Mega Code Archive

 

Categories / Java Tutorial / Internationalization

 

Japanese Calendar

import java.awt.BorderLayout; import java.awt.Color; import java.awt.Dimension; import java.awt.FontMetrics; import java.awt.Graphics; import java.awt.Insets; import java.awt.event.ItemEvent; import java.awt.event.ItemListener; import java.text.DateFormat; import java.text.DateFormatSymbols; import java.util.Calendar; import java.util.Date; import java.util.Locale; import javax.swing.BorderFactory; import javax.swing.JComboBox; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; public class JapaneseCalendar extends JPanel {   public JapaneseCalendar() {     setLayout(new BorderLayout());     final CalendarPane cp = new CalendarPane(Locale.JAPANESE);     add(cp, BorderLayout.NORTH);   }   public static void main(String[] a) {     JFrame f = new JFrame();     f.add(new JapaneseCalendar());     f.pack();     f.setVisible(true);   } } class CalendarPane extends JPanel {   final static Locale JAPAN_IMP_ERA = new Locale("ja", "JP", "JP");   private Locale locale;   CalendarPane(Locale initLocale) {     setPreferredSize(new Dimension(400, 400));     locale = initLocale;   }   public void paintComponent(Graphics g) {     int width = 400;     int height = 400;     Calendar cal = Calendar.getInstance(locale);     cal.setTime(new Date());     String header = cal.getDisplayName(Calendar.MONTH, Calendar.LONG, locale);     header += " " + cal.get(Calendar.YEAR);     FontMetrics fm = g.getFontMetrics();     Insets insets = getInsets();     g.setColor(Color.black);     g.drawString(header, (width - fm.stringWidth(header)) / 2, insets.top + fm.getHeight());     DateFormatSymbols dfs = new DateFormatSymbols(locale);     String[] weekdayNames = dfs.getShortWeekdays();     int fieldWidth = (width - insets.left - insets.right) / 7;     g.drawString(weekdayNames[Calendar.SUNDAY], insets.left         + (fieldWidth - fm.stringWidth(weekdayNames[Calendar.SUNDAY])) / 2, insets.top + 3         * fm.getHeight());     g.drawString(weekdayNames[Calendar.MONDAY], insets.left + fieldWidth         + (fieldWidth - fm.stringWidth(weekdayNames[Calendar.MONDAY])) / 2, insets.top + 3         * fm.getHeight());     g.drawString(weekdayNames[Calendar.TUESDAY], insets.left + 2 * fieldWidth         + (fieldWidth - fm.stringWidth(weekdayNames[Calendar.TUESDAY])) / 2, insets.top + 3         * fm.getHeight());     g.drawString(weekdayNames[Calendar.WEDNESDAY], insets.left + 3 * fieldWidth         + (fieldWidth - fm.stringWidth(weekdayNames[Calendar.WEDNESDAY])) / 2, insets.top + 3         * fm.getHeight());     g.drawString(weekdayNames[Calendar.THURSDAY], insets.left + 4 * fieldWidth         + (fieldWidth - fm.stringWidth(weekdayNames[Calendar.THURSDAY])) / 2, insets.top + 3         * fm.getHeight());     g.drawString(weekdayNames[Calendar.FRIDAY], insets.left + 5 * fieldWidth         + (fieldWidth - fm.stringWidth(weekdayNames[Calendar.FRIDAY])) / 2, insets.top + 3         * fm.getHeight());     g.drawString(weekdayNames[Calendar.SATURDAY], insets.left + 6 * fieldWidth         + (fieldWidth - fm.stringWidth(weekdayNames[Calendar.SATURDAY])) / 2, insets.top + 3         * fm.getHeight());     int dom = cal.get(Calendar.DAY_OF_MONTH);     cal.set(Calendar.DAY_OF_MONTH, 1);     int col = 0;     switch (cal.get(Calendar.DAY_OF_WEEK)) {     case Calendar.MONDAY:       col = 1;       break;     case Calendar.TUESDAY:       col = 2;       break;     case Calendar.WEDNESDAY:       col = 3;       break;     case Calendar.THURSDAY:       col = 4;       break;     case Calendar.FRIDAY:       col = 5;       break;     case Calendar.SATURDAY:       col = 6;     }     cal.set(Calendar.DAY_OF_MONTH, dom);     int row = 5 * fm.getHeight();     for (int i = 1; i <= cal.getActualMaximum(Calendar.DAY_OF_MONTH); i++) {       g.drawString("" + i, insets.left + fieldWidth * col + (fieldWidth - fm.stringWidth("" + i))           / 2, row);       if (++col > 6) {         col = 0;         row += fm.getHeight();       }     }   } }