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POJcalender in Swing Java
 

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    <p>// I am creating customize jcalender in swing </p> <p>//I am facing problem regarding dates set //i.e actual month is start from tuesday and it is starting from wednesday // I am finding problem regarding setting values in calender-model</p> <p>//Above code is running fine but problem in showing actual dates //please suggest me to make necessary changes</p> <pre><code>import java.awt.Color; public class Calendar extends JFrame { private JPanel contentPane; String[] years = { "2008", "2009", "2010" ,"2011","2012","2013","2014"}; JComboBox comboBox = new JComboBox(years); String[] months = { "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" }; JList list = new JList(months); JScrollPane scrollPane = new JScrollPane(list); CalendarModel model = new CalendarModel(); JTable table = new JTable(model); public Calendar() { super(); getContentPane().setLayout(null); comboBox.setBounds(10, 10, 100, 30); comboBox.setSelectedIndex(5); comboBox.addItemListener(new ComboHandler()); scrollPane.setBounds(200, 10, 150, 100); list.setSelectedIndex(10); list.addListSelectionListener(new ListHandler()); table.setBounds(10, 150, 550, 200); model.setMonth(comboBox.getSelectedIndex() + 1998, list.getSelectedIndex()); getContentPane().add(comboBox); getContentPane().add(scrollPane); table.setGridColor(Color.black); table.setShowGrid(true); getContentPane().add(table); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setSize(530,300); setVisible(true); } /** * Launch the application. */ public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { public void run() { try { Calendar frame = new Calendar(); frame.setVisible(true); } catch (Exception e) { e.printStackTrace(); } } }); } public class ComboHandler implements ItemListener { public void itemStateChanged(ItemEvent e) { System.out.println("ItemState change Method called "); model.setMonth(comboBox.getSelectedIndex() + 1998, list.getSelectedIndex()); table.repaint(); } } public class ListHandler implements ListSelectionListener { public void valueChanged(ListSelectionEvent e) { model.setMonth(comboBox.getSelectedIndex() + 1998, list.getSelectedIndex()); table.repaint(); } } } class CalendarModel extends AbstractTableModel { String[] days = { "Sun" , "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" }; int[] numDays = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; String[][] calendar = new String[7][7]; public CalendarModel() { //setting name of days (mon,tues) for (int i = 0; i &lt; days.length; ++i) { System.out.println("day[i] *** "+days[i]); calendar[0][i] = days[i]; } for (int i = 1; i &lt; 7; ++i){ for (int j = 0; j &lt; 7; ++j) { System.out.println("calendar[i][j] value i ** "+i +" j value "+ j ); calendar[i][j] = " "; } } } public int getRowCount() { return 7; } public int getColumnCount() { return 7; } public Object getValueAt(int row, int column) { System.out.println("get Value at ** "+calendar[row][column]); return calendar[row][column]; } /* public void setValueAt(Object value, int row, int column) { System.out.println("set Value at ** "+(String) value); calendar[row][column] = (String) value; }*/ public void setMonth(int year, int month) { for (int i = 1; i &lt; 7; ++i) { for (int j = 0; j &lt; 7; ++j) { calendar[i][j] = " "; } } java.util.GregorianCalendar cal = new java.util.GregorianCalendar(); cal.set(year, month, 1); int offset = cal.get(java.util.GregorianCalendar.DAY_OF_WEEK) - 1; offset += 7; int num = daysInMonth(year, month); for (int i = 0; i &lt; num; ++i) { System.out.println("offset *** "+Integer.toString(i+1)); calendar[offset / 7][offset % 7] = Integer.toString(i+1); ++offset; } } public boolean isLeapYear(int year) { System.out.println("Is Leap Year *** "); if (year % 4 == 0) return true; return false; } public int daysInMonth(int year, int month) { System.out.println("day In month*** "); int days = numDays[month]; if (month == 1 &amp;&amp; isLeapYear(year)) ++days; System.out.println("days *** "+days); return days; } } </code></pre>
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