JavaSwing实战（四）按钮组件JButton及其事件监听

JavaSwing实战（四）按钮组件JButton及其事件监听接下来为⾯板添加保存按钮，并为按钮绑定事件监听。

/**
* @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);
// 添加按钮，并为按钮绑定事件监听
JButton saveButton = buildJButton("保存", 185, 230, 80, 25);
addActionListener(saveButton);
dbPanel.add(saveButton);
return tabbedPane;
}
private static void addActionListener(JButton saveButton) {
// 为按钮绑定监听器
saveButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// 对话框
JOptionPane.showMessageDialog(null, "保存成功！");
}
});
}
private static JButton buildJButton(String name, int x, int y, int width, int height) {
JButton button = new JButton(name);
button.setBounds(x, y, width, height);
return button;
}
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：。