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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10.     public static void main(String[] args) throws FileNotFoundException {
  11.         File cityPopulation = new File("cityPopulationData.txt");
  12.         Scanner fileReader = new Scanner(cityPopulation);
  13.         fileReader.useDelimiter("[\t|\n]+");
  14.         String[] cities = new String[400];
  15.         int[] pop2010 = new int[400];
  16.         int[] pop2013 = new int[400];
  17.         double[] area = new double[400];
  18.         int count = getData(fileReader, cities, pop2010, pop2013, area);
  19.         displayArrays(cities, pop2010, pop2013, area, count);
  20.         largestCity(pop2010, count);
  21.     }
  22.  
  23.     public static int getData(Scanner inf, String[] c, int[] pop10, int[] pop13, double[] a) {
  24.         int count = 0;
  25.         inf.next();
  26.         inf.next();
  27.         inf.next();
  28.         inf.next();
  29.         while(inf.hasNext()) {
  30.             c[count] = inf.next();
  31.             pop10[count] = inf.nextInt();
  32.             pop13[count] = inf.nextInt();
  33.             a[count] = inf.nextDouble();
  34.             count++;
  35.         }
  36.         return count;
  37.     }
  38.  
  39.     public static void displayArrays(String[] c, int[] pop10, int[] pop13, double[] a, int count) {
  40.         for(int i = 0; i < count; i++){
  41.             System.out.printf("%s \t %d \t %d \t %f", c[i], pop10[i], pop13[i], a[i]);
  42.         }
  43.     }
  44.  
  45.     public static int largestCity(int[] pop10, int count) {
  46.         int lCindex = 0;
  47.         for(int i = 1; i < count; i++) {
  48.             if(pop10[i] > pop10[lCindex])
  49.                 lCindex = i;
  50.         }
  51.         return lCindex;
  52.     }
  53.  
  54.     // public static int findGrowth(int[] pop10, int[] pop13, int count,  ) {
  55.     // 
  56.     // }
  57.  
  58.     public static int highestDensity(int[] pop10, double[] area, int count) {
  59.         int hDindex = 0;
  60.         for( int i = 1; i < count; i++) {
  61.             if ((pop10[i]/area[i]) > (pop10[hDindex]/area[hDindex]))
  62.                 hDindex = i;
  63.         }
  64.         return hDindex;
  65.     }
  66.  
  67. }
Runtime error #stdin #stdout #stderr 0.07s 380160KB
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stdin
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Standard input is empty
stdout
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Standard output is empty
stderr
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Exception in thread "main" java.io.FileNotFoundException: cityPopulationData.txt (No such file or directory)
	at java.io.FileInputStream.open(Native Method)
	at java.io.FileInputStream.<init>(FileInputStream.java:138)
	at java.util.Scanner.<init>(Scanner.java:656)
	at Ideone.main(Main.java:12)
https://ideone.com/IarN81
language:
Java (HotSpot 12)
created:
9 years ago
visibility:
public

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