javaswing编程？

Question

用java

设计一个图形用户界面。界面中包括三个标签、三个文本框和一个按钮。三个标 签分别是【商品1数量】、【商品2数量】、【总量】。按钮的标题为【计算总量】。要求在文本框中输入商品1数量、商品2数量，单击计算总量按钮后在文本框中显示总量。

Answer 1

用swing画窗体，加上几个组件。以及事件处理。 如有帮助，请采纳。

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JTextField;
public class SummationForm extends JFrame implements ActionListener {
    private static final long serialVersionUID = -3059616600875760053L;
    JLabel labMathematics, labEnglish, labTotal;
    JTextField textMathematics, textEnglish, textTotal;
    static JButton butSummation;
    public SummationForm() {
        labMathematics = new JLabel("商品数量1");
        labEnglish = new JLabel("商品数量2");
        labTotal = new JLabel("总量");
        textMathematics = new JTextField("", 10);
        textEnglish = new JTextField("", 10);
        textTotal = new JTextField("", 10);
        butSummation = new JButton("计算总量");
        labMathematics.setBounds(30, 30, 120, 30);
        textMathematics.setBounds(180, 30, 120, 30);
        labEnglish.setBounds(30, 80, 120, 30);
        textEnglish.setBounds(180, 80, 120, 30);
        labTotal.setBounds(30, 130, 120, 30);
        textTotal.setBounds(180, 130, 120, 30);
        butSummation.setBounds(160, 180, 120, 30);
        add(labMathematics);
        add(textMathematics);
        add(labEnglish);
        add(textEnglish);
        add(labTotal);
        add(textTotal);
        add(butSummation);
        setLayout(null);
        setBounds(200, 100, 400, 300);
        // 窗口在屏幕中间显示
        setLocationRelativeTo(null);
        setTitle("求总量");
        setResizable(false);
        setVisible(true);
    }

    public static void main(String[] args) {
        SummationForm summationForm = new SummationForm();
        butSummation.addActionListener(summationForm);
        summationForm.add(butSummation);
    }

    public void actionPerformed(ActionEvent e) {
        JButton jb = (JButton) e.getSource();
        if (jb == butSummation) {
            String Mathematics = textMathematics.getText();
            String English = textEnglish.getText();
            try {
                int a = Integer.parseInt(Mathematics);
                int b = Integer.parseInt(English);
                int t = a + b;
                textTotal.setText(String.valueOf(t));
            } catch (Exception e2) {
                JOptionPane.showMessageDialog(this, "输入的格式错误！", "提示对话框", JOptionPane.DEFAULT_OPTION);
            }
        }
    }
}