"A Java exception has occurred"

fdansv

"A Java exception has occurred"

in Integration and Hardware • 1 year ago

Hi, I have a problem that's driving me nuts. I'm writing a sketch involving maps with unfolding and csv. It works fine within processing, but when I export the applet and try to run the JAR, it returns a dialog saying "A Java exception has occurred". I have JRE 7, Processing 1.5.1 and Windows 7 32bit.

Thanks a lot in advance. The code (which runs perfectly) is the following:

import processing.opengl.*;
import codeanticode.glgraphics.*;
import de.fhpotsdam.unfolding.mapdisplay.*;
import de.fhpotsdam.unfolding.utils.*;
import de.fhpotsdam.unfolding.marker.*;
import de.fhpotsdam.unfolding.tiles.*;
import de.fhpotsdam.unfolding.interactions.*;
import de.fhpotsdam.unfolding.*;
import de.fhpotsdam.unfolding.core.*;
import de.fhpotsdam.unfolding.geo.*;
import de.fhpotsdam.unfolding.events.*;
import de.fhpotsdam.utils.*;
import de.fhpotsdam.unfolding.providers.*;
PImage mapa, tram;
float[] mightymarblesx, mightymarblesy, rem;
int timestart, elapsed;
String[] stations, coordinates, copyc, code;
boolean refresh=true;
de.fhpotsdam.unfolding.Map map;
public void setup() {
size(1126, 481);
smooth();
mapa=loadImage("map.png");
tram=loadImage("tram.png");
timestart=second()+minute()*60;
coordinates=loadStrings("http://sfmunidata.sytes.net/coordinates.csv");
stations=loadStrings("http://sfmunidata.sytes.net/coordsofdabitch.csv");
code=loadStrings("http://sfmunidata.sytes.net/ID.txt");
noStroke();
mightymarblesx=new float[coordinates.length];
mightymarblesy=new float[coordinates.length];
map=new de.fhpotsdam.unfolding.Map(this);
map = new de.fhpotsdam.unfolding.Map(this, "Cloudmade Map", 0, 0, width, height, true, false,
new OpenStreetMap.CloudmadeProvider(MapDisplayFactory.OSM_API_KEY, 1913));
map.zoomAndPanTo(new Location(37.756f,-122.443f),12);
MapUtils.createDefaultEventDispatcher(this,map);
}
public void draw() {
//image(mapa, 0, 0);
map.draw();
elapsed=(second()+minute()*60)-timestart;
if (elapsed>5) {
println("SENDING REFRESHMENT");
refresh=true;
}
updateposition();
/* ########################################################
TEXT AND VEHICLES:
######################################################## */
for (int i=0;i<mightymarblesx.length;i++) {
// Point coord = latlon_to_screen(new latLon(mightymarblesx[i], mightymarblesy[i]));
Location vehloc=new Location(mightymarblesx[i],mightymarblesy[i]);
float xy[]=map.getScreenPositionFromLocation(vehloc);
textAlign(CENTER);
fill(0);
text(split(coordinates[i], ",")[0],xy[0],xy[1]);
image(tram,xy[0],xy[1],20,20);
}
/* ########################################################
MARKERS FOR THE STATIONS:
######################################################## */
for (int i=0;i<stations.length;i++) {
float lat=float(split(stations[i], ",")[0]);
float lon=float(split(stations[i], ",")[1]);
Location staloc=new Location(lat,lon);
float xy[]=map.getScreenPositionFromLocation(staloc);
// Point coord = latlon_to_screen(new latLon(lat, lon));
fill(255, 0, 0);
ellipse(xy[0], xy[1], 1, 1);
}
}
public void updateposition() {
if (refresh) {
println("REFRESHING");
try{
if (code[0].equals(loadStrings("http://sfmunidata.sytes.net/ID.txt")[0])==false) {
code=loadStrings("http://sfmunidata.sytes.net/ID.txt");
try {
coordinates=loadStrings("http://sfmunidata.sytes.net/coordinates.csv");
timestart=second()+minute()*60;
mightymarblesx=new float[coordinates.length];
mightymarblesy=new float[coordinates.length];
}
catch (Exception e) {
coordinates=copyc;
}
}
}catch (Exception e) {}
copyc=coordinates;
refresh=false;
}
for (int i=0;i<coordinates.length;i++) {
String[] elements= split(coordinates[i], ',');
String[] hour= split(elements[7]," ");
float timebefore= float(hour[0])*60+float(hour[1]);
float timenow= minute()*60+second();
float actual=timenow-timebefore;
String stationcode=elements[0];
float seconds=float(elements[1]);
float totseconds=float(elements[2]);
float lat=float(elements[3]);
float lon=float(elements[4]);
float lat2=float(elements[5]);
float lon2=float(elements[6]);
float cartesianlat=map(seconds-actual, totseconds, 0, lat, lat2);
float cartesianlon=map(seconds-actual, totseconds, 0, lon, lon2);
mightymarblesx[i]=cartesianlat;
mightymarblesy[i]=cartesianlon;
}
}

Replies(3)

PhiLho

Re: "A Java exception has occurred"

1 year ago

Well, as we cannot run your code, a bit more information would be welcome. Do you see the exception in the Java console? Can you report it fully?
One thing that can happen is that you try to access an external site: you cannot do that in an applet, unless you sign the jar. Did you do that?

fdansv

Re: "A Java exception has occurred"

1 year ago

On the title of the dialog says "Java Virtual Machine Launcher". I tried by reinstalling JVM, as well as JRE, but it didn't solve it. After you mentioned it, I changed all the external urls for internal paths, but the problem persists. The Java console doesn't record anything. I'll try with a different computer to see if this changes anything.

tillnm

Re: "A Java exception has occurred"

1 year ago

Generally, I am assuming it might be due to some OpenGL issues (even though it seems you are not using it). There always have been some strange JOGL/native/security issues with OpenGL in applets. See http://code.google.com/p/processing/issues/detail?id=429 - but not sure if updating to the alpha Processing fixes this. I am facing problems here, too (new computer).

Alternatively, as phi.lho mentioned, in applets you might not be allowed to access external sites, but (besides your CSV loading) you are using Unfolding in a way to load the map tiles externally (from the CloudMade server). As long as you are trying it out locally (i.e. via file://), it should work, but if you want to deploy that on a web server for others to access, you may run into security issues. It works for me, though (Mac OS X 7.3, Java 1.6.0, i.e. without OpenGL).

So, in any case, having the actual error message would be necessary to try fixing it. Try to switch on the Java Console for the browser, so you can see the exceptions. (Not sure on Windows, but on Mac you have to enable it, and potentially further Java properties, such as logging etc.) It might be various things.

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