如何将字符串划分为char数组

Question

I am trying to divide a string into char arrays. I have a program that converts a char array (of 7 chars) from binary to ASCII text. So what I am trying to do is break a string up into char arrays of 7 chars in 'Arduino code' or in C, C++ or Java. Any suggestions? Thanks!

Edit:

Here is the program that I am using:

String getText(String str) {

  String text = "";

  char bits[] = "1001000";
  char new_char = 0;

  for (int i = 7; i >= 0; i--)
  {

    int current_bit = bits[i] - '0';
    new_char |= current_bit << (7-i);

  }

  text += (String) new_char + "";

  return text;

}

Answer 1

You can use:

String s = "java";
char[] ch = s.toCharArray();

UPDATE
Well, I am watching this post after I saw a red (-2) point in my reputation list. And to my surprise the question is different from what it had been posted for Which I had answered. Now after reading your Edited question I am posting the new answer . You can use Integer.parseInt() method to achieve what you are looking for in Java . Here is the short demo of how this method could be used:

class  BinaryToWords
{
    static String returnString(String input)
    {
        String parts[] = input.split("\\s+");
        StringBuilder sBuilder = new StringBuilder();
        for (String part : parts)
        {
            int i = Integer.parseInt(part, 2);//Parses the string argument(part) as a signed integer in the radix(2).
            char ch = (char)i;
            sBuilder.append(String.valueOf(ch));
        }
        return sBuilder.toString();
    }
    public static void main(String[] args) 
    {
        String binary = "1001000 1100101 1101100 1101100 1101111 100000 1010111 1101111 1110010 1101100 1100100";//Input the binary format.
        System.out.println(returnString(binary));
    }
}

The output for the above code is:

Hello World

You can check this for other inputs too..And let me know if it working fine for all acceptable inputs.

Answer 2

What do you mean? AC\\C++ string is essentially an array of character.. If you have a pointer to a char (=string) then there's your array. Otherwise if you have an std::string, you can use its .c_str() method.