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Return, goto and default are keywords in the Java language. for, while and next are keywords in the Java language. Is this a complete and legal comment? /* // */ Select the one right answer. (a) No, the block comment (/* ... ) comments out the closing part. (b) It is a completely valid comment. The // part is ignored by the compiler. (c) This combination of comments is illegal and the compiler will reject it. 1 gives an overview of the primitive datatypes in Java. Primitive datatypes in Java can be divided into three main categories: • Integral types consisting of integers and characters: Integer datatypes are byte, short, int and long.

A floating-point literal can also be specified to be a float by appending the suffix F (or f). e. 5, where E (or e) stands for Exponent. Boolean Literals Boolean truth-values can be denoted using the reserved literals true or false. Character Literals A character literal is quoted in single-quotes ('). All characters are represented by 16-bit Unicode. The Unicode character set subsumes the 8-bit ISO-Latin-1 and the 7-bit ASCII characters. 7, note that digits (1 to 9), upper-case letters (A to Z) and lower-case letters (a to z) have contiguous Unicode values.

Note that a reference variable is initialized with the value null. 1 Default Values for Member Variables class Light { // Static variable static int counter; // Instance variables int noOfWatts = 100; boolean indicator; String location; // Default value 0 when class is loaded. // Explicitly set to 100. // Implicitly set to default value false. // Implicitly set to default value null. 1 illustrates default initialization of member variables. Note that static variables are initialized when the class is loaded the first time, and instance variables are initialized accordingly in every object created from the class Light.

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