Java Swing实战（三）文本组件JTextField和密码组件JPasswordField

接下来添加文本组件JTextField和密码组件JPasswordField。

/**

 * @author: lishuai

 * @date: 2018/11/26 13:51

 */

public class WeimingSyncApplets {

    public static void main(String[] args) {

        // 面板组件

        JPanel taskPanel = new JPanel();

        JPanel dbPanel = new JPanel();

        JTabbedPane tabbedPane = buildJTabbedPane(taskPanel, dbPanel);

        buildFrame(tabbedPane);

    }

    private static JTabbedPane buildJTabbedPane(JPanel taskPanel, JPanel dbPanel) {

        // 选项卡面板

        JTabbedPane tabbedPane = new JTabbedPane();

        // 通过BorderFactory来设置边框的特性

        tabbedPane.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));

        tabbedPane.add("执行任务", taskPanel);

        tabbedPane.add("数据源配置", dbPanel);

        // 下拉框

        dbPanel.add(buildJLabel("数据库类型", 10, 20, 80, 25));

        String dbs[] = {"mysql", "oracle", "sqlserver"};

        dbPanel.add(buildJComboBox("mysql", "mysql", dbs, 0, 100, 20, 165, 25));

        // 文本框

        dbPanel.add(buildJLabel("用户名", 10, 50, 80, 25));

        JTextField dbUserName = buildJTextField("dbUserName", "dbUserName", 20, 100, 50, 165, 25);

        dbPanel.add(dbUserName);

        // 密码

        dbPanel.add(buildJLabel("密码", 10, 80, 80, 25));

        JPasswordField dbPassWord = buildJPasswordField("dbPassWord", "dbPassWord", 20, 100, 80, 165, 25);

        dbPanel.add(dbPassWord);

        return tabbedPane;

    }

    private static JPasswordField buildJPasswordField(String defaultValue, String name, int columns, int x, int y, int width, int height) {

        JPasswordField jPasswordField = new JPasswordField(columns);

        jPasswordField.setText(defaultValue);

        jPasswordField.setName(name);

        jPasswordField.setBounds(x, y, width, height);

        return jPasswordField;

    }

    private static JTextField buildJTextField(String defaultValue, String name, int columns, int x, int y, int width, int height) {

        JTextField text = new JTextField(columns);

        text.setText(defaultValue);

        text.setName(name);

        text.setBounds(x, y, width, height);

        return text;

    }

    private static JComboBox buildJComboBox(Object selectedItem, String name, String[] elements, int selectedIndex, int x, int y, int width, int height) {

        DefaultComboBoxModel codeTypeModel = new DefaultComboBoxModel();

        // elements 下拉框中的选项

        for (String element : elements) {

            codeTypeModel.addElement(element);

        }

        JComboBox codeTypeBox = new JComboBox(codeTypeModel);

        codeTypeBox.setName(name);

        // 默认选中的下拉框选项

        codeTypeBox.setSelectedItem(selectedItem);

//        codeTypeBox.setSelectedItem(selectedIndex);

        codeTypeBox.setBounds(x, y, width, height);

        // 添加下拉框事件监听器

        codeTypeBox.addItemListener(new ItemListener() {

            @Override

            public void itemStateChanged(ItemEvent e) {

                if (e.getStateChange() == ItemEvent.SELECTED) {

                    // 选择的下拉框选项

                    System.out.println(e.getItem());

                }

            }

        });

        return codeTypeBox;

    }

    private static JLabel buildJLabel(String name, int x, int y, int width, int height) {

        JLabel label = new JLabel(name);

        label.setBounds(x, y, width, height);

        return label;

    }

    private static void buildFrame(JComponent component) {

        // 窗体容器

        JFrame frame = new JFrame("数据同步工具");

        frame.add(component);

        //  JFrame.EXIT_ON_CLOSE  退出

        //  JFrame.HIDE_ON_CLOSE  最小化隐藏

        frame.setDefaultCloseOperation(JFrame.HIDE_ON_CLOSE);

        // 设置布局

        frame.getContentPane().setLayout(new BorderLayout());

        frame.getContentPane().add(BorderLayout.CENTER, component);

        // 设置窗口最小尺寸

        frame.setMinimumSize(new Dimension(1060, 560));

        // 调整此窗口的大小，以适合其子组件的首选大小和布局

        frame.pack();

        // 设置窗口相对于指定组件的位置

        frame.setLocationRelativeTo(null);

        frame.setVisible(true);

        // 设置窗口尺寸是否固定不变

        frame.setResizable(true);

    }

}

效果如图：