datetimeoperation.java

具有代表性的示例,是初学java编程者不错的选择.

/*
 * Created on 2005-5-8
 *
 * TODO To change the template for this generated file go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
package org.chapter2;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.text.ParseException;
import java.util.Date;
import java.util.Calendar;
import java.util.Locale;
import java.util.GregorianCalendar;

/**
 * @author Administrator
 *
 * TODO To change the template for this generated type comment go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
public class DateTimeOperation {

	public static void main(String[] args) {
		
		DateFormat df = DateFormat.getDateInstance();
		try{
			Date date = df.parse("2005-05-01 20:10:10");
		}catch(ParseException e){
			System.out.println(e);
		}
		Date date = new Date();
		df = DateFormat.getDateTimeInstance(DateFormat.DEFAULT,DateFormat.DEFAULT);
		System.out.println("DateFormat.DEFAULT:" + df.format(date));
		
		df = DateFormat.getDateTimeInstance(DateFormat.SHORT,DateFormat.SHORT);
		System.out.println("DateFormat.SHORT  :" + df.format(date));
		
		df = DateFormat.getDateTimeInstance(DateFormat.MEDIUM,DateFormat.MEDIUM);
		System.out.println("DateFormat.MEDIUM :" + df.format(date));
		
		df = DateFormat.getDateTimeInstance(DateFormat.LONG,DateFormat.LONG);
		System.out.println("DateFormat.LONG   :" + df.format(date));
		
		df = DateFormat.getDateTimeInstance(DateFormat.FULL,DateFormat.FULL);
		System.out.println("DateFormat.FULL   :" + df.format(date));
		
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy/mm/dd");		
		System.out.println("SimpleDateFormat   :" + sdf.format(date));
		try{
			Date fromString = sdf.parse("2005/05/01 20:10:10");
		}catch(ParseException e){
			System.out.println(e);
		}
		
		/*
		Calendar cl = Calendar.getInstance();
		System.out.println(cl.getTime());
		System.out.println(cl.get(Calendar.DATE));
		System.out.println(cl.get(Calendar.DAY_OF_MONTH));
		System.out.println(cl.get(Calendar.DAY_OF_WEEK));
		System.out.println(cl.get(Calendar.DAY_OF_WEEK_IN_MONTH));
		System.out.println(cl.get(Calendar.DAY_OF_YEAR));
		System.out.println(cl.get(Calendar.HOUR_OF_DAY));
		System.out.println(cl.get(Calendar.MINUTE));
		*/
	}
	/* (non-Javadoc)
	 * @see java.lang.Object#equals(java.lang.Object)
	 */
	public boolean equals(Object arg0) {
		// TODO Auto-generated method stub
		
		return super.equals(arg0);
	}
}