java - is string anagram ?

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import java.util.Arrays; public class _String { static boolean is_anagram(String s1, String s2){ if(s1.length() != s2.length() || s1.equals(s2)) return false; char[] c1 = s1.toLowerCase().toCharArray(); char[] c2 = s2.toLowerCase().toCharArray(); Arrays.sort(c1); Arrays.sort(c2); return Arrays.equals(c1, c2); } }