add 1790

Author: fishercoder1534

README.md

@@ -9,6 +9,7 @@ _If you like this project, please leave me a star._ ★
 |  #  |      Title     |   Solutions   | Video  | Difficulty  | Tag                   
 |-----|----------------|---------------|--------|-------------|-------------
 |1791|[Find Center of Star Graph](https://leetcode.com/problems/find-center-of-star-graph/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1791.java) ||Medium|Graph|
+|1790|[Check if One String Swap Can Make Strings Equal](https://leetcode.com/problems/check-if-one-string-swap-can-make-strings-equal/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1790.java) ||Easy|String|
 |1785|[Minimum Elements to Add to Form a Given Sum](https://leetcode.com/problems/minimum-elements-to-add-to-form-a-given-sum/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1785.java) ||Medium|Greedy|
 |1784|[Check if Binary String Has at Most One Segment of Ones](https://leetcode.com/problems/check-if-binary-string-has-at-most-one-segment-of-ones/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1784.java) ||Easy|Greedy|
 |1781|[Sum of Beauty of All Substrings](https://leetcode.com/problems/sum-of-beauty-of-all-substrings/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1781.java) ||Medium|HashTable, String|

src/main/java/com/fishercoder/solutions/_1790.java

@@ -0,0 +1,28 @@
+package com.fishercoder.solutions;
+
+public class _1790 {
+    public static class Solution1 {
+        public boolean areAlmostEqual(String s1, String s2) {
+            if (s1.equals(s2)) {
+                return true;
+            }
+            for (int i = 0; i < s1.length(); i++) {
+                for (int j = 0; j < i; j++) {
+                    String newS1 = swap(s1, i, j);
+                    if (newS1.equals(s2)) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+
+        private String swap(String str, int i, int j) {
+            char c = str.charAt(i);
+            StringBuilder sb = new StringBuilder(str);
+            sb.replace(i, i + 1, str.charAt(j) + "");
+            sb.replace(j, j + 1, "" + c);
+            return sb.toString();
+        }
+    }
+}

src/test/java/com/fishercoder/_1790Test.java

@@ -0,0 +1,27 @@
+package com.fishercoder;
+
+import com.fishercoder.solutions._1790;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+
+public class _1790Test {
+    private static _1790.Solution1 solution1;
+
+    @BeforeClass
+    public static void setup() {
+        solution1 = new _1790.Solution1();
+    }
+
+    @Test
+    public void test1() {
+        assertEquals(false, solution1.areAlmostEqual("a", "z"));
+    }
+
+    @Test
+    public void test2() {
+        assertEquals(true, solution1.areAlmostEqual("bank", "kanb"));
+    }
+
+}