More Swing components - An Introduction to Graphical User Interfaces with Java Swing - page 195

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import java.awt.event.ActionListener;

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import javax.swing.JComboBox;

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import javax.swing.JLabel;

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import javax.swing.JPanel;

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public class CalendarPanel extends JPanel {

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private String[] months = {"January","February","March","April",

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"May","June","July","August",

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"September","October","November","December"};

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private JComboBox yearBox = new JComboBox();

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private JComboBox monthBox = new JComboBox(months);

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private JComboBox dayBox = new JComboBox();

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private JLabel yearLabel = new JLabel("Year ");

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private JLabel monthLabel = new JLabel("Month ");

private JLabel dayLabel = new JLabel("Day "); 19.

private JLabel dummy = new JLabel(""); 20.

private int startyear; 21.

private int endyear; 22.

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public CalendarPanel() {

this .setLayout( new GridLayout(4,2)); 25.

startyear = 2004; 26.

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endyear = 2007;

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initBoxes();

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this .add(dayLabel);

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this .add(dayBox);

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this .add(monthLabel);

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this .add(monthBox);

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this .add(yearLabel);

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this .add(yearBox);

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this .add(dummy);

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37. yearBox.setEditable( true );

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CalenderListener cList = new CalenderListener();

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yearBox.setActionCommand("YearChanged");

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yearBox.addActionListener(cList);

monthBox.setActionCommand("MonthChanged"); 41.

monthBox.addActionListener(cList); 42.

} 43.

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private void initBoxes()

{ 46.

for ( int y=startyear;y <= endyear;y++ ) 47.

{ 48.

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yearBox.addItem(Integer.toString(y));

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}// for

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for ( int d=1;d<=31 ;d++ )