testcalendar.java

常用的java控件使用实例源代码

import java.util.Calendar;
import java.text.SimpleDateFormat;
import java.util.Date;

public class TestCalendar {
	public static void main(String[] agrs ) {
		Calendar cal = Calendar.getInstance(); 
		//下面的就是把当前日期加90天 
		cal.add(Calendar.DAY_OF_YEAR, 30); 
		SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd"); 
		System.out.println("today is:" + format.format(Calendar.getInstance().getTime())); 
		System.out.println("yesterday is:" + format.format(cal.getTime()));
	}
	
}