// create and position GUI components; register event handlers
private void createUserInterface() {
// get content pane for attaching GUI components
Container contentPane = getContentPane();
// enable explicit positioning of GUI components
contentPane.setLayout(null);
// set up principalJLabel
principalJLabel = new JLabel();
principalJLabel.setBounds(16, 16, 56, 24);
principalJLabel.setText("Principal:");
contentPane.add(principalJLabel);
// set up principalJTextField
principalJTextField = new JTextField();
principalJTextField.setBounds(100, 16, 100, 24);
principalJTextField.setHorizontalAlignment(JTextField.RIGHT);
contentPane.add(principalJTextField);
// set up interestRateJLabel
interestRateJLabel = new JLabel();
interestRateJLabel.setBounds(16, 56, 80, 24);
interestRateJLabel.setText("Interest rate:");
contentPane.add(interestRateJLabel);
// set up interestRateJTextField
interestRateJTextField = new JTextField();
interestRateJTextField.setBounds(100, 56, 100, 24);
interestRateJTextField.setHorizontalAlignment(JTextField.RIGHT);
contentPane.add(interestRateJTextField);
// set up yearsJLabel
yearsJLabel = new JLabel();
yearsJLabel.setBounds(16, 96, 48, 24);
yearsJLabel.setText("Years:");
contentPane.add(yearsJLabel);
// set up yearsJSpinner
yearsJSpinner = new JSpinner(new SpinnerNumberModel(1, 1, 10, 1));
yearsJSpinner.setBounds(100, 96, 100, 24);
contentPane.add(yearsJSpinner);
// set up yearlyBalanceJLabel
yearlyBalanceJLabel = new JLabel();
yearlyBalanceJLabel.setBounds(16, 136, 150, 24);
yearlyBalanceJLabel.setText("Yearly account balance:");
contentPane.add(yearlyBalanceJLabel);
// set up yearlyBalanceJTextArea
yearlyBalanceJTextArea = new JTextArea();
yearlyBalanceJTextArea.setEditable(false);
// set up yearlyBalanceJScrollPane
yearlyBalanceJScrollPane = new JScrollPane(yearlyBalanceJTextArea);
yearlyBalanceJScrollPane.setBounds(16, 160, 300, 92);
contentPane.add(yearlyBalanceJScrollPane);
// set up calculateJButton
calculateJButton = new JButton();
calculateJButton.setBounds(216, 16, 100, 24);
calculateJButton.setText("Calculate");
contentPane.add(calculateJButton);
calculateJButton.addActionListener(
new ActionListener() // anonymous inner class
{
// event handler called when calculateJButton is clicked
public void actionPerformed(ActionEvent event) {
calculateJButtonActionPerformed(event);
}
} // end anonymous inner class
); // end call to addActionListener
// set properties of application's window
setTitle("Interest Calculator"); // set title bar text
setSize(340, 296); // set window size
setVisible(true); // display window
} // end method createUserInterface
InputFrame() {
JPanel pane = new JPanel();
pane.setLayout(null);
pane.setBackground(Color.LIGHT_GRAY);
add(pane);
// JTextField文字欄位元件
lblName = new JLabel("姓名：");
lblName.setBounds(10, 10, 40, 20);
pane.add(lblName);
text0.setBounds(50, 10, 80, 20);
text0.addActionListener(textfield);
pane.add(text0);
// JSpinner數位序列元件
lblAge = new JLabel("年齡：");
lblAge.setBounds(170, 10, 40, 20);
pane.add(lblAge);
JSpinner spin = new JSpinner(new SpinnerNumberModel(20, 1, 100, 1));
spin.setBounds(210, 10, 80, 20);
spin.addChangeListener(spinner);
pane.add(spin);
// JRadioButton選項圓鈕元件
lblSex = new JLabel("性別：");
lblSex.setBounds(10, 40, 40, 20);
pane.add(lblSex);
ButtonGroup group = new ButtonGroup();
JRadioButton rb1 = new JRadioButton("帥哥", false);
rb1.setBounds(50, 40, 60, 20);
JRadioButton rb2 = new JRadioButton("美女", false);
rb2.setBounds(110, 40, 60, 20);
rb1.setOpaque(false);
rb2.setOpaque(false); // 秀出底色
rb1.addActionListener(radio);
rb2.addActionListener(radio);
group.add(rb1);
group.add(rb2);
pane.add(rb1);
pane.add(rb2);
// JCheckBox核對方塊元件
lblInter = new JLabel("興趣：");
lblInter.setBounds(10, 70, 50, 20);
pane.add(lblInter);
for (int i = 0; i < check.length; i++) {
check[i] = new JCheckBox(checkItem[i]);
check[i].setBounds(50 + 60 * i, 70, 60, 20);
check[i].setOpaque(false);
check[i].addActionListener(checkbox);
pane.add(check[i]);
}
// JComboBox下拉式清單元件
lblAcad = new JLabel("學歷：");
lblAcad.setBounds(10, 100, 50, 20);
pane.add(lblAcad);
String[] items_c = {"博士", "碩士", "大學", "高中", "國中", "國小"};
JComboBox c_box = new JComboBox(items_c);
c_box.setBounds(50, 100, 100, 20);
c_box.addItemListener(cbo);
pane.add(c_box);
// JList清單元件
lblPlace = new JLabel("居住地區：");
lblPlace.setBounds(170, 100, 70, 20);
pane.add(lblPlace);
String[] items_p = {
"台北", "桃園", "新竹", "苗栗", "台中", "彰化", "雲林", "嘉義", "台南", "高雄", "屏東", "花蓮", "台東", "澎湖"
};
JList list = new JList(items_p);
list.setVisibleRowCount(4);
list.addListSelectionListener(list_p);
JScrollPane scroll = new JScrollPane(list);
scroll.setBounds(240, 100, 80, 80);
pane.add(scroll);
// JTextArea文字區域元件
texta.setBounds(10, 190, 330, 40);
texta.setEditable(false);
pane.add(texta);
setTitle("輸入元件綜合應用");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(50, 50, 360, 280);
setVisible(true);
}