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Index › Programming Questions & Help › Syntax Questions › Importing java classes/libraries
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Importing java classes/libraries (Read 611 times)
omouse
Importing java classes/libraries
Nov 21st, 2008, 6:47pm  
Is it possible to import Java classes such as java.util.regex.Matcher or java.util.zip.ZipFile from within a Processing file?
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koogy
Re: Importing java classes/libraries
Reply #1 - Nov 21st, 2008, 7:11pm  
yes
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omouse
Re: Importing java classes/libraries
Reply #2 - Nov 21st, 2008, 7:17pm  
Any hints or example code to guide me on how to do that?
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koogy
Re: Importing java classes/libraries
Reply #3 - Nov 21st, 2008, 7:23pm  
8) i was going to explain but thought a boolean answer would be funnier.

if you 'export as application' and then look at the produced java source you'll see something like

Code:

import processing.core.*; 
import java.applet.*; 
import java.awt.*; 
import java.awt.image.*; 
import java.awt.event.*; 
import java.io.*; 
import java.net.*; 
import java.text.*; 
import java.util.*; 
import java.util.zip.*; 

public class sketch_081121c extends PApplet {

  public void setup() {
  //...
  }

  public void draw() {
  // ...
  }

  static public void main(String args[]) {
    PApplet.main(new String[] { "sketch_081121c" });
  }
}


so you get all of those things for free (which is how you can use println() without the System.out for instance).

i think it's just a case of
import classname;
as usual. did you try that?
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koogy
Re: Importing java classes/libraries
Reply #4 - Nov 21st, 2008, 7:31pm  
Code:

import java.util.regex.*;

void setup() {
  Pattern p = Pattern.compile("o w");
  Matcher m = p.matcher("hello world");
  boolean b = m.find(); 
  println("Found: " + b);
}


seems fine.
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fry
Re: Importing java classes/libraries
Reply #5 - Nov 21st, 2008, 7:43pm  
koogy wrote on Nov 21st, 2008, 7:31pm:
seems fine.

And using match() is even finer:
http://processing.org/reference/match_.html
Wink

And I think there are examples of using ZIP archives elsewhere on the board.
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PhiLho 
Re: Importing java classes/libraries
Reply #6 - Nov 21st, 2008, 10:43pm  
koogy wrote on Nov 21st, 2008, 7:23pm:
so you get all of those things for free (which is how you can use println() without the System.out for instance).

For the record, actually you can use println because it is defined in PApplet class...

Good demonstration, otherwise. :-)
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