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ArrayIndexOutOfBoundsException Error - Tried debugging but still no solution

[1 Reply]
- 04-Jun-2011 12:12 AM
- Forum: Programming Questions
Hi, I've read up on the coding and also searched specifically for this error message. I've tried to debug but can't find the issue. Does anyone know what could be wrong with coding? FYI: Ive changed out URLs I'm using to keep it general.
This program is very simple. Its parses the first page for the first HREF it finds and then follows that link, opens up new page, does the same search for HREF and continues. The issue I'm having is making sure the HREF URL is not within parentheses but outside of them. but the error message is coming from somewhere else.
2. String[] lines;
3. String pTag = "<p>";
4. String hrefTag = "<a href=\"";
5. int count=0;
6. int i = 0;
7. String found;
8. String rightHREF;
9. String line;
10. String[] m1;
11. String[] m2;
12. String[] checkPara;
13. String[] checkPara2;
14. String para = "\\(";
15. String para2 = "\\)";
16. String domain = "http://www.domain.com";
17. String newHREF = "http://www.domain.com/specific_page";
19. void setup() {
20. search4URL(); // start searching
21. }
23. void search4URL() { // search url
24. while(count<15) { // search this number of urls
25. lines = loadStrings(newHREF); // Load new URL
26. println(newHREF+", i = "+ i + ", found = " + found + ", Array Length = "+ lines.length); // Debug, print NEW URL
27. //println(lines);
28. while(found == null) { // do this until you find first URL in body
29. m1 = match(lines[i], pTag); // check each line for <p> tag
30. if (m1 != null) { // if found a line with <p> then check if it has a url
31. //println("----in first tag loop"); // DEBUG
32. line = lines[i]; // extract line to test further
33. m2 = match(line, hrefTag); // check if line has url
34. if (m2 != null) { // if found a url then test and do extraction
35. while(rightHREF == null) { // Do this until you have extracted correct HREF
36. int beginPos = line.indexOf(hrefTag); // Get position of first HREF location
37. String textBefore = line.substring(0,beginPos); // Extract text before HREF
38. String s = line.substring(beginPos+9);// Extract text after HREF text
39. checkPara = match(textBefore, para); // Check if text before HREF has a "("
40. checkPara2 = match(textBefore, para2); // Check if text before HREF has a ")"
41. println("i = "+i+" , checkPara = "+checkPara+" , checkPara2 = "+ checkPara2);
42. if (checkPara != null) { // if there is an opening parentheses before HREF then
43. if (checkPara2 != null) { // and if there is a closing parentheses before HREF then link found is valid
44. int endPos = s.indexOf("\""); // Get position of end of URL
45. String href = s.substring(0,endPos); // Extract URL from text
46. newHREF = (domain + href); // Update newHREF with new URL
47. found = "1"; // Exit while (found) loop
48. rightHREF = "1";
49. } else { // Else then link found is within parentheses.
50. line = (s);
51. }
52. } else {
53. int endPos = s.indexOf("\""); // Get position of end of URL
54. String href = s.substring(0,endPos); // Extract URL from text
55. newHREF = (domain + href); // Update newHREF with new URL
56. found = "1"; // Exit while (found) loop
57. rightHREF = "1";
58. }
59. //println(newHREF);
60. m1 = null; // Exit m1 loop
61. m2 = null; // Exit m2 loop
62. checkPara = null;
63. checkPara2 = null;
64. }
65. } // End of URL found & Extraction loop
66. } // End of TAG found & find URL loop
67. i++; // Lets go to next line in page
68. } // End of searching whole page
69. i = 0; // reset line counter
70. found = null; // reset FOUND indicator
71. count++; // lets go to next URL
72. }
73. }
ERROR MESSAGE (it stops on line 29 in red above:
http://www.domain.com/specific_page/), i = 0, found = null, Array Length = 100

i = 61 , checkPara = null , checkPara2 = null

http://www.domain.com/second_page, i = 0, found = null, Array Length = 110

processing.app.debug.RunnerException: ArrayIndexOutOfBoundsException: 1080

at processing.app.Sketch.placeException(Sketch.java:1543)

at processing.app.debug.Runner.findException(Runner.java:583)

at processing.app.debug.Runner.reportException(Runner.java:558)

at processing.app.debug.Runner.exception(Runner.java:498)

at processing.app.debug.EventThread.exceptionEvent(EventThread.java:367)

at processing.app.debug.EventThread.handleEvent(EventThread.java:255)

at processing.app.debug.EventThread.run(EventThread.java:89)

Exception in thread "Animation Thread" java.lang.ArrayIndexOutOfBoundsException: 1080

at wiki_philosophy.search4URL(wiki_philosophy.java:52)

at wiki_philosophy.setup(wiki_philosophy.java:43)

at processing.core.PApplet.handleDraw(PApplet.java:1583)

at processing.core.PApplet.run(PApplet.java:1503)

at java.lang.Thread.run(Thread.java:680)
Thanks in advance!

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