Day For The Given Date

/*Write a program to accept a date in a specific string format (dd/mm/yyyy) and accept the name of the day on 1st January of the corresponding year. Find the day for the given date.

Example:
Input:
Enter the date ( in dd/mm/yyyy) format: 5/7/2001
Enter the Day on 1st January in this year: Monday

Output:
5/7/2001 : Thursday*/
import java.io.*;
class Date
{
int arr[]={31,28,31,30,31,30,31,31,30,31,30,31};
BufferedReader br;
String str1,day,day1;
int x,i,dayno,mon,yr,leap1;
public static void main(String args[])throws IOException
{
Date ob=new Date ();
ob.take();
ob.show();
}
Date ()
{
br=new BufferedReader(new InputStreamReader(System.in));
}
public void take()throws IOException
{
System.out.println("Enter the date ( in dd/mm/yyyy) format:");
day=br.readLine().trim();
day1=day;
i=day.indexOf("/");
dayno=Integer.parseInt(day.substring(0,i));
day=day.substring(i+1);
i=day.indexOf("/");
mon=Integer.parseInt(day.substring(0,i));
day=day.substring(i+1);
yr=Integer.parseInt(day);
leap1=0;
if(mon>2)
leap1=leap(yr);
System.out.println("Enter the Day on 1st January in this year:");
str1=br.readLine().trim();
}
int leap(int p)
{
if(p%100==0 && p%400==0)
return 1;
else if(p%100!=0 && p%4==0)
return 1;
else
return 0;
}
void show ()
{
if (str1.equalsIgnoreCase("Sunday"))
x=1;
else if (str1.equalsIgnoreCase("Monday"))
x=2;
else if (str1.equalsIgnoreCase("Tuesday"))
x=3;
else if (str1.equalsIgnoreCase("Wednesday"))
x=4;
else if (str1.equalsIgnoreCase("Thursday"))
x=5;
else if (str1.equalsIgnoreCase("Friday"))
x=6;
else if (str1.equalsIgnoreCase("Saturday"))
x=7;

for(i=0;i< mon-1;i++)
dayno=dayno+arr[i];
dayno=dayno+leap1;
for(i=0;i< dayno-1;i++)
{
 x++;
 if(x==8)
 x=1;
 }
 System.out.println(day1+ ":");
switch(x)
{
 case 1:
 System.out.println("Sunday");
 break;
 case 2:
 System.out.println("Monday");
 break;
 case 3:
 System.out.println("Tuesday");
 break;
 case 4:
 System.out.println("Wednesday");
 break;
 case 5:
 System.out.println("Thursday");
 break;
 case 6:
 System.out.println("Friday");
 break;
 case 7:
 System.out.println("Saturday");
 break;
}
 }
 }