Program to implement Apriori Algorithm

import java.io.*;
class apriori
{ 
public static void main(String []arg)throws IOException
{
int i,j,m=0;
int t1=0;
BufferedReader b=new BufferedReader(new InputStreamReader(System.in));
System.out.println("Enter the number of transaction :");
int n=Integer.parseInt(b.readLine());
System.out.println("items :1--Milk 2--Bread 3--Coffee 4--Juice  5--Cookies  6--Jam");
int item[][]=new int[n][6];
for(i=0;i<n;i++)
 for(j=0;j<6;j++)
   item[i][j]=0;
String[] itemlist={"MILK","BREAD","COFFEE","JUICE","COOKIES","JAM"};
int nt[]=new int[6];
int q[]=new int[6];
for(i=0;i<n;i++)
{ System.out.println("Transaction "+(i+1)+" :");
  for(j=0;j<6;j++)
  {  //System.out.println(itemlist[j]);
     System.out.println("Is Item "+itemlist[j]+" present in this transaction(1/0)? :");
     item[i][j]=Integer.parseInt(b.readLine()); 
  }
}
 for(j=0;j<6;j++) 
  { for(i=0;i<n;i++)
    {if(item[i][j]==1)
      nt[j]=nt[j]+1;
    }
    System.out.println("Number of Item "+itemlist[j]+" :"+nt[j]);
  }

for(j=0;j<6;j++)
{ if(((nt[j]/(float)n)*100)>=50)
    q[j]=1;
  else
    q[j]=0;

  if(q[j]==1)
   {t1++;
    System.out.println("Item "+itemlist[j]+" is selected "); 
   
   }
}
 for(j=0;j<6;j++) 
  { for(i=0;i<n;i++)
   {
     
     if(q[j]==0)
       { 
        item[i][j]=0;
       }
   }
   }

int nt1[][]=new int[6][6];
 for(j=0;j<6;j++) 
    {  for(m=j+1;m<6;m++) 
       { for(i=0;i<n;i++)
         { if(item[i][j]==1 &&item[i][m]==1)
           { nt1[j][m]=nt1[j][m]+1;
           }
         }
    if(nt1[j][m]!=0)
         System.out.println("Number of Items of  "+itemlist[j]+"& "+itemlist[m]+" :"+nt1[j][m]);
    }
  
   }
for(j=0;j<6;j++)
{ for(m=j+1;m<6;m++) 
  {
  if(((nt1[j][m]/(float)n)*100)>=50)
    q[j]=1;
  else
    q[j]=0;

  if(q[j]==1)
   {
    System.out.println("Item "+itemlist[j]+"& "+itemlist[m]+" is selected "); 
   
   }
}
}
} 
}

/*OUTPUT

Z:\>javac apriori.java

Z:\>java apriori
Enter the number of transaction :
4
items :1--Milk 2--Bread 3--Coffee 4--Juice  5--Cookies  6--Jam
Transaction 1 :
Is Item MILK present in this transaction(1/0)? :
1
Is Item BREAD present in this transaction(1/0)? :
1
Is Item COFFEE present in this transaction(1/0)? :
0
Is Item JUICE present in this transaction(1/0)? :
1
Is Item COOKIES present in this transaction(1/0)? :
1
Is Item JAM present in this transaction(1/0)? :
0
Transaction 2 :
Is Item MILK present in this transaction(1/0)? :
1
Is Item BREAD present in this transaction(1/0)? :
0
Is Item COFFEE present in this transaction(1/0)? :
0
Is Item JUICE present in this transaction(1/0)? :
1
Is Item COOKIES present in this transaction(1/0)? :
0
Is Item JAM present in this transaction(1/0)? :
0
Transaction 3 :
Is Item MILK present in this transaction(1/0)? :
1
Is Item BREAD present in this transaction(1/0)? :
0
Is Item COFFEE present in this transaction(1/0)? :
0
Is Item JUICE present in this transaction(1/0)? :
0
Is Item COOKIES present in this transaction(1/0)? :
0
Is Item JAM present in this transaction(1/0)? :
1
Transaction 4 :
Is Item MILK present in this transaction(1/0)? :
0
Is Item BREAD present in this transaction(1/0)? :
1
Is Item COFFEE present in this transaction(1/0)? :
1
Is Item JUICE present in this transaction(1/0)? :
0
Is Item COOKIES present in this transaction(1/0)? :
1
Is Item JAM present in this transaction(1/0)? :
0
Number of Item MILK :3
Number of Item BREAD :2
Number of Item COFFEE :1
Number of Item JUICE :2
Number of Item COOKIES :2
Number of Item JAM :1
Item MILK is selected
Item BREAD is selected
Item JUICE is selected
Item COOKIES is selected
Number of Items of  MILK& BREAD :1
Number of Items of  MILK& COFFEE :0
Number of Items of  MILK& JUICE :2
Number of Items of  MILK& COOKIES :1
Number of Items of  MILK& JAM :0
Number of Items of  BREAD& COFFEE :0
Number of Items of  BREAD& JUICE :1
Number of Items of  BREAD& COOKIES :2
Number of Items of  BREAD& JAM :0
Number of Items of  COFFEE& JUICE :0
Number of Items of  COFFEE& COOKIES :0
Number of Items of  COFFEE& JAM :0
Number of Items of  JUICE& COOKIES :1
Number of Items of  JUICE& JAM :0
Number of Items of  COOKIES& JAM :0
Item MILK& JUICE is selected
Item BREAD& COOKIES is selected

*/

//Create two file Config.txt & transa.txt put data as follows

Config.txt
81000040

transa.txt
1 2 3 4 5
6 7 8 9 10