FP PBO :Calendar viewer

Berikut Ini adalah source codenya

//Import packages
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;

public class ViewCalendar {

     JLabel lblMonth, lblYear;
     JButton btnPrev, btnNext;
     JTable tblCalendar;
     JComboBox cmbYear;
     JFrame frmMain;
     Container pane;
     DefaultTableModel mtblCalendar; //Table model
     JScrollPane stblCalendar; //The scrollpane
     JPanel pnlCalendar;
     int realYear, realMonth, realDay, currentYear, currentMonth;

    public void viewCalendar() {
        System.out.println("*Calendar open*");
        //Look and feel
        try {
            UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
        } catch (ClassNotFoundException e) {
        } catch (InstantiationException e) {
        } catch (IllegalAccessException e) {
        } catch (UnsupportedLookAndFeelException e) {
        }

        //Prepare frame
        frmMain = new JFrame("Scheduled Repairs"); //Create frame
        frmMain.setSize(330, 375); //Set size to 400x400 pixels
        pane = frmMain.getContentPane(); //Get content pane
        pane.setLayout(null); //Apply null layout
        frmMain.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //Close when X is clicked

        //Create controls
        lblMonth = new JLabel("January");
        lblYear = new JLabel("Change year:");
        cmbYear = new JComboBox();
        btnPrev = new JButton("<<");
        btnNext = new JButton(">>");
        mtblCalendar = new DefaultTableModel() {

            public boolean isCellEditable(int rowIndex, int mColIndex) {
                return false;
            }
        };
        tblCalendar = new JTable(mtblCalendar);
        stblCalendar = new JScrollPane(tblCalendar);
        pnlCalendar = new JPanel(null);

        //Set border
        pnlCalendar.setBorder(BorderFactory.createTitledBorder("Calendar"));

        //Register action listeners
        btnPrev.addActionListener(new btnPrev_Action());
        btnNext.addActionListener(new btnNext_Action());
        cmbYear.addActionListener(new cmbYear_Action());

        //Add controls to pane
        pane.add(pnlCalendar);
        pnlCalendar.add(lblMonth);
        pnlCalendar.add(lblYear);
        pnlCalendar.add(cmbYear);
        pnlCalendar.add(btnPrev);
        pnlCalendar.add(btnNext);
        pnlCalendar.add(stblCalendar);

        //Set bounds
        pnlCalendar.setBounds(0, 0, 320, 335);
        lblMonth.setBounds(160 - lblMonth.getPreferredSize().width / 2, 25, 100, 25);
        lblYear.setBounds(10, 305, 80, 20);
        cmbYear.setBounds(230, 305, 80, 20);
        btnPrev.setBounds(10, 25, 50, 25);
        btnNext.setBounds(260, 25, 50, 25);
        stblCalendar.setBounds(10, 50, 300, 250);

        //Make frame visible
        frmMain.setResizable(true);
        frmMain.setVisible(true);

        //Get real month/year
        GregorianCalendar cal = new GregorianCalendar(); //Create calendar
        realDay = cal.get(GregorianCalendar.DAY_OF_MONTH); //Get day
        realMonth = cal.get(GregorianCalendar.MONTH); //Get month
        realYear = cal.get(GregorianCalendar.YEAR); //Get year
        currentMonth = realMonth; //Match month and year
        currentYear = realYear;

        //Add headers
        String[] headers = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"}; //All headers
        for (int i = 0; i < 7; i++) {
            mtblCalendar.addColumn(headers[i]);
        }

        tblCalendar.getParent().setBackground(tblCalendar.getBackground()); //Set background

        //No resize/reorder
        tblCalendar.getTableHeader().setResizingAllowed(false);
        tblCalendar.getTableHeader().setReorderingAllowed(false);

        //Single cell selection
        tblCalendar.setColumnSelectionAllowed(true);
        tblCalendar.setRowSelectionAllowed(true);
        tblCalendar.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);

        //Set row/column count
        tblCalendar.setRowHeight(38);
        mtblCalendar.setColumnCount(7);
        mtblCalendar.setRowCount(6);

        //Populate table
        for (int i = realYear - 100; i <= realYear + 100; i++) {
            cmbYear.addItem(String.valueOf(i));
        }

        //Refresh calendar
        refreshCalendar(realMonth, realYear); //Refresh calendar
    }

    public  void refreshCalendar(int month, int year) {
        //Variables
        String[] months = {"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"};
        int nod, som; //Number Of Days, Start Of Month

        //Allow/disallow buttons
        btnPrev.setEnabled(true);
        btnNext.setEnabled(true);
        if (month == 0 && year <= realYear - 10) {
            btnPrev.setEnabled(false);
        } //Too early
        if (month == 11 && year >= realYear + 100) {
            btnNext.setEnabled(false);
        } //Too late
        lblMonth.setText(months[month]); //Refresh the month label (at the top)
        lblMonth.setBounds(160 - lblMonth.getPreferredSize().width / 2, 25, 180, 25); //Re-align label with calendar
        cmbYear.setSelectedItem(String.valueOf(year)); //Select the correct year in the combo box

        //Clear table
        for (int i = 0; i < 6; i++) {
            for (int j = 0; j < 7; j++) {
                mtblCalendar.setValueAt(null, i, j);
            }
        }

        //Get first day of month and number of days
        GregorianCalendar cal = new GregorianCalendar(year, month, 1);
        nod = cal.getActualMaximum(GregorianCalendar.DAY_OF_MONTH);
        som = cal.get(GregorianCalendar.DAY_OF_WEEK);

        //Draw calendar
        for (int i = 1; i <= nod; i++) {
            int row = new Integer((i + som - 2) / 7);
            int column = (i + som - 2) % 7;
            mtblCalendar.setValueAt(i, row, column);
        }

        //Apply renderers
        tblCalendar.setDefaultRenderer(tblCalendar.getColumnClass(0), new tblCalendarRenderer());
    }

     class tblCalendarRenderer extends DefaultTableCellRenderer {

        public Component getTableCellRendererComponent(JTable table, Object value, boolean selected, boolean focused, int row, int column) {
            super.getTableCellRendererComponent(table, value, selected, focused, row, column);
            if (column == 0 || column == 6) { //Week-end
                setBackground(new Color(255, 220, 220));
            } else { //Week
                setBackground(new Color(255, 255, 255));
            }
            if (value != null) {
                if (Integer.parseInt(value.toString()) == realDay && currentMonth == realMonth && currentYear == realYear) { //Today
                    setBackground(new Color(220, 220, 255));
                }
            }
            setBorder(null);
            setForeground(Color.black);
            return this;
        }
    }

     class btnPrev_Action implements ActionListener {

        public void actionPerformed(ActionEvent e) {
            if (currentMonth == 0) { //Back one year
                currentMonth = 11;
                currentYear -= 1;
            } else { //Back one month
                currentMonth -= 1;
            }
            refreshCalendar(currentMonth, currentYear);
        }
    }

     class btnNext_Action implements ActionListener {

        public void actionPerformed(ActionEvent e) {
            if (currentMonth == 11) { //Foward one year
                currentMonth = 0;
                currentYear += 1;
            } else { //Foward one month
                currentMonth += 1;
            }
            refreshCalendar(currentMonth, currentYear);
        }
    }

     class cmbYear_Action implements ActionListener {

        public void actionPerformed(ActionEvent e) {
            if (cmbYear.getSelectedItem() != null) {
                String b = cmbYear.getSelectedItem().toString();
                currentYear = Integer.parseInt(b);
                refreshCalendar(currentMonth, currentYear);
            }
        }
    }
}
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