import java.util.Calendar;

  public class YesterdayCurrent {
       public static void main(String[] args) {
             Calendar cal = Calendar.getInstance(); 
             cal.add(Calendar.DATE, -1); //根據(jù)日歷的規(guī)則，為給定的日歷字段添加或減去指定的時(shí)間量
             System.out.println(cal.getTime()); //返回表示此Calendar時(shí)間值的Date對(duì)象
         }

    }