然后,根据actionPerformed(ActionEvent e),在JPanel中单击“回车”按钮后,它将创建一个新的数据数组,其中包含nameText、optionText和constraintText。最后,数据将被添加到模型中

我不知道为什么我不能将所有这些数据添加到表中,除了上面的方法听起来合乎逻辑之外

以下是InputMain.java类:

    package com.company;

    import javax.swing.*;
    import java.awt.*;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;

/**
 * Created by paull on 14/5/2016.
 */
public class InputMain {
    JButton add;
    JButton change;
    JButton delete;
    JTable table;
    String[] columns;
    String[][] data;
    JButton create;
    JPanel labelPanel;
    JPanel bigPanel;
    JPanel centerPanel;

    public InputMain() {
        int fontSize = 50;
        add = new JButton("add");
        change = new JButton("change");
        delete = new JButton("delete");
        create = new JButton("create");
        columns = new String[]{"name","option","constraint"};
        data = new String[][]{{"","",""}};

        table = new JTable(data,columns) {
            @Override
            public boolean isCellEditable(int row, int column) {
                return false; //to avoid it from being changable by double clicking any data
            }
        };
        table.setPreferredScrollableViewportSize(new Dimension(450,63));
        table.setFillsViewportHeight(true);

        JScrollPane jsp = new JScrollPane(table); // not always can the table be fully shown --> add a scrollbar


        add.setFont(new Font(add.getName(),Font.PLAIN,fontSize));
        change.setFont(new Font(add.getName(),Font.PLAIN,fontSize));
        delete.setFont(new Font(add.getName(),Font.PLAIN,fontSize));
        create.setFont(new Font(add.getName(),Font.PLAIN,fontSize));
        table.setFont(new Font(table.getName(),Font.PLAIN,fontSize));
        //table.getEditorComponent().setFont(new Font(add.getName(),Font.PLAIN,fontSize));
        table.getTableHeader().setFont(new Font(table.getName(),Font.PLAIN,fontSize));

        labelPanel = new JPanel();
        labelPanel.add(add);
        labelPanel.add(change);
        labelPanel.add(delete);
        labelPanel.setLayout(new FlowLayout(10,30,10));

        centerPanel = new JPanel();
        centerPanel.add(labelPanel);
        centerPanel.setLayout(new GridBagLayout());

        bigPanel = new JPanel();
        bigPanel.setLayout(new GridLayout(3,0));
        bigPanel.add(centerPanel);
        bigPanel.add(jsp);
        bigPanel.add(create);

        add.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                InputFrame s = new InputFrame();
                Input i = new Input();
                s.add(i.labelPanel);
                s.setVisible(true);
            }
        }); // pressing add button pops up the Input Frame

    }

}
package com.company;
import javax.swing.*;
import javax.swing.table.DefaultTableModel;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

/**
 * Created by paull on 14/5/2016.
 */
public class Input extends JPanel{

    JLabel nameLabel;
    JLabel optionLabel;
    JLabel constraintLabel;
    JButton enter;
    JPanel labelPanel;
    JPanel jp2;
    JPanel jp3;
    JPanel jp4;
    JTextField nameText;
    String[] optionStrings;
    JComboBox<String> optionText;
    JCheckBox wk1;
    JCheckBox wk2;
    JCheckBox wk3;
    JCheckBox wk4;
    JCheckBox wk5;


    public Input() {
        nameLabel = new JLabel("name: ");
        optionLabel = new JLabel("option: ");
        constraintLabel = new JLabel("constraint:");
        enter = new JButton("add");
        nameText = new JTextField(10);
        Options c = new Options();
        optionStrings = new String[]{c.satNight,c.sunEight,c.sunNineThirty,c.sunEleven,c.sunNight};
        optionText = new JComboBox<String>(optionStrings);
        wk1 = new JCheckBox("1");
        wk2 = new JCheckBox("2");
        wk3 = new JCheckBox("3");
        wk4 = new JCheckBox("4");
        wk5 = new JCheckBox("5");


