1 // 设置布局管理器
 2         setLayout(new BorderLayout(15, 15));
 3
 4         JPanel menuPanel = new JPanel();
 5         JScrollPane  scrollPane = new JScrollPane();
 6         JPanel resultPanel = new JPanel();
 7
 8         jlTime.setForeground(Color.blue);
 9
10         timer = new Timer(1000, new ActionListener() {
11             public void actionPerformed(ActionEvent e) {
12                 Date now2 = new Date(now.getTime() + 1000);
13                 now = now2;
14                 SimpleDateFormat formatter = new SimpleDateFormat("HH:mm:ss");
15                 jlTime.setText("耗时：" + formatter.format(now));
16             }
17         });
18
19         resultPanel.setVisible(false);
20         addContToMenu(menuPanel, scrollPane, resultPanel);
21         addContToResult(resultPanel);
22
23         this.add(menuPanel, BorderLayout.NORTH);
24         this.add(scrollPane, BorderLayout.CENTER);
25         this.add(resultPanel, BorderLayout.SOUTH);
26
27     }

 1 // 将控件加入菜单面板
 2     private void addContToMenu(JPanel menuPanel, final JScrollPane scrollPane, final JPanel resultPanel) {
 3         JButton but1 = new JButton("提交");
 4         JPanel tfPanel1 = new JPanel();
 5         final JTextField tf1 = new JTextField("     ");
 6         tfPanel1.setLayout(new BorderLayout(5, 0));
 7         tfPanel1.add(new JLabel("请输入题目数量:"), BorderLayout.WEST);
 8         tfPanel1.add(tf1, BorderLayout.CENTER);
 9
10         JPanel tfPanel2 = new JPanel();
11         final JTextField tf2 = new JTextField("     ");
12         tfPanel2.setLayout(new BorderLayout(5, 0));
13         tfPanel2.add(new JLabel("请输入操作数的最大值:"), BorderLayout.WEST);
14         tfPanel2.add(tf2, BorderLayout.CENTER);
15
16         JPanel tfPanel3 = new JPanel();
17         final JTextField tf3 = new JTextField("     ");
18         tfPanel3.setLayout(new BorderLayout(5, 0));
19         tfPanel3.add(new JLabel("是否有乘除(1为是，0为否):"), BorderLayout.WEST);
20         tfPanel3.add(tf3, BorderLayout.CENTER);

 1 // 设置按钮监听，按钮主要做这几件事：1.开始计时 2.调用mainExp类生成题目，3.结果面板设为可见，4.数据初始化
 2         but1.addActionListener(new ActionListener() {
 3             public void actionPerformed(ActionEvent arg0) {
 4                 clearAll();
 5                 now.setHours(0);
 6                 now.setMinutes(0);
 7                 now.setSeconds(0);
 8                 timer.start();
 9                 // 获得生成的题目list，赋给question的list中
10                 mainExp createExercise = new mainExp();
11                 createExercise.createEquation(Integer.parseInt(tf1.getText().trim()),
12                         Integer.parseInt(tf2.getText().trim()),Integer.parseInt(tf3.getText().trim()));
13                 Command.this.setQuestion(createExercise.getQuestion());
14                 Command.this.setAnswer(createExercise.getAnswer());
15                 Command.this.addContToMain(scrollPane);
16                 resultPanel.setVisible(true);
17                 resultPanel.validate();
18
19             }
20         });
21         menuPanel.add(tfPanel1);
22         menuPanel.add(tfPanel2);
23         menuPanel.add(tfPanel3);
24         menuPanel.add(but1);
25         menuPanel.add(jlTime);
26
27     }