JAVA编程：打印昨天的当前时刻

Question

请各位高手帮帮忙
怎么样用JAVA打印出昨天的当前时刻？

Answer 1

Calculator推算到昨天时间,然后画到界面上,界面实现printable

Answer 2

java.util.Date d=new java.util.Date();
java.util.Calendar c=java.util.Calendar.getInstance();
c.setTime(d);
c.add(java.util.Calendar.DAY_OF_MONTH,-1);
System.out.println(c.getTime());

Answer 3

public class MyDate{
    private int year;
    private int month;
    private int day;    public MyDate(int year, int month, int day){
 this.year = year;
 this.month = month;
 this.day = day;
    }    public MyDate nextDay(){
 int newDay = day + 1;
 int newMonth = month;
 int newYear = year;
 if(newDay > 30){
     newMonth ++;
     newDay = 1;
 } if(newMonth > 12){
     newYear ++;
     newMonth = 1;
 }
 MyDate newDate = 
  new MyDate(newYear, newMonth, newDay);
 return newDate;
    }    public int getYear(){
 return year;
    }    public int getMonth(){
 return month;
    }    public int getDay(){
 return day;
    }
}
package ch04;public class DateTest{
    public static void main(String[] args){
 MyDate oldDate = new MyDate(2005, 12, 30);
 MyDate newDate = oldDate.nextDay();
 System.out.println(newDate.getYear());
 System.out.println(newDate.getMonth());
 System.out.println(newDate.getDay());
    }
}

Answer 4

import java.util.Calendar;
public class test { 
         public static void main(String[] args) {  
           Calendar cal = Calendar.getInstance();
   int year=cal.get(Calendar.YEAR); 
          int month=cal.get(Calendar.MONTH)+1; 
           int date=cal.get(Calendar.DATE);
          int hour=cal.get(Calendar.HOUR);
          int sencond=cal.get(Calendar.SECOND);
          int minute=cal.get(Calendar.MINUTE);
          System.out.println("今天是"+" "+year+"年"+month+"月"+date+"日"+" "+hour+"小时"+sencond+"分"+minute+"秒"); 
   cal.add(Calendar.DATE, -1);
   System.out.println(cal.getTime());
  year=cal.get(Calendar.YEAR); 
          month=cal.get(Calendar.MONTH)+1; 
  date=cal.get(Calendar.DATE);
          hour=cal.get(Calendar.HOUR);
          sencond=cal.get(Calendar.SECOND);
          minute=cal.get(Calendar.MINUTE);
          System.out.println("昨天是"+" "+year+"年"+month+"月"+date+"日"+" "+hour+"小时"+sencond+"分"+minute+"秒");  }
}

Answer 5

public static void main(String[] args) {
Calendar cal=Calendar.getInstance();
cal.set(Calendar.DAY_OF_MONTH, cal.get(Calendar.DAY_OF_MONTH)-1);
System.out.println(cal.getTime());
}