        int fontSize = 50;
        nameLabel.setFont(new Font(nameLabel.getName(),Font.PLAIN,fontSize));
        optionLabel.setFont(new Font(nameLabel.getName(),Font.PLAIN,fontSize));
        constraintLabel.setFont(new Font(nameLabel.getName(),Font.PLAIN,fontSize));
        enter.setFont(new Font(nameLabel.getName(),Font.PLAIN,fontSize));
        nameText.setFont(new Font(nameLabel.getName(),Font.PLAIN,fontSize));
        optionText.setFont(new Font(nameLabel.getName(),Font.PLAIN,fontSize));
        wk1.setFont(new Font(nameLabel.getName(),Font.PLAIN,fontSize));
        wk2.setFont(new Font(nameLabel.getName(),Font.PLAIN,fontSize));
        wk3.setFont(new Font(nameLabel.getName(),Font.PLAIN,fontSize));
        wk4.setFont(new Font(nameLabel.getName(),Font.PLAIN,fontSize));
        wk5.setFont(new Font(nameLabel.getName(),Font.PLAIN,fontSize));

        labelPanel = new JPanel();
        labelPanel.add(nameLabel);
        labelPanel.add(nameText);
        labelPanel.add(optionLabel);
        labelPanel.add(optionText);
        labelPanel.add(constraintLabel);
        labelPanel.add(wk1);
        labelPanel.add(wk2);
        labelPanel.add(wk3);
        labelPanel.add(wk4);
        labelPanel.add(wk5);
        labelPanel.add(enter);
        labelPanel.setLayout(new FlowLayout(10,30,10));


        InputMain i = new InputMain();
        i.table.setModel(new DefaultTableModel());
        DefaultTableModel model = (DefaultTableModel) i.table.getModel();

        enter.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                String constraintText = "";
                String[] data = new String[]{nameText.getText(),optionText.getSelectedItem().toString(),constraintText};
                model.addRow(data);

                nameText.setText("");

            }
        });

    }


}
下面是Input.java类:

    package com.company;

    import javax.swing.*;
    import java.awt.*;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;

/**
 * Created by paull on 14/5/2016.
 */
public class InputMain {
    JButton add;
    JButton change;
    JButton delete;
    JTable table;
    String[] columns;
    String[][] data;
    JButton create;
    JPanel labelPanel;
    JPanel bigPanel;
    JPanel centerPanel;

    public InputMain() {
        int fontSize = 50;
        add = new JButton("add");
        change = new JButton("change");
        delete = new JButton("delete");
        create = new JButton("create");
        columns = new String[]{"name","option","constraint"};
        data = new String[][]{{"","",""}};

        table = new JTable(data,columns) {
            @Override
            public boolean isCellEditable(int row, int column) {
                return false; //to avoid it from being changable by double clicking any data
            }
        };
        table.setPreferredScrollableViewportSize(new Dimension(450,63));
        table.setFillsViewportHeight(true);

        JScrollPane jsp = new JScrollPane(table); // not always can the table be fully shown --> add a scrollbar


        add.setFont(new Font(add.getName(),Font.PLAIN,fontSize));
        change.setFont(new Font(add.getName(),Font.PLAIN,fontSize));
        delete.setFont(new Font(add.getName(),Font.PLAIN,fontSize));
        create.setFont(new Font(add.getName(),Font.PLAIN,fontSize));
        table.setFont(new Font(table.getName(),Font.PLAIN,fontSize));
        //table.getEditorComponent().setFont(new Font(add.getName(),Font.PLAIN,fontSize));
        table.getTableHeader().setFont(new Font(table.getName(),Font.PLAIN,fontSize));

        labelPanel = new JPanel();
        labelPanel.add(add);
        labelPanel.add(change);
        labelPanel.add(delete);
        labelPanel.setLayout(new FlowLayout(10,30,10));

        centerPanel = new JPanel();
        centerPanel.add(labelPanel);
        centerPanel.setLayout(new GridBagLayout());

        bigPanel = new JPanel();
        bigPanel.setLayout(new GridLayout(3,0));
        bigPanel.add(centerPanel);
        bigPanel.add(jsp);
        bigPanel.add(create);

        add.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                InputFrame s = new InputFrame();
                Input i = new Input();
                s.add(i.labelPanel);
                s.setVisible(true);
            }
        }); // pressing add button pops up the Input Frame

