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POReading from file and sort into subsets
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8055627
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2011-11-08T18:54:05.333
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2011-11-10T13:37:47.723
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2011-11-08T20:33:16.657
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I am working on a project where I need to read a bunch of floating point integers from a file and sort them into subsets. The subsets need to be sorted by their distance apart. I need to first pull the first element out of the file and use that as the distance comparison d. Then take the next element a and put it into a separate list to be compared, then read the third element b and compare it with a. b needs to be at least d apart from a, if so it would be put into the subset with a. Then b would equal a and you would move on down till the end and make those a set, then you would start over and do it again until there are no more elements. I am trying to do this by using array lists, all I have so far is reading the file and putting it into an array list then sorting it. I need some help with pulling the first element out and then making the comparisons. <pre><code>import java.io.File; import java.io.FileNotFoundException; import java.util.ArrayList; import java.util.Scanner; import java.util.Collections; public class FloatFromFile { public static void main(String[] args) { Scanner file = null; ArrayList<Float> list = new ArrayList<Float>(); try { file = new Scanner(new File("test.txt")); } catch (FileNotFoundException e) { e.printStackTrace(); } while(file.hasNext()) { if (file.hasNextFloat()) list.add(file.nextFloat()); else file.next(); } // display unsorted list System.err.print("Origional List is:\n"); for (Float i: list) System.out.println(i); Collections.sort(list); // display sorted list System.err.print("Sorted List is:\n"); for (Float i: list) System.out.println(i); ArrayList<Float> sorted = new ArrayList<Float>(); while (file.hasNext()) { Float val = file.nextFloat(); int i = sorted.size(); float temp = sorted.get(i-1); while (i > 0 && temp > val) { i--; temp = sorted.get(i-1); } sorted.insert(i, val); } for (Float i: sorted) System.out.println(i); } } </code></pre> I added in the new method, but I am still having problems getting it to work I am getting the errors FloatFromFile.java:50: error: cannot find symbol sorted.insert(i,val); ^ symbol: method insert(int,Float) location: variable sorted of type ArrayList 1 error 
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Reading from file and sort into subsets
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