JAVA_自動獲取一年內全部星期六的日期

public class PrintDate { /** * @param args */
 public static void main(String[] args) { // TODO Auto-generated method stub
  Calendar calendar=Calendar.getInstance();//當前日期
  int year=calendar.get(Calendar.YEAR);//2010
  int nextyear=calendar.get(Calendar.YEAR)+1;//2011;
  Calendar nowyear=Calendar.getInstance(); Calendar nexty=Calendar.getInstance(); nowyear.set(year, 0, 1);//2010-1-1
  nexty.set(nextyear, 0, 1);//2011-1-1
 calendar.add(Calendar.DAY_OF_MONTH, -calendar.get(Calendar.DAY_OF_WEEK));//週六
  Calendar c=(Calendar) calendar.clone(); for(;calendar.before(nexty)&&calendar.after(nowyear);calendar.add(Calendar.DAY_OF_YEAR, -7)){ printf(calendar); } for(;c.before(nexty)&&c.after(nowyear);c.add(Calendar.DAY_OF_YEAR, 7)){ printf(c); } } //打印
     public static void printf(Calendar calendar) { System.out.println(calendar.get(Calendar.YEAR)+"-"+(1+calendar.get(Calendar.MONTH))+"-"+calendar.get(Calendar.DATE)); } }