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Age of child

Posted by Admin on
A child was born on 31/12/1999. The current date has been provided as input in "dd/mm/yyyy" format. What is the age of the child in days. Note that the current date will be later than 31/12/1999
ageInDays("01/01/2000")=1 
ageInDays("30/03/2013") = 4838
public class AgeOfChild {

       static String testcase1 = "1/1/2012";
      
       public static void main(String args[]){
              AgeOfChild testInstance= new AgeOfChild();
              int result = testInstance.ageInDays(testcase1);
              System.out.println("Result : "+result);
       }
      
       //write your code here
       public int ageInDays(String date){
              String DateOfBirth="31/12/1999";
              int birthMonthDays=findingDaysInYear(DateOfBirth);
              int birthYear=findYear(DateOfBirth);
              System.out.println(birthMonthDays);
              if((birthYear%4==0 && birthYear%100!=0 ) || (birthYear%100==0 && birthYear%400==0)){
                     birthMonthDays=366-birthMonthDays;
              }
              else{
                     birthMonthDays=365-birthMonthDays;
              }
             
              int endMonthDays=findingDaysInYear(date);
              int endYear=findYear(date);
              int daysInBetweenYear=findingDaysInBetweenYear(birthYear,endYear);
             
              return ((birthMonthDays+daysInBetweenYear+endMonthDays));
             
       }

       //finding days between the starting year and ending year
       private int findingDaysInBetweenYear(int birthYear, int endYear) {
              int days=0;
              for(int i=birthYear+1;i<endYear;i++){
                     if((i%4==0 && i%100!=0 ) || (i%100==0 && i%400==0)){
                           days=days+366;
                     }
                     else{
                           days=days+365;
                     }
              }
             
              return days;
       }

      
       // finding year of the date
       private int findYear(String str) {
              int len=str.length();
              int year=0;
              for(int i=len-4;i<len;i++){
                     char ch=str.charAt(i);
                     year=year*10+ch-'0';
              }
              return year;
       }

       //finding days in a particular year as per given date
       private int findingDaysInYear(String str){
              int len=str.length();
              int days=0;
              int month=0;
              int year=0;
              String strNew="";
              int num=0;
              int count=0;
              //splitting string to find month,days and year
              for(int i=0;i<len;i++){
                     char ch=str.charAt(i);
                     if(ch=='/' && count==0){
                         days=num;
                           num=0;
                           count++;
                     }
                     if(ch=='/' && count==1){
                           month=num;
                           num=0;
                     }
                     else if(i==len-1){
                           num=num*10+ch-'0';
                           year=num;
                     }
                     else{
                           num=num*10+ch-'0';
                     }
                                 
              }
             
              int daysInyear=findingDays(days,month,year);
              return daysInyear;
       }

       //helping method for the method(findigDaysInYear) to find days in a year
       private int findingDays(int days, int month, int year) {
              int totaldays=0;
             
              for(int i=1;i<month;i++)
              {
                     if(i==1 ||i==3|| i==5 || i==7 || i==8 ||i==10 || i==12 ){
                           totaldays=totaldays+31;
                          
                     }
                     else if(i==2 && ((year%4==0 && year%100!=0 ) || (year%100==0 && year%400==0))){
                           totaldays=totaldays+29;
                          
                     }
                     else if(i==2){
                           totaldays=totaldays+28;
                          
                     }
                     else{
                           totaldays=totaldays+30;
                          
                     }
              }
             
              totaldays=totaldays+days;
              return totaldays;
       }
}

 Please comment if you find any mistake.

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