g0001_0100.s0049_group_anagrams.Solution Maven / Gradle / Ivy

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Java-based LeetCode algorithm problem solutions, regularly updated

There is a newer version: 1.37

package g0001_0100.s0049_group_anagrams;

// #Medium #Top_100_Liked_Questions #Top_Interview_Questions #String #Hash_Table #Sorting
// #2022_02_18_Time_10_ms_(74.79%)_Space_56.1_MB_(20.82%)

import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class Solution {
    public List> groupAnagrams(String[] strs) {
        Map> hm = new HashMap<>();

        for (String s : strs) {
            char[] ch = s.toCharArray();

            Arrays.sort(ch);
            String temp = new String(ch);

            hm.computeIfAbsent(temp, k -> new ArrayList<>());
            hm.get(temp).add(s);
        }

        return (new ArrayList<>(hm.values()));
    }
}