JavaME: Convert String to camelCase

Question

What would be a simple implementation of a method to convert a String like "Hello there everyone" to "helloThereEveryone". In JavaME support for String and StringBuffer utility operations are quite limited.

Answer 1

Suggestion:

May be if you can port one regexp library on J2ME, you could use it to strip spaces in your String...

Answer 2

Quick primitive implementation. I have no idea of restrictions of J2ME, so I hope it fits or it gives some ideas...

String str = "Hello, there, everyone?";

StringBuffer result = new StringBuffer(str.length());
String strl = str.toLowerCase();
boolean bMustCapitalize = false;
for (int i = 0; i < strl.length(); i++)
{
  char c = strl.charAt(i);
  if (c >= 'a' && c <= 'z')
  {
    if (bMustCapitalize)
    {
      result.append(strl.substring(i, i+1).toUpperCase());
      bMustCapitalize = false;
    }
    else
    {
      result.append(c);
    }
  }
  else
  {
    bMustCapitalize = true;
  }
}
System.out.println(result);

You can replace the convoluted uppercase append with:

result.append((char) (c - 0x20));

although it might seem more hackish.

Answer 3

With CDC, you have:

String.getBytes();//to convert the string to an array of bytes String.indexOf(int ch); //for locating the beginning of the words String.trim();//to remove spaces

For lower/uppercase you need to add(subtract) 32.

With these elements, you can build your own method.