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  1. import java.util.*;
  2. class Test {
  3.   public static void main(String[] args) {
  4.     TreeMap<String, List<String>> lengthMap = new TreeMap<>(Comparator.comparingInt(String::length));
  5.  
  6.     List<String> strings = new ArrayList<>(Arrays.asList("The quick brown fox jumps over the lazy dog".split(" ")));
  7.     for (String s : strings) {
  8.       lengthMap.computeIfAbsent(s, k -> new ArrayList<>()).add(s);
  9.     }
  10.  
  11.     Set<String> toRemove = lengthMap.keySet();
  12.  
  13. 	System.out.println("List before: " + strings);
  14.     System.out.println("Set to remove: " + toRemove);
  15.  
  16.     strings.removeAll(toRemove);
  17.     System.out.println("List after:" + strings);
  18.   }
  19. }
  20.  
Success #stdin #stdout 0.13s 2184192KB
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stdin
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Standard input is empty
stdout
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List before: [The, quick, brown, fox, jumps, over, the, lazy, dog]
Set to remove: [The, over, quick]
List after:[]
https://ideone.com/vGajZ6
language:
Java (HotSpot 12)
created:
5 years ago
visibility:
public

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