i have written some code. please correct it

// For each character, it produces a hexadecimal number which is the hamming // code for 8-bit characters using even parity. These hex numbers are written to hamming.txt public class Hamming { private char letter; // The Ascii character with no parity bits private int[] bits = new int[12]; private int code; // The integer value of the character with the parity bits added public Hamming(char let) { letter = let; encode(); } public Hamming(int c) { code = c; decode(); } public int getCode() { return code; } public char getLetter() { return letter; } private void encode() { int value = letter; // Set value bits for (int i = 0; i < 12; i++) { if (i != 0 && i != 1 && i != 3 && i != 7) { bits[i] = value % 2; value /= 2; } } // Set parity bits bits[0] = bits[2] ^ bits[4] ^ bits[6] ^ bits[8] ^ bits[10]; // ^ is XOR in Java bits[1] = bits[2] ^ bits[5] ^ bits[6] ^ bits[9] ^ bits[10]; bits[3] = bits[4] ^ bits[5] ^ bits[6] ^ bits[11]; bits[7] = bits[8] ^ bits[9] ^ bits[10] ^ bits[11]; // compute integer code code = 0; for (int i = 11; i >= 0; i--) { code *= 2; code += bits[i]; } } private void decode() { int error = 0; int value = code; // Set the bit array for (int i = 0; i < 12; i++) { bits[i] = value % 2; value /= 2; } // Check for transmission errors if (bits[0] != (bits[2] ^ bits[4] ^ bits[6] ^ bits[8] ^ bits[10])) error += 1; if (bits[1] != (bits[2] ^ bits[5] ^ bits[6] ^ bits[9] ^ bits[10])) error += 2; if (bits[3] != (bits[4] ^ bits[5] ^ bits[6] ^ bits[11])) error += 4; if (bits[7] != (bits[8] ^ bits[9] ^ bits[10] ^ bits[11])) error += 8; // Correct Error if (error != 0) bits[error - 1] ^= 1; // Extract character letter = 0; for (int i = 11; i >= 0; i--) { if (i != 0 && i != 1 && i != 3 && i != 7) { letter *= 2; letter += bits[i]; } } // Display where error detected if (error != 0) System.out.println("Error in bit " + (error - 1) + " corrected in character " + letter); } public static void main(String[] args) { Scanner sc = new Scanner( new File("hamming.txt")); PrintStream outFile = new PrintStream(new File("output.txt")); String line; int code; System.out.println("File hamming.txt opened"); while (sc.hasNextInt(16)) { code = sc.nextInt(16); // Decode the Hex code to get a character // Create a Hamming object Hamming ham = new Hamming(code); // Display the decoded character outFile.print(ham.getLetter()); } sc.close(); System.out.println("File output.txt closed"); } }