Enum doubt

[sudha javvadi]

source : http://www.ejavaguru.com/scjp5freemockexam.php#enumq3
doubt : I think we need to put ; after line 4. In K&B book page 65 ,there it mentioned we require ; if more code follows. pls clarify.

Q3)
What is the output of the following code:
line1> public enum Day {
line2>MONDAY (1),
line3>TUESDAY (2),
line4>WEDNESDAY (3) {public String toString() { return "Good Morning"; } },
line5>THURSDAY (4),
line6>FRIDAY (5),
line7>SATURDAY (6),
line8>SUNDAY (7);
line9>
line10>int dayNumber;
line11>
line12>Day (int dayNumber) {
line13>this.dayNumber = dayNumber;
line14>}
line15>
line16>public static void main (String[] args) {
line17>for (Day d : Day.values())
line18>System.out.println (d);
line19>}
line20>}

Options:
a) Compilation error at line number 4 : Invalid code.
b) Executes OK giving OUTPUT:
MONDAY
TUESDAY
Good Morning
THURSDAY
FRIDAY
SATURDAY
SUNDAY

c) Runtime error : Cannot execute enum 'Day' as a standalone application.
d) Executes OK giving OUTPUT:
MONDAY
TUESDAY
WEDNESDAY
THURSDAY
FRIDAY
SATURDAY
SUNDAY

Ans: b

[Lucky J Verma]

That we need to put semicoln if more code follows
is true at line 8 .where are constants have been declared but more enum code is yet to be done.
but on line 6, its only one constant being declared.

[Meera Nanda]

Hi Sudha,

The answer to the above question is "b" without making any changes to the code.
MONDAY
TUESDAY
Good Morning
THURSDAY
FRIDAY
SATURDAY
SUNDAY

Thanks,
Meera

[ahmed yehia]

sudha javvadi said

I think we need to put ; after line 4. In K&B book page 65 ,there it mentioned we require ; if more code follows. pls clarify.

You need to put a semicolon when you have enum body, not when you have enum type body.

    
enum numbers {ONE, TWO, THREE}; // semicolon is optional

 
enum numbers {ONE, TWO, THREE; // semicolon is required
void someMethod() {}
}