Unique Number

import java.io.*;
 class Unique
{
public static void main(String args[])throws IOException
 {
 BufferedReader in=new BufferedReader(new InputStreamReader(System.in));
 int check=0,count=0,m,n,j,d,no_of_digits=0,num;
System.out.println("\nINPUT:\n");
 System.out.print("m=");
 m=Integer.parseInt(in.readLine());
 System.out.print("n=");
 n=Integer.parseInt(in.readLine());
 System.out.print("UNIQUE DIGIT INTEGERS ARE:");//find unique numbers between m and n 
for(j=m;j<=n;j++)
 {
check=0;
for(d=0;d<=9;d++) //this loop helps in checking digits from 0 to 9
{ num=j; no_of_digits=0;
 while(num>0)//finding digits from number stored
 {
int digit=num%10;
 if(digit==d)//check the equality of extracted digit and value of d
 {
 no_of_digits++;
 }//end if
 num=num/10;
 }//end while loop
 if(no_of_digits>1)
{
 check=1;
 break;//from here control goes out of for d loop
}//end if
}//end of d loop
if(check==0)//here check=0 means digits of the number is not repeating so it is unique
 {
System.out.print(j+" ");
 count++;
}//end if
 }//end for j loop
System.out.println("\n\nFREQUENCY OF UNIQUE DIGIT INTEGERS ARE:"+count);
}
}