Resolved SonarQube warnings

Author: javadev

src/main/java/g0001_0100/s0071_simplify_path/Solution.java

@@ -33,6 +33,6 @@ public String simplifyPath(String path) {
             ans.insert(0, stk.pop());
             ans.insert(0, "/");
         }
-        return ans.length() > 0 ? ans.toString() : "/";
+        return !ans.isEmpty() ? ans.toString() : "/";
     }
 }

src/main/java/g0101_0200/s0151_reverse_words_in_a_string/Solution.java

@@ -17,7 +17,7 @@ public String reverseWords(String s) {
             sb.append(s, start + 1, i + 1);
             i = start - 1;
         }
-        if (sb.length() > 0) {
+        if (!sb.isEmpty()) {
             sb.deleteCharAt(0);
         }
         return sb.toString();

src/main/java/g0701_0800/s0722_remove_comments/Solution.java

@@ -44,7 +44,7 @@ public List<String> removeComments(String[] source) {
                 }
                 index++;
             }
-            if (sb.length() > 0 && !multiComment) {
+            if (!sb.isEmpty() && !multiComment) {
                 result.add(sb.toString());
                 sb.setLength(0);
             }

src/main/java/g1201_1300/s1209_remove_all_adjacent_duplicates_in_string_ii/Solution.java

@@ -7,7 +7,7 @@ public String removeDuplicates(String s, int k) {
         StringBuilder sb = new StringBuilder();
         int dupCount = 0;
         for (int i = 0; i < s.length(); i++) {
-            if (sb.length() != 0 && sb.charAt(sb.length() - 1) == s.charAt(i)) {
+            if (!sb.isEmpty() && sb.charAt(sb.length() - 1) == s.charAt(i)) {
                 dupCount++;
             } else {
                 dupCount = 1;

src/main/java/g2001_2100/s2030_smallest_k_length_subsequence_with_occurrences_of_a_letter/Solution.java

@@ -12,7 +12,7 @@ public String smallestSubsequence(String s, int k, char letter, int repetition)
         StringBuilder sb = new StringBuilder();
         for (int i = 0; i < s.length(); count -= s.charAt(i++) == letter ? 1 : 0) {
             while (sb.length() + s.length() > i + k
-                    && sb.length() > 0
+                    && !sb.isEmpty()
                     && s.charAt(i) < sb.charAt(sb.length() - 1)
                     && (sb.charAt(sb.length() - 1) != letter || count != repetition)) {
                 repetition += sb.charAt(sb.length() - 1) == letter ? 1 : 0;