Java 核心技术 第八版源代码【Core Java. Volume II. Advanced Features, 8th Ed...

import java.awt.*; import java.awt.event.*; import java.awt.geom.*; import java.util.*; import java.text.*; import javax.swing.*; /** * This applet shows a retirement calculator. The UI is displayed in English, German, and Chinese. * @version 1.22 2007-07-25 * @author Cay Horstmann */ public class Retire extends JApplet { public void init() { EventQueue.invokeLater(new Runnable() { public void run() { initUI(); } }); } public void initUI() { setLayout(new GridBagLayout()); add(languageLabel, new GBC(0, 0).setAnchor(GBC.EAST)); add(savingsLabel, new GBC(0, 1).setAnchor(GBC.EAST)); add(contribLabel, new GBC(2, 1).setAnchor(GBC.EAST)); add(incomeLabel, new GBC(4, 1).setAnchor(GBC.EAST)); add(currentAgeLabel, new GBC(0, 2).setAnchor(GBC.EAST)); add(retireAgeLabel, new GBC(2, 2).setAnchor(GBC.EAST)); add(deathAgeLabel, new GBC(4, 2).setAnchor(GBC.EAST)); add(inflationPercentLabel, new GBC(0, 3).setAnchor(GBC.EAST)); add(investPercentLabel, new GBC(2, 3).setAnchor(GBC.EAST)); add(localeCombo, new GBC(1, 0, 3, 1)); add(savingsField, new GBC(1, 1).setWeight(100, 0).setFill(GBC.HORIZONTAL)); add(contribField, new GBC(3, 1).setWeight(100, 0).setFill(GBC.HORIZONTAL)); add(incomeField, new GBC(5, 1).setWeight(100, 0).setFill(GBC.HORIZONTAL)); add(currentAgeField, new GBC(1, 2).setWeight(100, 0).setFill(GBC.HORIZONTAL)); add(retireAgeField, new GBC(3, 2).setWeight(100, 0).setFill(GBC.HORIZONTAL)); add(deathAgeField, new GBC(5, 2).setWeight(100, 0).setFill(GBC.HORIZONTAL)); add(inflationPercentField, new GBC(1, 3).setWeight(100, 0).setFill(GBC.HORIZONTAL)); add(investPercentField, new GBC(3, 3).setWeight(100, 0).setFill(GBC.HORIZONTAL)); add(retireCanvas, new GBC(0, 4, 4, 1).setWeight(100, 100).setFill(GBC.BOTH)); add(new JScrollPane(retireText), new GBC(4, 4, 2, 1).setWeight(0, 100).setFill(GBC.BOTH)); computeButton.setName("computeButton"); computeButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent event) { getInfo(); updateData(); updateGraph(); } }); add(computeButton, new GBC(5, 3)); retireText.setEditable(false); retireText.setFont(new Font("Monospaced", Font.PLAIN, 10)); info.setSavings(0); info.setContrib(9000); info.setIncome(60000); info.setCurrentAge(35); info.setRetireAge(65); info.setDeathAge(85); info.setInvestPercent(0.1); info.setInflationPercent(0.05); int localeIndex = 0; // US locale is default selection for (int i = 0; i < locales.length; i++) // if current locale one of the choices, select it if (getLocale().equals(locales[i])) localeIndex = i; setCurrentLocale(locales[localeIndex]); localeCombo.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent event) { setCurrentLocale((Locale) localeCombo.getSelectedItem()); validate(); } }); } /** * Sets the current locale. * @param locale the desired locale */ public void setCurrentLocale(Locale locale) { currentLocale = locale; localeCombo.setSelectedItem(currentLocale); localeCombo.setLocale(currentLocale); res = ResourceBundle.getBundle("RetireResources", currentLocale); resStrings = ResourceBundle.getBundle("RetireStrings", currentLocale); currencyFmt = NumberFormat.getCurrencyInstance(currentLocale); numberFmt = NumberFormat.getNumberInstance(currentLocale); percentFmt = NumberFormat.getPercentInstance(currentLocale); updateDisplay(); updateInfo(); updateData(); updateGraph(); } /** * Updates all labels in the display. */ public void updateDisplay() { languageLabel.setText(resStrings.getString("language")); savingsLabel.setText(resStrings.getString("savings")); contribLabel.setText(resStrings.getString("contrib")); incomeLabel.setText(resStrings.getString("income")); currentAgeLabel.setText(resStrings.getString("currentAge")); retireAgeLabel.setText(resStrings.getString("retireAge")); deathAgeLabel.setText(resStrings.getString("deathAge")); inflationPercentLabel.setText(resStrings.getString("inflationPercent")); investPercentLabel.setText(resStrings.getString("investPercent")); computeButton.setText(resStrings.getString("computeButton")); } /** * Updates the information in the text fields. */ public void updateInfo() { savingsField.setText(currencyFmt.format(info.getSavings())); contribField.setText(currencyFmt.format(info.getContrib())); incomeField.setText(currencyFmt.format(info.getIncome())); currentAgeField.setText(numberFmt.format(info.getCurrentAge())); retireAgeField.setText(numberFmt.format(info.getRetireAge())); deathAgeField.setText(numberFmt.format(info.getDeathAge())); investPercentField.setText(percentFmt.format(info.getInvestPercent())); inflationPercentField.setText(percentFmt.format(info.getInflationPercent())); } /** * Updates the data displayed in the text area. */ public void updateData() { retireText.setText(""); MessageFormat retireMsg = new MessageFormat(""); retireMsg.setLocale(currentLocale); retireMsg.applyPattern(resStrings.getString("retire")); for (int i = info.getCurrentAge(); i <= info.getDeathAge(); i++) { Object[] args = { i, info.getBalance(i) }; retireText.append(retireMsg.format(args) + "\n"); } } /** * Updates the graph. */ public void updateGraph() { retireCanvas.setColorPre((Color) res.getObject("colorPre")); retireCanvas.setColorGain((Color) res.getObject("colorGain")); retireCanvas.setColorLoss((Color) res.getObject("colorLoss")); retireCanvas.setInfo(info); repaint(); } /** * Reads the user input from the text fields. */ public void getInfo() { try { info.setSavings(currencyFmt.parse(savingsField.getText()).doubleValue()); info.setContrib(currencyFmt.parse(contribField.getText()).doubleValue()); info.setIncome(currencyFmt.parse(incomeField.getText()).doubleValue()); info.setCurrentAge(numberFmt.parse(currentAgeField.getText()).intValue()); info.setRetireAge(numberFmt.parse(retireAgeField.getText()).intValue()); info.setDeathAge(numberFmt.parse(deathAgeField.getText()).intValue()); info.setInvestPercent(percentFmt.parse(investPercentField.getText()).doubleValue()); info.setInflationPercent(percentFmt.parse(inflationPercentField.getText()).doubleValue()); } catch (ParseException e) { } } private JTextField savingsField = new JTextField(10); private JTextField contribField = new JTextField(10); private JTextField incomeField = new JTextField(10); private JTextField currentAgeField = new JTextField(4); private JTextField retireAgeField = new JTextField(4); private JTextField deathAgeField = new JTextField(4); private JTextField inflationPercentField = new JTextField(6); private JTextField investPercentField = new JTextField(6); private JTextArea retireText = new JTextArea(10, 25); private RetireCanvas retireCanvas = new RetireCanvas(); private JButton computeButton = new JButton(); private JLabel languageLabel = new JLabel(); private