    }

}
package com.company;
import javax.swing.*;
import javax.swing.table.DefaultTableModel;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

/**
 * Created by paull on 14/5/2016.
 */
public class Input extends JPanel{

    JLabel nameLabel;
    JLabel optionLabel;
    JLabel constraintLabel;
    JButton enter;
    JPanel labelPanel;
    JPanel jp2;
    JPanel jp3;
    JPanel jp4;
    JTextField nameText;
    String[] optionStrings;
    JComboBox<String> optionText;
    JCheckBox wk1;
    JCheckBox wk2;
    JCheckBox wk3;
    JCheckBox wk4;
    JCheckBox wk5;


    public Input() {
        nameLabel = new JLabel("name: ");
        optionLabel = new JLabel("option: ");
        constraintLabel = new JLabel("constraint:");
        enter = new JButton("add");
        nameText = new JTextField(10);
        Options c = new Options();
        optionStrings = new String[]{c.satNight,c.sunEight,c.sunNineThirty,c.sunEleven,c.sunNight};
        optionText = new JComboBox<String>(optionStrings);
        wk1 = new JCheckBox("1");
        wk2 = new JCheckBox("2");
        wk3 = new JCheckBox("3");
        wk4 = new JCheckBox("4");
        wk5 = new JCheckBox("5");


        int fontSize = 50;
        nameLabel.setFont(new Font(nameLabel.getName(),Font.PLAIN,fontSize));
        optionLabel.setFont(new Font(nameLabel.getName(),Font.PLAIN,fontSize));
        constraintLabel.setFont(new Font(nameLabel.getName(),Font.PLAIN,fontSize));
        enter.setFont(new Font(nameLabel.getName(),Font.PLAIN,fontSize));
        nameText.setFont(new Font(nameLabel.getName(),Font.PLAIN,fontSize));
        optionText.setFont(new Font(nameLabel.getName(),Font.PLAIN,fontSize));
        wk1.setFont(new Font(nameLabel.getName(),Font.PLAIN,fontSize));
        wk2.setFont(new Font(nameLabel.getName(),Font.PLAIN,fontSize));
        wk3.setFont(new Font(nameLabel.getName(),Font.PLAIN,fontSize));
        wk4.setFont(new Font(nameLabel.getName(),Font.PLAIN,fontSize));
        wk5.setFont(new Font(nameLabel.getName(),Font.PLAIN,fontSize));

        labelPanel = new JPanel();
        labelPanel.add(nameLabel);
        labelPanel.add(nameText);
        labelPanel.add(optionLabel);
        labelPanel.add(optionText);
        labelPanel.add(constraintLabel);
        labelPanel.add(wk1);
        labelPanel.add(wk2);
        labelPanel.add(wk3);
        labelPanel.add(wk4);
        labelPanel.add(wk5);
        labelPanel.add(enter);
        labelPanel.setLayout(new FlowLayout(10,30,10));


        InputMain i = new InputMain();
        i.table.setModel(new DefaultTableModel());
        DefaultTableModel model = (DefaultTableModel) i.table.getModel();

        enter.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                String constraintText = "";
                String[] data = new String[]{nameText.getText(),optionText.getSelectedItem().toString(),constraintText};
                model.addRow(data);

                nameText.setText("");

            }
        });

