Day 10 :: 2390. Removing Stars From a String

src/main/java/com/vitalish/leetcode/stack/RemovingStarsFromString.java

@@ -0,0 +1,30 @@
+package com.vitalish.leetcode.stack;
+
+import java.util.Stack;
+import java.util.stream.Collectors;
+
+/**
+ * 2390. Removing Stars From a String
+ *
+ * @see https://leetcode.com/problems/removing-stars-from-a-string/description/
+ */
+public class RemovingStarsFromString {
+
+    public String removeStars(String s) {
+        Stack<Character> stack = new Stack<>();
+
+        for (int i = 0; i < s.length(); i++) {
+            var current = s.charAt(i);
+            if (current == '*') {
+                stack.pop();
+            } else {
+                stack.push(current);
+            }
+        }
+
+        return stack.stream()
+                .map(String::valueOf)
+                .collect(Collectors.joining());
+    }
+
+}

src/test/java/com/vitalish/leetcode/stack/RemovingStarsFromStringTest.java

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+package com.vitalish.leetcode.stack;
+
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
+
+import java.util.stream.Stream;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+class RemovingStarsFromStringTest {
+
+    RemovingStarsFromString removingStarsFromString = new RemovingStarsFromString();
+
+    @ParameterizedTest
+    @MethodSource("arguments")
+    void removesStarsFromString(String input, String expected) {
+        assertEquals(expected, removingStarsFromString.removeStars(input));
+    }
+
+    private static Stream<Arguments> arguments() {
+        return Stream.of(
+                Arguments.of("leet**cod*e", "lecoe"),
+                Arguments.of("erase*****", "")
+        );
+    }
+}