java Combobox，循环添加Item

直接看例子：：：

final static JComboBox cb_birthDatey = new JComboBox();
final static JComboBox cb_birthDatem = new JComboBox();
final static JComboBox cb_birthDated = new JComboBox();

for(int i=1960;i<=2014;i++)

{
String s=Integer.toString(i);
cb_birthDatey.addItem(s);
}
for(int i=1;i<=12;i++)
{
String s=Integer.toString(i);
cb_birthDatem.addItem(s);
}
for(int i=1;i<=31;i++)
{
String s=Integer.toString(i);
cb_birthDated.addItem(s);
}