Design a Date class similar to the one provided in the java.util package in java

HI,




















Here is a program to find, entered date is which day ( Mon, Tues, Wed, Thurs, Fri, Sat or Sun)

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package date;

public class day

{

int day,month,year,y,m,tot_day=0;

int day_mon[]={31,28,31,30,31,30,31,31,30,31,30,31};

String week[]={"sunday","monday","tuesday","wednesday","thursday","friday","saturday"};

public void days(int a,int b,int c)

{

valid(a,b,c);

day=a;

month=b;year=c;

for(y=0;y<year;y++)

if(y%4==0)

tot_day+=366;

else

tot_day+=365;

if(month>2 && year%4==0)

day_mon[1]=29;

for(m=0;m<(month-1);m++)

tot_day+=day_mon[m];

tot_day+=day;

System.out.println(day+"-"+month+"-"+year+" this is :"+"="+week[(tot_day+4)%7]);

}

public void valid(int dd,int mm,int yy)

{

if(yy<1)

{

System.out.println("invalid....");

System.exit(0);

}

switch(mm)

{

case 1:

case 3:

case 5:

case 7:

case 8:

case 10:

case 12:

if(dd>31 || dd<1)

{

System.out.println("invalid......");

System.exit(0);

}

break;

case 4:

case 6:

case 9:

case 11:

if(dd>30 || dd<1)

{

System.out.println("invalid......");

System.exit(0);

}

break;

case 2:

if(yy%4!=0 && dd>=29 && dd<1)

{

System.out.println("invalid......");

System.exit(0);

}

else if(yy%4==0 || dd>28 || dd<1)

{

System.out.println("invalid......");

System.exit(0);

}break;

default:

System.out.println("invalid......");

System.exit(0);

}

}

}

Main program:

import date.*;

import java.io.*;

class chkd

{

public static void main(String args[])throws IOException

{

DataInputStream in=new DataInputStream(System.in);

day d=new day();

System.out.println("enter the date:(dd mm yyyy):");

int dd=Integer.parseInt(in.readLine());

int mm=Integer.parseInt(in.readLine());

int yy=Integer.parseInt(in.readLine());

d.days(dd,mm,yy);

}

}

Output:

C:\j2sdk1.4.0\bin>javac chkd.java

Note: chkd.java uses or overrides a deprecated API.

Note: Recompile with -deprecation for details.

C:\j2sdk1.4.0\bin>java chkd

enter the date:(dd mm yyyy):

30

04

1989

30-4-1989 this is :=sunday

C:\j2sdk1.4.0\bin>java chkd

enter the date:(dd mm yyyy):

30

02

2000

invalid......