2022-06-18 update: added "Strong Password Checker II"

Author: fartem

src/main/java/com/smlnskgmail/jaman/leetcodejava/easy/StrongPasswordCheckerII.java

@@ -0,0 +1,43 @@
+package com.smlnskgmail.jaman.leetcodejava.easy;
+
+import java.util.HashSet;
+import java.util.Set;
+
+// https://leetcode.com/problems/strong-password-checker-ii/
+public class StrongPasswordCheckerII {
+
+    private final String input;
+
+    public StrongPasswordCheckerII(String input) {
+        this.input = input;
+    }
+
+    public boolean solution() {
+        if (input.length() < 8) {
+            return false;
+        }
+        Set<Character> special = new HashSet<>();
+        String specialChars = "!@#$%^&*()-+";
+        for (int i = 0; i < specialChars.length(); i++) {
+            special.add(specialChars.charAt(i));
+        }
+        char prev = input.charAt(0);
+        int digits = Character.isDigit(prev) ? 1 : 0;
+        int upper = Character.isUpperCase(prev) ? 1 : 0;
+        int lower = Character.isLowerCase(prev) ? 1 : 0;
+        int spec = special.contains(prev) ? 1 : 0;
+        for (int i = 1; i < input.length(); i++) {
+            char curr = input.charAt(i);
+            if (curr == prev) {
+                return false;
+            }
+            digits += Character.isDigit(curr) ? 1 : 0;
+            upper += Character.isUpperCase(curr) ? 1 : 0;
+            lower += Character.isLowerCase(curr) ? 1 : 0;
+            spec += special.contains(curr) ? 1 : 0;
+            prev = curr;
+        }
+        return digits > 0 && upper > 0 && lower > 0 && spec > 0;
+    }
+
+}

src/test/java/com/smlnskgmail/jaman/leetcodejava/easy/StrongPasswordCheckerIITest.java

@@ -0,0 +1,14 @@
+package com.smlnskgmail.jaman.leetcodejava.easy;
+
+import org.junit.Test;
+
+import static org.junit.Assert.assertTrue;
+
+public class StrongPasswordCheckerIITest {
+
+    @Test
+    public void defaultTest() {
+        assertTrue(new StrongPasswordCheckerII("IloveLe3tcode!").solution());
+    }
+
+}