update 125

Author: fishercoder1534

src/main/java/com/fishercoder/solutions/_125.java

@@ -3,21 +3,21 @@
 public class _125 {
     public static class Solution1 {
         public boolean isPalindrome(String s) {
-            int i = 0;
-            int j = s.length() - 1;
+            int left = 0;
+            int right = s.length() - 1;
             char[] chars = s.toCharArray();
-            while (i < j) {
-                while (i < j && !Character.isLetterOrDigit(chars[i])) {
-                    i++;
+            while (left < right) {
+                while (left < right && !Character.isLetterOrDigit(chars[left])) {
+                    left++;
                 }
-                while (i < j && !Character.isLetterOrDigit(chars[j])) {
-                    j--;
+                while (left < right && !Character.isLetterOrDigit(chars[right])) {
+                    right--;
                 }
-                if (Character.toLowerCase(chars[i]) != Character.toLowerCase(chars[j])) {
+                if (Character.toLowerCase(chars[left]) != Character.toLowerCase(chars[right])) {
                     return false;
                 }
-                i++;
-                j--;
+                left++;
+                right--;
             }
             return true;
         }

src/test/java/com/fishercoder/_125Test.java

@@ -0,0 +1,41 @@
+package com.fishercoder;
+
+import com.fishercoder.solutions._125;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+
+public class _125Test {
+    private static _125.Solution1 solution1;
+    private static String s;
+
+    @BeforeClass
+    public static void setup() {
+        solution1 = new _125.Solution1();
+    }
+
+    @Test
+    public void test1() {
+        s = "A man, a plan, a canal: Panama";
+        assertEquals(true, solution1.isPalindrome(s));
+    }
+
+    @Test
+    public void test2() {
+        s = "race a car";
+        assertEquals(false, solution1.isPalindrome(s));
+    }
+
+    @Test
+    public void test3() {
+        s = " ";
+        assertEquals(true, solution1.isPalindrome(s));
+    }
+
+    @Test
+    public void test4() {
+        s = "0P";
+        assertEquals(false, solution1.isPalindrome(s));
+    }
+}