add 1657

Author: fishercoder1534

README.md

@@ -8,6 +8,7 @@ _If you like this project, please leave me a star._ ★
 
 |  #  |      Title     |   Solutions   | Video  | Difficulty  | Tag                   
 |-----|----------------|---------------|--------|-------------|-------------
+|1657|[Determine if Two Strings Are Close](https://leetcode.com/problems/determine-if-two-strings-are-close/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1657.java) ||Medium|Greedy|
 |1656|[Design an Ordered Stream](https://leetcode.com/problems/design-an-ordered-stream/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1656.java) ||Easy|Array, Design|
 |1652|[Defuse the Bomb](https://leetcode.com/problems/defuse-the-bomb/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1652.java) ||Easy|Array|
 |1640|[Check Array Formation Through Concatenation](https://leetcode.com/problems/check-array-formation-through-concatenation/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1640.java) ||Easy|Array, Sort|

src/main/java/com/fishercoder/solutions/_1657.java

@@ -0,0 +1,28 @@
+package com.fishercoder.solutions;
+
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.Set;
+
+public class _1657 {
+    public static class Solution1 {
+        public boolean closeStrings(String word1, String word2) {
+            int[] counts1 = new int[26];
+            int[] counts2 = new int[26];
+            Set<Character> set1 = new HashSet<>();
+            Set<Character> set2 = new HashSet<>();
+            for (char c : word1.toCharArray()) {
+                counts1[c - 'a']++;
+                set1.add(c);
+            }
+            Arrays.sort(counts1);
+            for (char c : word2.toCharArray()) {
+                counts2[c - 'a']++;
+                set2.add(c);
+            }
+            Arrays.sort(counts2);
+            return set1.equals(set2) && Arrays.equals(counts1, counts2);
+        }
+
+    }
+}

src/test/java/com/fishercoder/_1657Test.java

@@ -0,0 +1,41 @@
+package com.fishercoder;
+
+import com.fishercoder.solutions._1657;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+
+public class _1657Test {
+    private static _1657.Solution1 solution1;
+
+    @BeforeClass
+    public static void setup() {
+        solution1 = new _1657.Solution1();
+    }
+
+    @Test
+    public void test1() {
+        assertEquals(true, solution1.closeStrings("abc", "bca"));
+    }
+
+    @Test
+    public void test2() {
+        assertEquals(false, solution1.closeStrings("a", "aa"));
+    }
+
+    @Test
+    public void test3() {
+        assertEquals(true, solution1.closeStrings("cabbba", "abbccc"));
+    }
+
+    @Test
+    public void test4() {
+        assertEquals(false, solution1.closeStrings("cabbba", "aabbss"));
+    }
+
+    @Test
+    public void test5() {
+        assertEquals(false, solution1.closeStrings("abbbzcf", "babzzcz"));
+    }
+}