solves #2788: Split Strings by Separator in java

Author: anishLearnsToCode

README.txt

@@ -840,7 +840,7 @@
 | 2769 | [Find the Maximum Achievable Number](https://leetcode.com/problems/find-the-maximum-achievable-number)                                                                 |                                                                                   [![Java](assets/java.png)](src/FindTheMaximumAchievableNumber.java)                                                                                                                                               |                                                                                                                                   |
 | 2778 | [Sum of Squares of Special Elements](https://leetcode.com/problems/sum-of-squares-of-special-elements)                                                                 |                                                                                   [![Java](assets/java.png)](src/SumOfSquaresOfSpecialElements.java)                                                                                                                                               |                                                                                                                                   |
 | 2784 | [Check if Array is Good](https://leetcode.com/problems/check-if-array-is-good)                                                                                         |                                                                                   [![Java](assets/java.png)](src/CheckIfArrayIsGood.java)                                                                                                                                               |                                                                                                                                   |
-| 2788 | [Split Strings by Separator](https://leetcode.com/problems/split-strings-by-separator)                                                                                 |                                                                                                                                                                                                                                  |                                                                                                                                   |
+| 2788 | [Split Strings by Separator](https://leetcode.com/problems/split-strings-by-separator)                                                                                 |                                                                                   [![Java](assets/java.png)](src/SplitStringsBySeparator.java)                                                                                                                                               |                                                                                                                                   |
 | 2798 | [Number of Employees Who Met the Target](https://leetcode.com/problems/number-of-employees-who-met-the-target)                                                         |                                                                                                                                                                                                                                  |                                                                                                                                   |
 | 2806 | [Account Balance After Rounded Purchase](https://leetcode.com/problems/account-balance-after-rounded-purchase)                                                         |                                                                                                                                                                                                                                  |                                                                                                                                   |
 | 2810 | [Faulty Keyboard](https://leetcode.com/problems/faulty-keyboard)                                                                                                       |                                                                                                                                                                                                                                  |                                                                                                                                   |

src/HelloWorld.java

@@ -1,13 +1,13 @@
-import java.util.PriorityQueue;
-import java.util.Queue;
+import java.util.*;
 
 public class HelloWorld {
     public static void main(String[] args) {
-        final Queue<Integer> queue = new PriorityQueue<>();
-        queue.add(10);
-        queue.add(4);
-        queue.add(-2);
+        final List<String> words = new ArrayList<>();
+        words.add("apple.ball.cat");
+        words.add("apple.ball.cat.dog");
 
-        System.out.println(queue.peek());
+        final String word = "apple.ball.cat.dog";
+
+        System.out.println(Arrays.toString(word.split("/.")));
     }
 }

src/SplitStringsBySeparator.java

@@ -0,0 +1,40 @@
+// https://leetcode.com/problems/split-strings-by-separator
+// W: number of words
+// s: string in words
+// T: O(W * |s|)
+// S: O(W * |s|)
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class SplitStringsBySeparator {
+    public List<String> splitWordsBySeparator(List<String> words, char separator) {
+        final List<String> result = new ArrayList<>();
+        for (String word : words) {
+            final List<String> splitStrings = split(word, separator);
+            for (String split : splitStrings) {
+                if (!split.isEmpty()) {
+                    result.add(split);
+                }
+            }
+        }
+        return result;
+    }
+
+    private List<String> split(String string, char separator) {
+        final List<String> result = new ArrayList<>();
+        StringBuilder builder = new StringBuilder();
+        for (int i = 0 ; i < string.length() ; i++) {
+            if (string.charAt(i) == separator) {
+                result.add(builder.toString());
+                builder = new StringBuilder();
+            } else {
+                builder.append(string.charAt(i));
+            }
+        }
+        if (!builder.isEmpty()) {
+            result.add(builder.toString());
+        }
+        return result;
+    }
+}