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  checking for variable type  (Read 524 times)
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Offline ado

Senior Newbie





« Posted 2012-11-23 01:23:58 »

Hey all
I was wondering if there was any way to have a constructor take a variable with an ambigious type and check its type via if statment. Here's the pseudo of what I mean:

drawStuff(Graphics g, Type s){
c;
if(s.getType==Canvas){
c.setType(s)
}elseif(s.getType==Window){
c.setType(s)
}else{print.out('unrecognized type')}
//draw stuff using c}

I guess I could pass in a string with 'Canvas' or 'window' and check that with the if statement but I as wondering if there was a built in way of doing this that is maybe a little more efficient.
Thanks in advance
Offline counterp

Senior Duke


Medals: 11



« Reply #1 - Posted 2012-11-23 01:41:29 »

You can pass an Object as an argument and use the 'instanceof' keyword like:

1  
2  
 if (obj instanceof Window) {
...
Offline ado

Senior Newbie





« Reply #2 - Posted 2012-11-23 01:50:26 »

Ah great. Thanks for that, that was exactly what I was after
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Offline RobinB

JGO Ninja


Medals: 44
Projects: 1
Exp: 3 years


Spacegame in progress


« Reply #3 - Posted 2012-11-23 17:35:39 »

You can pass an Object as an argument and use the 'instanceof' keyword like:

1  
2  
 if (obj instanceof Window) {
...


But this is kinda nasty, better make use of polymorphism.
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