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Need Help with reading strings from an external text file

[2 Replies]
- 01-May-2013 09:07 AM
- Forum: Programming Questions
I need of some help with my processing program that i am doing for a college assignment.
It works until you try and take a value from the external file using the scanner class.

I have very little knowledge of Java with processing so I would appreciate some help with this please.

main class - WordRipple
import processing.core.*;
2. import java.io.File;
3. import java.io.FileNotFoundException;
4. import java.util.*;
6. public class WordRipple extends PApplet{
8. ArrayList<Ripple> ripples;
9. int rippleWidth = 10;
12. public void setup() {
13. size(500, 500);
14. smooth();
15. noStroke();
17. ripples = new ArrayList<Ripple>();
18. ripples.add(new Ripple(this, width/2, height/2, rippleWidth));
20. //colorMode(HSB, 360, 100, 100);
22. textAlign(CENTER);
23. }
25. public void draw() {
26. background(360);
28. Ripple ripple;
29. for (int i=0; i<ripples.size(); i++) {
30. ripple = ripples.get(i);
31. ripple.wave();
32. ripple.display();
33. if (ripple.finished()) {
34. ripples.remove(i);
35. }
36. }
37. }
40. public void mousePressed() {
41. float x, y;
42. // double x, y;
43. for (int i=1; i<=10; i++) {
44. //double z = 36*i;
45. //float z = 36*i;
46. x = mouseX;// + 100 * sin(radians(z));
47. y = mouseY;// - 100 * cos(radians(z));
48. ripples.add(new Ripple(this, x, y, rippleWidth));
49. }
50. }
51. }
and my second class - Ripple
2. import processing.core.*;
4. import java.io.File;
5. import java.io.FileNotFoundException;
6. import java.util.Scanner;
7. import javax.swing.JOptionPane;
9. public class Ripple extends PApplet {
13. public Ripple(String stringRead) throws FileNotFoundException {
15. File inputFile = new File( "input.txt" );
16. try
17. {
18. Scanner scan = new Scanner(inputFile);
20. while ( scan.hasNext( ) )
21. {
22. // read next String
23. stringRead = scan.nextLine( );
24. // process the value read
25. System.out.println( stringRead );
27. }
28. //release resources associated with string.txt
29. scan.close();
30. }
32. catch (FileNotFoundException fnfe)
33. {
34. System.out.println("Unable to find input.txt, exiting");
35. fnfe.printStackTrace();
36. }
37. }
39. //String words = "HELLOWORLD";
40. String words = stringRead;
41. int len = words.length();
43. float angle = 360 / len;
44. int radius = 50;
46. PApplet papplet;
48. float x, y, w;
49. float life;
53. public Ripple(PApplet p, float x, float y, float w) {
54. papplet = p;
55. this.x = x;
56. this.y = y;
57. this.w = w;
58. this.life = 75;
59. }
61. public void wave() {
62. w += w/30;
63. }
65. public boolean finished() {
66. life--;
67. if (life < 0) {
68. return true;
69. }
70. else {
71. return false;
72. }
73. }
74. public void display() {
75. papplet.pushMatrix();
76. papplet.translate((float)(x), (float)(y));
77. for (int i = 0; i < len; i++) {
79. papplet.pushMatrix();
81. papplet.rotate(radians(i * angle - 90));
82. papplet.translate((float)(radius*1.8),0);
83. papplet.rotate(radians(90));
84. papplet.fill(i * angle * 100 / 360, 100, 100, life);
85. papplet.textSize(w);
86. papplet.text(words.charAt(i), 0, 0);
87. papplet.popMatrix();
88. }
89. papplet.popMatrix();
90. }
91. }
Kind Regards,
Barry

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