Running program gives me a small grey box; problem not draw() or setup()

Programming Questions

johnnyboy..

Running program gives me a small grey box; problem not draw() or setup()

in Programming Questions • 2 years ago

EDIT: Well some of my code was lost when I pasted it here, but hopefully they were just small details.

When I run my program (which isn't finished), I don't get a 700x700 window as specified. It just gives me a small grey box. I assumed the problem was in setup() or draw(), but it didn't reach any println() statements I tried so I think the problem is in one of my other methods or my private class. Basically, I'm looking for where my problem is: why my applet doesn't have the specified values. Here is the code:

import java.io.*;
import java.net.URL;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
BufferedReader reader;
class GeoTrends extends PApplet{
TwitterSearcher ts = new TwitterSearcher();
//GoogleSearcher gs = new GoogleSearcher();
void setup(){
println("here");
size(700, 700);
println("got here");
background(255);
println("and here!");
fill(0);
PFont f = loadFont("Calibri-20.vlw");
textFont(f);
}
void draw(){
println("rawr");
text("Searching Twitter for #" + ts.loc + "...", 50, 50);
text(ts.url, 50, 100);
}
private class TwitterSearcher {
String loc, url;
ArrayList<String> tweetList;
public TwitterSearcher(){
loc = makeURLFriendly(JOptionPane.showInputDialog("location to search for"));
url = "http://search.twitter.com/search.json?q=%23" + loc + "&max_results=10";
this.getTweets(url);
}
public String makeURLFriendly(String s){
s = s.replace(" ", "+");
s = s.toLowerCase();
return s;
}
public void getTweets(String url){
tweetList = new ArrayList<String>(20);
String currLine = "";
String newTweet = "";
reader = createReader(url);
try {
// while (currLine != null) {
currLine = reader.readLine();
} catch (IOException e) {
e.printStackTrace();
currLine = null;
}
if (currLine == null) {
noLoop();
}
else if (currLine.contains("'text':")) {
newTweet = (String) currLine.subSequence(currLine.indexOf("'text':"),
currLine.indexOf(",'to_user"));
tweetList.add(newTweet);}
}
} //end of class TwitterSearcher
private class GoogleSearcher{
}
} //end of file

Any help or suggestions would be appreicated!

Replies(8)

kevinsa5

Re: Running program gives me a small grey box; problem not draw() or setup()

2 years ago

I think you added this after you noticed the problem, but I think it's rather important to have size() be the first method in setup().

EDIT: also, you don't have a constructor in your GoogleSearcher class but you still create an instance of it in your program. Try making a basic contructor method and seeing if that fixes it?

johnnyboy..

Re: Running program gives me a small grey box; problem not draw() or setup()

2 years ago

I think you added this after you noticed the problem, but I think it's rather important to have size() be the first method in setup().

EDIT: also, you don't have a constructor in your GoogleSearcher class but you still create an instance of it in your program. Try making a basic contructor method and seeing if that fixes it?

Thanks for the reply! However I still had the problem when size() was first in setup(). Also, "GoogleSearcher gs..." is commented out, and I plan to actually fill out the GoogleSearcher class later.

johnnyboy..

Re: Running program gives me a small grey box; problem not draw() or setup()

2 years ago

Bump.

Sorry, not to be impatient, but I actually need some help ASAP.

I will gladly give a better explanation of the problem if need be.

kevinsa5

Re: Running program gives me a small grey box; problem not draw() or setup()

2 years ago

ah yes. heh heh, missed the comment mark

erm, why is it all wrapped in a class? I'm not saying that it's wrong (it's your code :P) but I've never seen that done before. I'm referring to the "class GeoTrends extends PApplet{" part at the top.

johnnyboy..

Re: Running program gives me a small grey box; problem not draw() or setup()

2 years ago

Yeah, unfortunately my assignment requires me to code in Java mode.

I feel like it would be much simpler if I left it as is!

kevinsa5

Re: Running program gives me a small grey box; problem not draw() or setup()

2 years ago

Shoot, I'm sorry. All I can say is simplify your code until it works and see what's wrong, but you knew that already.

Maybe the BufferedReader declaration outside the class? I don't have experience with "Java mode" (read: never heard of it), but to my understanding in regular java it's ill-advised to declare variables outside the class.

amnon.owed

Re: Running program gives me a small grey box; problem not draw() or setup()

2 years ago

The problem is that your sketch doesn't have a setup() and draw() method. Like any empty sketch it will return to the default settings, which is "a small grey box". I think the main problem is that you are mixing up working in the Processing IDE versus working in a program like Eclipse.

There are a few possible solutions:

1. Remove line 11 and the corresponding closing bracket. Behind the scenes the Processing sketch extends PApplet. This is one of the things Processing does to make life easier for us. You don't have to do it manually.

2. Use Eclipse. Then you HAVE to do it manually. So you would need to extend PApplet and be able / need to write it like you did. Plus you would have to import the Processing core. See the forum, wiki etc.

3. Move the general setup() and draw() methods outside the GeoTrends class and have an instance of the remaining class to do the twitter stuff (which of course could include some kind of display method).

PhiLho

Re: Running program gives me a small grey box; problem not draw() or setup()

2 years ago

amnon.owed, the OP wrote he works in Java mode, I suppose it means he works in Eclipse (I hope he doesn't compile from the command line!).
Now, your other remarks, particularly importing core, are valid.

Mmm, although indeed it shouldn't even compile, so perhaps you are right. Perhaps he tries to run this code from the PDE!
So, johnnyboy210, what environment do you use?

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