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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. class Ideone {
  8.  
  9.     public static void main(String[] args) throws Exception {
  10.  
  11.         HashMap<String ,Double> map = new HashMap<String ,Double>();
  12.         ValueComparator bvc =  new ValueComparator(map);
  13.         TreeMap<String, Double> sortedMap = new TreeMap<String ,Double>(bvc);
  14.  
  15.         map.put("A",99.5);
  16.         map.put("B",67.4);
  17.         map.put("C",67.4);
  18.         map.put("D",67.3);
  19.  
  20.         System.out.println("unsorted map: "+map);
  21.  
  22.         sortedMap.putAll(map);
  23.  
  24.         System.out.println("sorted map: "+ sortedMap);
  25.  
  26.         System.out.println("Highest value: " + sortedMap.firstEntry().getValue().toString());
  27.  
  28.         System.out.println("Lowest value: "+ sortedMap.lastEntry().getValue().toString());
  29.     }
  30.  
  31. }
  32.  
  33. class ValueComparator implements Comparator<String> {
  34.  
  35.         private Map<String, Double> base;
  36.  
  37.         public ValueComparator(Map<String, Double> base) {
  38.             this.base = base;
  39.         }
  40.  
  41.         public int compare(String a, String b) {
  42.             if (base.get(a) >= base.get(b)) {
  43.                 return -1;
  44.             } else {
  45.                 return 1;
  46.             }
  47.         }
  48.     }
  49.  
Success #stdin #stdout 0.07s 380224KB
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Standard input is empty
stdout
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unsorted map: {D=67.3, A=99.5, B=67.4, C=67.4}
sorted map: {A=99.5, C=67.4, B=67.4, D=67.3}
Highest value: 99.5
Lowest value: 67.3
https://ideone.com/D9Vogm
language:
Java (HotSpot 12)
created:
9 years ago
visibility:
secret

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