用java实现一个功能关于日期的

Question

我想统计宝宝现在多大了
例如：你的宝宝出生日期是2006-02-23 到现在已经2岁1个月零6天了·～
谁能提供一下算法？

Answer 1

现在日期:2008-2-20
出生日期:2006-3-23
请看上边2个日期数字,可以看出
  将他们的year month day互相减去计算应该可以
 其中细节注意的是:该年2月是否是闰年,月份是否超出出生月份，日期是否超出出生日期

Answer 2

                int startYear = 2006;
int startMonth = Calendar.FEBRUARY;
int startDay = 23;

Calendar start = Calendar.getInstance();
start.set(Calendar.YEAR, startYear);
start.set(Calendar.MONTH, startMonth);
start.set(Calendar.DAY_OF_MONTH, startDay);

Calendar now = Calendar.getInstance();

int nowYear = now.get(Calendar.YEAR);
int nowMonth = now.get(Calendar.MONTH);
int nowDay = now.get(Calendar.DAY_OF_MONTH);

int ageYear = nowYear - startYear;
int ageMonth = nowMonth - startMonth;
int ageDay = nowDay - startDay;

Calendar age = Calendar.getInstance();
age.set(Calendar.YEAR, ageYear);
age.set(Calendar.MONTH, ageMonth);
age.set(Calendar.DAY_OF_MONTH, ageDay);

StringBuilder builder = new StringBuilder();
builder.append((age.get(Calendar.YEAR)) + " sui ");
builder.append((age.get(Calendar.MONTH) + " yue "));
builder.append(age.get(Calendar.DATE) + " tian");

System.out.println(builder.toString());

Answer 3

public static void a() {
Calendar cd = Calendar.getInstance();
cd.set(cd.get(Calendar.YEAR) - 2006, cd.get(Calendar.MONTH) - 1, cd
.get(Calendar.DAY_OF_MONTH) - 23);
System.out.println(String.valueOf(cd.get(Calendar.YEAR)) + "岁"
+ String.valueOf(cd.get(Calendar.MONTH)) + "月"
+ String.valueOf(cd.get(Calendar.DAY_OF_MONTH)) + "天");
}

Answer 4

[code=Java]
import java.util.Date;
import java.text.SimpleDateFormat;public class Test16
{
    int bornYear = 0;
    int bornMonth = 0;
    int bornDay = 0;
    
    
    public Test16( int bornYear, int bornMonth, int bornDay )
    {
        this.bornYear = bornYear;
        this.bornMonth = bornMonth;
        this.bornDay = bornDay;
    }
    
    
    public void countAge()
    {
     //get current date
     Date currentDate = new Date();
    
     //format date form
        SimpleDateFormat m_oFormatOnlyYear = new SimpleDateFormat( "yyyy" );
        SimpleDateFormat m_oFormatOnlyMonth = new SimpleDateFormat( "MM" );
        SimpleDateFormat m_oFormatOnlyDay = new SimpleDateFormat( "dd" );
        
        //current year
        String strOnlyYear = m_oFormatOnlyYear.format( currentDate ); 
        int intOnlyYear = Integer.parseInt( strOnlyYear );
        
        //current month
        String strOnlyMonth = m_oFormatOnlyMonth.format( currentDate ); 
        int intOnlyMonth = Integer.parseInt( strOnlyMonth );
        
        //current day
        String strOnlyDay = m_oFormatOnlyDay.format( currentDate ); 
        int intOnlyDay = Integer.parseInt( strOnlyDay );
        
        //System.out.println("OnlyYear:"+intOnlyYear);
        //System.out.println("OnlyMonth:"+intOnlyMonth);
        //System.out.println("OnlyMonth:"+intOnlyDay);
        
        //TODO...
        //use intOnlyYear, intOnlyMonth, intOnlyDay that get from system
        //then process them with bornYear, bornMonth, bornDay that the 
        //property this class has
    }
    
    public static void main( String[] args )
    {
    
    }
}
code]

Answer 5

import java.util.Date;
import java.text.SimpleDateFormat;public class Test16
{
    int bornYear = 0;
    int bornMonth = 0;
    int bornDay = 0;
    
    
    public Test16( int bornYear, int bornMonth, int bornDay )
    {
        this.bornYear = bornYear;
        this.bornMonth = bornMonth;
        this.bornDay = bornDay;
    }
    
    
    public void countAge()
    {
     //get current date
     Date currentDate = new Date();
    
     //format date form
        SimpleDateFormat m_oFormatOnlyYear = new SimpleDateFormat( "yyyy" );
        SimpleDateFormat m_oFormatOnlyMonth = new SimpleDateFormat( "MM" );
        SimpleDateFormat m_oFormatOnlyDay = new SimpleDateFormat( "dd" );
        
        //current year
        String strOnlyYear = m_oFormatOnlyYear.format( currentDate ); 
        int intOnlyYear = Integer.parseInt( strOnlyYear );
        
        //current month
        String strOnlyMonth = m_oFormatOnlyMonth.format( currentDate ); 
        int intOnlyMonth = Integer.parseInt( strOnlyMonth );
        
        //current day
        String strOnlyDay = m_oFormatOnlyDay.format( currentDate ); 
        int intOnlyDay = Integer.parseInt( strOnlyDay );
        
        //System.out.println("OnlyYear:"+intOnlyYear);
        //System.out.println("OnlyMonth:"+intOnlyMonth);
        //System.out.println("OnlyMonth:"+intOnlyDay);
        
        //TODO...
        //use intOnlyYear, intOnlyMonth, intOnlyDay that get from system
        //then process them with bornYear, bornMonth, bornDay that the 
        //property this class has
    }
    
    public static void main( String[] args )
    {
    
    }
}