JavaProb/BinaryModular.java at main · Warlord27/JavaProb · GitHub

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import java.util.Scanner;

public class BinaryModular {

// Converts a string to its binary representation

static String wordToBinary(String s) {

StringBuilder binaryRepresentation = new StringBuilder();

for (int i = 0; i < s.length(); i++) {

int asciiValue = (int) s.charAt(i);

String binary = Integer.toBinaryString(asciiValue); // Convert ASCII value to binary

binaryRepresentation.append(binary).append(" ");

}

return binaryRepresentation.toString().trim();

}

// Converts a number to its binary representation

static String numberToBinary(long s) {

return Long.toBinaryString(s); // Directly convert number to binary

}

// Converts binary representation back to a string

static String binaryToWord(String binary) {

StringBuilder text = new StringBuilder();

for (String bin : binary.split(" ")) {

int asciiValue = Integer.parseInt(bin, 2); // Parse binary to integer

text.append((char) asciiValue); // Convert ASCII value to character

}

return text.toString();

}

// Converts binary representation back to a number

static long binaryToNumber(String binary) {

return Long.parseLong(binary, 2); // Parse binary to long

}

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);

System.out.println("Choose an option: ");

System.out.println("1. Encode a message to binary");

System.out.println("2. Decode a binary message");

int choice = sc.nextInt();

sc.nextLine(); // Consume the newline character

if (choice == 1) {

// Encoding

System.out.println("Enter the message: ");

String s = sc.nextLine(); // Read the entire line

StringBuilder message = new StringBuilder();

for (String token : s.split("\\s+")) { // Split input by spaces

if (token.matches("\\d+")) { // Check if the token is a number

long num = Long.parseLong(token);

message.append(numberToBinary(num)).append(" ");

} else {

message.append(wordToBinary(token)).append(" ");

}

System.out.println("Binary Encoded Message: " + message.toString().trim());

} else if (choice == 2) {

// Decoding

System.out.println("Enter the binary message to decode: ");

String binaryMessage = sc.nextLine();

StringBuilder decodedMessage = new StringBuilder();

for (String token : binaryMessage.split("\\s+")) { // Split input by spaces

if (token.matches("[01]+")) { // Check if the token is binary

try {

// Decode as a character

decodedMessage.append(binaryToWord(token));

} catch (NumberFormatException e) {

System.out.println("Invalid binary input: " + token);

}

decodedMessage.append(" "); // Preserve spaces between words

}

System.out.println("Decoded Message: " + decodedMessage.toString().trim());

} else {

System.out.println("Invalid choice. Please restart the program.");

}

JavaProb/BinaryModular.java at main · Warlord27/JavaProb · GitHub

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