Java 将值从jtext传递到另一帧

我得写一个出纳程序。假设，如果我有一个包含2个JTextFields的JFrame，则添加项目种类和价格。我有一个JButton，当我按下JButton时，如果我想让用户添加的条目与新JFrame中名为Sell的JButton相似，那么就创建一个JButton，JButton将把price和item kind的值传递给JTable。有没有办法做到这一点

从数据库中获取项目的代码，但结果是JTable，但我不知道创建JButton的代码

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这个问题的要求还不清楚，不过如果你能对它有更多的了解，那么我们中的许多人就能在这个话题上帮助你。借助于，以防万一英语不是你喜欢的语言

如果我正确理解了这个问题，您需要在两个字段中输入两个值，ITEM和PRICE。现在，单击JButton，您希望将这些项传递给JTable。如果是这样的话，下面是一个供您帮助的小程序：

import java.awt.*;
import java.awt.event.*;
import java.text.NumberFormat;
import java.util.Vector;
import javax.swing.*;
import javax.swing.table.DefaultTableModel;

public class JTableExample {

    private JFrame frame;
    private JTextField itemTField;
    private JFormattedTextField priceFTField;
    private NumberFormat priceFormat;
    private JButton submitButton;

    private Vector<String> columnNames = new Vector<String>();
    private JDialog sellingDialog;
    private JTable table;
    private DefaultTableModel model;

    private ActionListener buttonAction = new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent ae) {
            if (!sellingDialog.isShowing()) {
                model.setRowCount(0);
                sellingDialog.setVisible(true);
            }
            Vector<Object> rowData = new Vector<Object>(2);
            String item = itemTField.getText().trim();
            double price = Double.parseDouble(
                            priceFTField.getText().trim());
            rowData.add(item);
            rowData.add(new Double(price));
            model.addRow(rowData);
        }
    };

    public JTableExample() {
        columnNames.add("Item");
        columnNames.add("Price");
    }

    private void displayGUI() {
        frame = new JFrame("Swing Worker Example");
        frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

        JPanel contentPane = new JPanel(new GridLayout(2, 1, 5, 5));

        JPanel headerPanel = new JPanel();
        itemTField = new JTextField(10);
        priceFormat = NumberFormat.getInstance();
        priceFormat.setMaximumFractionDigits(2);
        priceFTField = new JFormattedTextField(priceFormat);
        priceFTField.setColumns(10);
        headerPanel.add(itemTField);
        headerPanel.add(priceFTField);

        JPanel footerPanel = new JPanel();
        submitButton = new JButton("SUBMIT");
        submitButton.addActionListener(buttonAction);
        footerPanel.add(submitButton);

        contentPane.add(headerPanel);
        contentPane.add(footerPanel);

        frame.setContentPane(contentPane);
        frame.pack();
        frame.setLocationByPlatform(true);
        frame.setVisible(true);

        createDialog();
    }

    private void createDialog() {
        sellingDialog = new JDialog(frame, "Sell Items: ", false);
        JPanel contentPane = new JPanel(new BorderLayout(5, 5));
        model = new DefaultTableModel();
        model.setColumnIdentifiers(columnNames);
        table = new JTable(model);
        table.setPreferredScrollableViewportSize(
                                    new Dimension(200, 200));
        table.setFillsViewportHeight(true);
        JScrollPane itemScroller = new JScrollPane();
        itemScroller.setViewportView(table);
        contentPane.add(itemScroller);

        sellingDialog.setContentPane(contentPane);
        sellingDialog.pack();
    }

    public static void main(String[] args) {
        Runnable runnable = new Runnable() {
            @Override
            public void run() {
                new JTableExample().displayGUI();
            }
        };
        EventQueue.invokeLater(runnable);
    }
}

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不过，在一个单独的应用程序中，请考虑浏览已经发表在评论中的链接。totalpay=价格+totalpay++行数；应该是SQL server的作业，此值应该从语句返回您应该在此论坛中使用图形正确的英语而不是SMS语言来回答您的问题。请参阅catch Exception e{//ignore}更改catch Exception e{..形式的代码以捕获异常e{e.printStackTrace；//信息量很大！。OP似乎已经放弃了这一点，所以投票决定关闭。

import java.awt.*;
import java.awt.event.*;
import java.text.NumberFormat;
import java.util.Vector;
import javax.swing.*;
import javax.swing.table.DefaultTableModel;

public class JTableExample {

    private JFrame frame;
    private JTextField itemTField;
    private JFormattedTextField priceFTField;
    private NumberFormat priceFormat;
    private JButton submitButton;

    private Vector<String> columnNames = new Vector<String>();
    private JDialog sellingDialog;
    private JTable table;
    private DefaultTableModel model;

    private ActionListener buttonAction = new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent ae) {
            if (!sellingDialog.isShowing()) {
                model.setRowCount(0);
                sellingDialog.setVisible(true);
            }
            Vector<Object> rowData = new Vector<Object>(2);
            String item = itemTField.getText().trim();
            double price = Double.parseDouble(
                            priceFTField.getText().trim());
            rowData.add(item);
            rowData.add(new Double(price));
            model.addRow(rowData);
        }
    };

    public JTableExample() {
        columnNames.add("Item");
        columnNames.add("Price");
    }

    private void displayGUI() {
        frame = new JFrame("Swing Worker Example");
        frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

        JPanel contentPane = new JPanel(new GridLayout(2, 1, 5, 5));

        JPanel headerPanel = new JPanel();
        itemTField = new JTextField(10);
        priceFormat = NumberFormat.getInstance();
        priceFormat.setMaximumFractionDigits(2);
        priceFTField = new JFormattedTextField(priceFormat);
        priceFTField.setColumns(10);
        headerPanel.add(itemTField);
        headerPanel.add(priceFTField);

        JPanel footerPanel = new JPanel();
        submitButton = new JButton("SUBMIT");
        submitButton.addActionListener(buttonAction);
        footerPanel.add(submitButton);

        contentPane.add(headerPanel);
        contentPane.add(footerPanel);

        frame.setContentPane(contentPane);
        frame.pack();
        frame.setLocationByPlatform(true);
        frame.setVisible(true);

        createDialog();
    }

    private void createDialog() {
        sellingDialog = new JDialog(frame, "Sell Items: ", false);
        JPanel contentPane = new JPanel(new BorderLayout(5, 5));
        model = new DefaultTableModel();
        model.setColumnIdentifiers(columnNames);
        table = new JTable(model);
        table.setPreferredScrollableViewportSize(
                                    new Dimension(200, 200));
        table.setFillsViewportHeight(true);
        JScrollPane itemScroller = new JScrollPane();
        itemScroller.setViewportView(table);
        contentPane.add(itemScroller);

        sellingDialog.setContentPane(contentPane);
        sellingDialog.pack();
    }

    public static void main(String[] args) {
        Runnable runnable = new Runnable() {
            @Override
            public void run() {
                new JTableExample().displayGUI();
            }
        };
        EventQueue.invokeLater(runnable);
    }
}