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Topic: NullPointerException (Read 342 times) |
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drh28
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NullPointerException
« on: May 29th, 2004, 11:18pm » |
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Here is the code that causes the error. Any feedback is greatly appreciated.
BFont theFont = loadFont("Times_Italic.vlw");
textFont(theFont, 24);
ellipseMode(CENTER_RADIUS);
noStroke();
String[] input = loadStrings("data.txt");
println("Inputfile has " + input.length + " lines");
size(300,200);
background(0);
for (int i = 0; i < input.length; i++) {
println("Retrieving line " + i + " '" + input[i] + "'");
String[] words = splitStrings(input[i],',');
if (words.length < 2) continue;
String dataSource = words[0];
int dataPoint = Integer.parseInt(words[1]);
fill(240,240,240);
text(dataSource, 4, (i * 20) + 16);
fill(0,255,50);
ellipse(dataPoint + 80 , (i * 20) + 10, 4, 2);
}
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sspboyd
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Re: NullPointerException
« Reply #1 on: May 31st, 2004, 3:25pm » |
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Make sure your data.txt file is in your sketch data folder.
I just ran your code and got the same error as you but when I put a file in the data folder and called it data.txt the code works no problem.
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gmail.com w/ sspboyd username
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020200
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Re: NullPointerException:
« Reply #2 on: Nov 27th, 2004, 8:39pm » |
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I got the same error, but i can't see why!
Here ist my code:
Code:
///////////////////////////////////////////////////////
Drawline[] dlines;
int num = 20;
int i;
void setup() {
size(400,400);
framerate(25);
dlines = new Drawline[num];
for(i=0; i<num; i++) {
dlines = new Drawline[i];
}
}
///////////////////////////////////////////////////////
void loop() {
background(0);
dlines[1].update();
}
///////////////////////////////////////////////////////
class Drawline {
int mx;
int my;
Drawline() {
mx = int(random(400));
my = int(random(400));
}
void update() {
stroke(245);
line(mx, my, mouseX, mouseY);
}
}
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The error occurs at the line:
dlines[1].update();
// PLEASE HELP!!
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020200
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Re: NullPointerException
« Reply #3 on: Nov 27th, 2004, 8:46pm » |
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Ah, i found 'em Bastard myself!
Code:
void setup() {
size(400,400);
framerate(25);
dlines = new Drawline[num];
for(i=0; i<num; i++) {
dlines[i] = new Drawline(); //HERE was a the (syntax) error!
}
}
///////////////////////////////////////////////////////
void loop() {
background(0);
dlines[1].update(); /// this line was pretty valid!
}
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