603: Highlights

• Strings are constants. You cannot add to, delete from, or change the characters in strings.
• If you want to determine the length of a string, then instantiate the following pattern:

  string.length() 
  

• If you want to extract a character from a string, then instantiate the following pattern:

  string.charAt(index) 
  

• If you want to concatenate two strings, to create a new string, then instantiate the following pattern:

  first string + second string 
  

• If you want to denote a character, then surround that character with single quotation marks.
• If you want a tokenizer to return a token for the end of a line, then instantiate the following pattern:

  token variable.eolIsSignificant(true);                       
  

• If you want to know whether the current token represents the end of a line, then compare the value produced by nextToken to the TT_EOL instance variable:

  nextToken's value == token variable.TT_EOL 
  

• If you want a tokenizer to use the double quotation mark to delimit strings with embedded spaces, then instantiate the following pattern:

  token variable.quoteChar((int) '"');