public class ExtractSubstrings {
  public static void main(String[] args) {
    String text = "To be or not to be";          // String to be segmented
    int count = 0;                               // Number of substrings
    char separator = ' ';                        // Substring separator

    // Determine the number of substrings
    int index = 0;
    do {
      ++count;                                   // Increment count of substrings
      ++index;                                   // Move past last position
      index = text.indexOf(separator, index);
    } while (index != -1);

    // Extract the substring into an array
    String[] subStr = new String[count];         // Allocate for substrings
    index = 0;                                   // Substring start index
    int endIndex = 0;                            // Substring end index
    for(int i = 0; i < count; ++i) {
      endIndex = text.indexOf(separator,index);  // Find next separator

      if(endIndex == -1) {                       // If it is not found
        subStr[i] = text.substring(index);       // extract to the end
      } else {                                         // otherwise
        subStr[i] = text.substring(index, endIndex);   // to end index
      }
      
      index = endIndex + 1;                      // Set start for next cycle
    }

    // Display the substrings
    for(String s : subStr) {                     // For each string in subStr
      System.out.println(s);                     // display it
    }
  }
}