solvesreplace all digitswith characters

Author: anishLearnsToCode

README.md

@@ -447,7 +447,7 @@
 | 1827 | [Minimum Operations to Make the Array Increasing](https://leetcode.com/problems/minimum-operations-to-make-the-array-increasing)                          |                                                    [![Java](assets/java.png)](src/MinimumOperationsToMakeTheArrayIncreasing.java)                                                    |                                                                                                                                   |
 | 1832 | [Check if the Sentence Is Pangram](https://leetcode.com/problems/check-if-the-sentence-is-pangram)                                                        |                                                            [![Java](assets/java.png)](src/CheckIfSentenceIsPangram.java)                                                             |                                                                                                                                   |
 | 1837 | [Sum of Digits in Base K](https://leetcode.com/problems/sum-of-digits-in-base-k)                                                                          |                                                               [![Java](assets/java.png)](src/SumOfDigitsInBaseK.java)                                                                |                                                                                                                                   |
-| 1844 | [Replace All Digits with Characters](https://leetcode.com/problems/replace-all-digits-with-characters)                                                    |                                                                                                                                                                                      |                                                                                                                                   |
+| 1844 | [Replace All Digits with Characters](https://leetcode.com/problems/replace-all-digits-with-characters)                                                    |                                                         [![Java](assets/java.png)](src/ReplaceAllDigitsWithCharacters.java)                                                          |                                                                                                                                   |
 | 1848 | [Minimum Distance to the Target Element](https://leetcode.com/problems/minimum-distance-to-the-target-element)                                            |                                                                                                                                                                                      |                                                                                                                                   |
 | 1854 | [Maximum Population Year](https://leetcode.com/problems/maximum-population-year)                                                                          |                                                                                                                                                                                      |                                                                                                                                   |
 | 1859 | [Sorting the Sentence](https://leetcode.com/problems/sorting-the-sentence)                                                                                |                                                                                                                                                                                      |                                                                                                                                   |

src/ReplaceAllDigitsWithCharacters.java

@@ -0,0 +1,16 @@
+public class ReplaceAllDigitsWithCharacters {
+    public String replaceDigits(String s) {
+        final StringBuilder result = new StringBuilder();
+        for (int i = 1 ; i < s.length() ; i += 2) {
+            result.append(s.charAt(i - 1)).append(shift(s.charAt(i - 1), s.charAt(i) - '0'));
+        }
+        if (s.length() % 2 == 1) {
+            result.append(s.charAt(s.length() - 1));
+        }
+        return result.toString();
+    }
+
+    private char shift(char c, int shiftAmount) {
+        return (char) (c + shiftAmount);
+    }
+}