This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
Originally posted by javaji: Is null a key word??? are true & false keywords??
No, none of these are keywords, keywords are modifiers, operators, primitive datatypes etc. null, true and false are literal values just like 1 or 2.0 (an integer and double literal). Since they are literal values, the are also reserved words which means that you cannot use them as identifiers.