 |
Author |
Topic: Vector of objects (Read 757 times) |
|
gabon
|
Vector of objects
« on: Dec 20th, 2004, 10:27pm » |
|
Hi guys I'm trying to use Vectors and I found a problem.
Considering a class like:
Code:
class RefObj
{
int id;
color col;
//
RefObj(int tid, color tcol){
id=tid;
col=tcol;
}
}
|
|
and a population like:
Code:
RefObj obj;
for(int i=0; i<10; i++){
obj=new RefObj(i,pixels[i]);
testVect.add(obj);
}
|
|
Hot to have access to a property of the object?
Code:
for(int i=0; i<10; i++){
println(testVect.get(i).id);
}
|
|
It says: no field named "id" was found in type "java.lang.Object".
Thx for any help, chr
|
|
|
|
|
fjen
|
Re: Vector of objects
« Reply #1 on: Dec 20th, 2004, 10:43pm » |
|
just "cast" it back to what it's supposed to be (... or is, actually).
side note: "obj" is not a good name since it seems to be used internally by processing.
and: you don't need to create an object in a variable to put that into the vector. you can directly create it inside when doing vec.add(new myObj());
Code:
class RefObj
{
int id;
color col;
RefObj(int tid, color tcol){
id=tid;
col=tcol;
}
}
Vector testVect;
void setup()
{
testVect = new Vector();
RefObj obj;
}
void draw()
{
for(int i=0; i<10; i++){
testVect.add( new RefObj(i,pixels[i]) );
}
for(int i=0; i<10; i++){
println(((RefObj)testVect.get(i)).id);
}
}
|
|
/F
|
|
|
|
|
gabon
|
Re: Vector of objects
« Reply #2 on: Dec 21st, 2004, 12:19am » |
|
yes, the cast... I'm happy to come back on these strongly typed rules 
Thank u florian, chr
|
|
|
|
|
fry
|
Re: Vector of objects
« Reply #3 on: Dec 21st, 2004, 2:34am » |
|
on Dec 20th, 2004, 10:43pm, fjen wrote:| side note: "obj" is not a good name since it seems to be used internally by processing. |
|
not that i know of, is it giving you an error
|
|
|
|
|
fjen
|
Re: Vector of objects
« Reply #4 on: Dec 21st, 2004, 3:19am » |
|
ha, right! you got me there. i got fooled by the error-message. should have read it 'til the end ...
"... However there is an accessible field ..."
/F
|
|
|
|
|
|