    }


}
package.com公司;
导入javax.swing.*;
导入javax.swing.table.DefaultTableModel;
导入java.awt.*;
导入java.awt.event.ActionEvent;
导入java.awt.event.ActionListener;
/**
*paull于2016年5月14日创建。
*/
公共类输入扩展了JPanel{
JLabel名称标签;
JLabel optionLabel;
JLabel约束标签;
按回车键;
JPanel labelPanel;
JPanel jp2;
JPanel jp3;
JPanel jp4;
JTextField nameText;
字符串[]选项字符串;
JComboBox optionText;
JCheckBox wk1;
JCheckBox wk2;
JCheckBox wk3;
JCheckBox wk4;
JCheckBox wk5;
公共投入(){
nameLabel=新的JLabel(“名称:”);
optionLabel=新的JLabel(“选项:”);
constraintLabel=新的JLabel(“约束:”);
输入=新按钮(“添加”);
nameText=新的JTextField(10);
选项c=新选项();
optionString=newstring[]{c.satNight,c.sunEight,c.sunNineThirty,c.sunEleven,c.sunNight};
optionText=新的JComboBox(OptionString);
wk1=新的JCheckBox(“1”);
wk2=新的JCheckBox(“2”);
wk3=新的JCheckBox(“3”);
wk4=新的JCheckBox(“4”);
wk5=新的JCheckBox(“5”);
int fontSize=50;
setFont(新字体(namelab.getName(),Font.PLAIN,fontSize));
optionLabel.setFont(新字体(namelab.getName(),Font.PLAIN,fontSize));
constraintLabel.setFont(新字体(namelab.getName(),Font.PLAIN,fontSize));
输入.setFont(新字体(namelab.getName(),Font.PLAIN,fontSize));
setFont(新字体(namelab.getName(),Font.PLAIN,fontSize));
setFont(新字体(namelab.getName(),Font.PLAIN,fontSize));
wk1.setFont(新字体(namelab.getName(),Font.PLAIN,fontSize));
wk2.setFont(新字体(namelab.getName(),Font.PLAIN,fontSize));
wk3.setFont(新字体(namelab.getName(),Font.PLAIN,fontSize));
wk4.setFont(新字体(namelab.getName(),Font.PLAIN,fontSize));
wk5.setFont(新字体(namelab.getName(),Font.PLAIN,fontSize));
labelPanel=新的JPanel();
添加(名称标签);
labelPanel.add(nameText);
labelPanel.add(可选标签);
labelPanel.add(optionText);
labelPanel.add(constraintLabel);
labelPanel.add(wk1);
labelPanel.add(wk2);
添加标签面板(wk3);
添加标签面板(wk4);
添加标签面板(wk5);
labelPanel.add(输入);
labelPanel.setLayout(新的FlowLayout(10,30,10));
InputMain i=新的InputMain();
i、 table.setModel(新的DefaultTableModel());
DefaultTableModel=(DefaultTableModel)i.table.getModel();
enter.addActionListener(新ActionListener(){
@凌驾
已执行的公共无效操作(操作事件e){
字符串constraintText=“”;
字符串[]数据=新字符串[]{nameText.getText(),optionText.getSelectedItem().toString(),constraintText};
model.addRow(数据);
nameText.setText(“”);
}
});
}
}

提前感谢。

我认为问题在于InputMain执行的操作

       add.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                InputFrame s = new InputFrame();
                Input i = new Input();
                s.add(i.labelPanel);
                s.setVisible(true);
            }
        });
您可以构造
输入的新实例。这意味着您将创建一个新的空DefaultTableModel,并在每次单击add按钮时将其附加到表中。尝试将输入的构造移到操作之外,执行如下操作:

         Input i = new Input();
         add.addActionListener(new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                    InputFrame s = new InputFrame();                    
                    s.add(i.labelPanel);
                    s.setVisible(true);
                }
更新 当然,Input内部的InputMain实例化也应该删除。而是在Input中使用InputMain类型的成员:

private InputMain inputMain;
并更改输入的构造函数以设置值:

public Input (InputMain inputMain) {
    this.inputMain = inputMain;
    ...
并将InputMain中输入的实例化更改为

Input i = new Input(this);

非常感谢。然而,它正在抱怨StackOverflower错误。