Group Anagrams in Java: Explanation & Practice

Problem summary

Given a list of words, group them by anagrams.

Starter code

import java.util.*;

public class Main {
    public static void main(String[] args) {
        String[] words = {"eat", "tea", "tan", "ate", "nat", "bat"};
        
        // Group anagrams together
        // Print each group on a line
    }
}

Expected output and test cases

• Grouped anagrams

  [eat, tea, ate]
  [tan, nat]
  [bat]

• All anagrams

  [abc, bca, cab]

• No anagrams

  [a]
  [b]
  [c]

Hints

1. Sort each word's characters as key
2. Use Map<String, List<String>>
3. Same sorted chars = anagrams

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