Java Program to implement binary checksum

//java program for binary checksum
import java.util.*;
import java.io.*;
class DjCheck1
{
int i,j,k,l,m,n;
String and="";
String compl="";
int ans;
public void checksum()
{
int[] msg1=new int[8];
int[] msg2=new int[8];
Scanner s=new Scanner(System.in);

System.out.println(" Enter your 1st binary value [8 bit]: ");
for(i=0;i<8;i++)// to get values
{
msg1[i]=s.nextInt();
}

System.out.println(" Enter your 2nd binary value [8 bit]: ");
for(j=0;j<8;j++)
{
msg2[j]=s.nextInt();
}

System.out.print("\nValue 1: ");
for(k=0;k<8;k++)// to print values
{
System.out.print(msg1[k]);
}

System.out.print("\nValue 2: ");
for(l=0;l<8;l++)
{
System.out.print(msg2[l]);
}

for(m=0;m<8;m++)// for 1s complement
{
and+=msg1[m] & msg2[m];
if(and.charAt(m)=='0')
compl+="1";
else
compl+="0";
}
System.out.println("\n         "+and);
System.out.println("\n1's complement "+compl);

for(n=0;n<8;n++)//to check ans if 0 or not using and op
{
if((and.charAt(n) & compl.charAt(n))=='0')
ans+=0;
else
ans+=1;
}

if(ans==0)
System.out.println("\n no error.. ");
else
System.out.println("\n error.. ");
}

}
class DjCheckSum2
{
public static void main(String args[])
{
int ch;
DjCheck1 obj=new DjCheck1();
obj.checksum();
}
}
/* output

Value 1: 11100101
Value 2: 00101011
              00100001

1's complement 11011110

 no error..

*/