add solution of valid-anagram

Author: JEONGBEOMKO

valid-anagram/JEONGBEOMKO.java

@@ -0,0 +1,29 @@
+import java.util.HashMap;
+import java.util.Map;
+
+public class Solution {
+
+    public boolean isAnagram(String s, String t) {
+
+        Map<Character, Integer> charMap = new HashMap<>();
+
+        char[] sArr = s.toCharArray();
+        for (char sa : sArr) {
+            charMap.put(sa, charMap.getOrDefault(sa, 0) + 1);
+        }
+
+        char[] tArr = t.toCharArray();
+        for (char ta : tArr) {
+            charMap.put(ta, charMap.getOrDefault(ta, 0) - 1);
+        }
+
+        for (int cnt : charMap.values()) {
+            if (cnt != 0) {
+                return false;
+            }
+        }
+
+        return true;
+
+    }
+}