import java.util.Calendar;
import java.util.GregorianCalendar;

/**
 * CalTest.java
 *
 * Version 0.1
 *
 * Created 2006-6-9  16:29:22
 *
 *  TODO
 */

public class CalTest
{

 /**
  * 得到本月的最后一天；
  * @return
  */
 public static int getLastDayOfMonth(){
  int intDay  = 0;
  GregorianCalendar cca = new GregorianCalendar();
  Calendar ca = cca.getInstance();
  intDay = cca.getActualMaximum(ca.DAY_OF_MONTH);
  return intDay;
 }
}

/**
-----------------------下面是测试类-------------------------
**/
import junit.framework.TestCase;

public class CalTestTest extends TestCase
{

 protected void setUp() throws Exception
 {
  super.setUp();
 }

 protected void tearDown() throws Exception
 {
  super.tearDown();
 }

 /*
  * Test method for 'CalTest.getLastDayOfMonth()'
  */
 public void testGetLastDayOfMonth()
 {
  int intDay = CalTest.getLastDayOfMonth();
  System.out.println(intDay);
 }

}