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Topic: importing java classes? (Read 508 times) |
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kevinP
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importing java classes?
« on: Jan 31st, 2004, 6:44pm » |
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I did try searching on this...
I'd like a date or time function that gives me something like epoch time so that I can do a date calculation. (Actually I thought this was available in Processing).
So how do I import a java class? I got as far as trying:
Code:
import java.util.Calendar;
public class Test extends BApplet {
Calendar cal;
void setup()
{
size(200, 200);
background(0);
stroke(153, 153, 0);
cal = new Calendar;
BFont fontA = loadFont("Meta-Bold.vlw.gz");
textFont(fontA, 44);
// etc.
}
}
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...but I'm still getting errors, for example, "expecting EOF, found 'textFont'".
-K
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| « Last Edit: Jan 31st, 2004, 6:46pm by kevinP » |
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Kevin Pfeiffer
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Koenie
  
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Re: importing java classes?
« Reply #1 on: Jan 31st, 2004, 7:28pm » |
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In this case I think the problem is you got 'cal = new Calendar;' This should be 'cal = new Calendar();' since it's a constructor method.
Koenie
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http://koeniedesign.com
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kevinP
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Re: importing java classes?
« Reply #2 on: Jan 31st, 2004, 9:24pm » |
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on Jan 31st, 2004, 7:28pm, Koenie wrote:| In this case I think the problem is you got 'cal = new Calendar;' This should be 'cal = new Calendar();' since it's a constructor method. |
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I think I was also misusing the class. java.util.Date worked fine. I will spend a few more minutes studying the java docs for both of them.
-K
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Kevin Pfeiffer
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kevinP
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Re: importing java classes?
« Reply #3 on: Feb 1st, 2004, 6:51pm » |
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Hi all,
Here's what I came up with (countdown for spring graduation)...
http://www.tiros.net/pfeiffer/processing/2004/countdown/
Nothing fancy, but a chance to learn more about the programming.
I need to ask a question in case someone has time to look at the code.
To import an additional class I ended up doing this:
Code:
import java.util.Date;
public class Countdown extends BApplet {
// variables initialized, etc.
void setup()
{
//
days = countdown(y, m, d);
//
}
void loop()
{
// some messy, slightly redundant code
}
int countdown(int _y, int _m, int _d)
{
int msDay = 86400000; // millseconds in a day
Date date1 = new Date();
Date date2 = new Date(_y, _m, _d);
return Math.round((date2.getTime() - date1.getTime()) / msDay);
}
}
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I wonder if there is a better way to organize this? It was a bit confusing. I think that the strength (and weakness) of Processing for me is that it lets you write procedural programs in an OO-environment.
Does it make any difference what I call this extension of BApplet?
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| « Last Edit: Mar 20th, 2004, 1:37am by kevinP » |
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Kevin Pfeiffer
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