Question With Switch Case Java - Topic

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Joined: Jul 30 2007

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Oct 16 2013 11:51am

I tried many solution to solve this but i can't find how.

i tried to do case ( 2 <= ageMembre || ageMembre => 3 ) ::
dosn't work be cause i want the ageMembre to be equal to 2 or equal to 3

any idea how to fix it?

Quote

if ( ageMembre < 14 ) { // Enfants
switch ( ageMembre){
case ( 2 < ageMembre > 3 ) :
switch (groupeAlim){
case 1 : portionMin = 4; portionMax = 4;
break ;
case 2 : portionMin = 3; portionMax = 3;
break;
case 3 : portionMin = 2; portionMax = 2;
break;
case 4 : portionMin = 1; portionMax = 1;
break;
default:
break;
}
case ( 5 < ageMembre > 8) :
switch (groupeAlimen) {
case 1 : portionMin = 5; portionMax = 5;
break ;
case 2 : portionMin = 4; portionMax = 4;
break ;
case 3 : portionMin = 2; portionMax = 2;
break ;
case 4 : portionMin = 1; portionMax = 1;
break ;
}
case ( 9 < ageMembre > 13) :
switch (groupeAlimen) {
case 1 : portionMin = 6; portionMax = 6;
break ;
case 2 : portionMin = 6; portionMax = 6;
break ;
case3 : portionMin = 3; portionMax = 4;
break ;
case 4 : portionMin = 1; portionMax = 2;
break ;
}// groupeAlim
} // ageMembre

This post was edited by pute_Fg on Oct 16 2013 11:52am

Onimo

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Oct 16 2013 01:02pm

ageMembre => 3 basically is 2 <= ageMembre.

Anyways if you want to see if it's 2 or 3, why not use that as first cases?

case 1:
break;
case 2:
break;
case 3:
break;
default:
break;

Not that nice but something to work with.

pute_Fg

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Joined: Jul 30 2007

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Oct 16 2013 01:45pm

Quote (Onimo @ 16 Oct 2013 14:02)

what i want is if the ageMembre = 2 then do the First switch. if ageMembre = 12 then do the Switch #3. but i don't know how to do it in a case parentheses

rockonkenshin

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Oct 16 2013 01:46pm

What you are doing does not work in Java. Either rewrite that as an if-else if-else block or fix your case statements to not include the comparison operations.

pute_Fg

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Joined: Jul 30 2007

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Oct 16 2013 01:59pm

Quote (rockonkenshin @ 16 Oct 2013 14:46)

What you are doing does not work in Java. Either rewrite that as an if-else if-else block or fix your case statements to not include the comparison operations.

i changed the comparison operations for case ( 5 & 8 ) . Should it work?

labatymo

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Oct 16 2013 02:08pm

Quote (pute_Fg @ Oct 16 2013 03:59pm)

i changed the comparison operations for case ( 5 & 8 ) . Should it work?

you can't use comparison operators in a switch. a comparison operation returns a boolean and switches don't work with booleans

carteblanche

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Oct 16 2013 04:25pm

Quote (labatymo @ Oct 16 2013 04:08pm)

you can't use comparison operators in a switch. a comparison operation returns a boolean and switches don't work with booleans

Quote (pute_Fg @ Oct 16 2013 03:59pm)

i changed the comparison operations for case ( 5 & 8 ) . Should it work?

Plus that's a bitwise operator, not a boolean operator.

The whole point of switch statements is to build a lookup table ahead of time. So it has to be constant.

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