Help needed for developing F5 code (for image steganography)

F5Random random = new F5Random(password.getBytes());
Permutation permutation = new Permutation(coeff.length, random);
int k = determineCodeParameter(coeff, embeddedData.available());
n = (1<<k)-1;
if (n > 1) { //use matrix encoding (1, n, k)
int kBitsToEmbed; int extractedBit; int hash; int s;
int[] codeWord = new int[n]; int startOfN=0; int endOfN=0;
embeddingLoop:
for (;;) { //End continuous loop
if (embeddedData.available()==0)
break; //End of message, leave end continuous loop
kBitsToEmbed = embeddedData.readBits(k);
do { //embed k bits
j = startOfN;
for (i=0; i22 if (j>=coeff.length) //

break embeddingLoop; // beende Endlosschleife
shuffledIndex = permutation.getShuffled(j);
if (shuffledIndex%64 == 0) continue; // skip DC
if (coeff[shuffledIndex] == 0) continue; // skip 0
codeWord[i++]=shuffledIndex;
}
endOfN = j; //notice codeword end
hash = 0;
for (i=0; i<n;>34 if (coeff[codeWord[i]] > 0)
extractedBit = coeff[codeWord[i]]&1;
else
extractedBit = 1-(coeff[codeWord[i]]&1);
if (extractedBit == 1)
hash ^= i+1;
}
s = hash ^ kBitsToEmbed;
if (s==0) break; //no change is necessary
if (coeff[codeWord[--s0) // decrement amount
coeff[codeWord[s]]--;
else
coeff[codeWord[s]]++;
} while (coeff[codeWord[s]]==0); 
startOfN = endOfN; // continue with new coefficients
}
} else ... // without matrix coding