refactor 294

fishercoder1534 · fishercoder1534 · commit be573fea02f5 · 2018-12-03T07:29:49.000-08:00
diff --git a/src/main/java/com/fishercoder/solutions/_294.java b/src/main/java/com/fishercoder/solutions/_294.java
@@ -18,28 +18,30 @@
  */
 public class _294 {
 
-    public boolean canWin(String s) {
-        List<String> res = new ArrayList<String>();
-        char[] charArray = s.toCharArray();
-        for (int i = 0; i < s.length() - 1; i++) {
-            if (charArray[i] == '+' && charArray[i + 1] == '+') {
-                //change these two bits to '-'
-                charArray[i] = '-';
-                charArray[i + 1] = '-';
-                res.add(String.valueOf(charArray));
-                //change these two bits back to '+' for its next move
-                charArray[i] = '+';
-                charArray[i + 1] = '+';
+    public static class Solution1 {
+        public boolean canWin(String s) {
+            List<String> res = new ArrayList<>();
+            char[] charArray = s.toCharArray();
+            for (int i = 0; i < s.length() - 1; i++) {
+                if (charArray[i] == '+' && charArray[i + 1] == '+') {
+                    //change these two bits to '-'
+                    charArray[i] = '-';
+                    charArray[i + 1] = '-';
+                    res.add(String.valueOf(charArray));
+                    //change these two bits back to '+' for its next move
+                    charArray[i] = '+';
+                    charArray[i + 1] = '+';
+                }
             }
-        }
-        /**The above part is the same of Flip Game I.
-         * The only added part is the following piece of logic (so-called backtracking.)*/
-        for (String str : res) {
-            if (!canWin(str)) {
-                return true;
+            /**The above part is the same of Flip Game I.
+             * The only added part is the following piece of logic (so-called backtracking.)*/
+            for (String str : res) {
+                if (!canWin(str)) {
+                    return true;
+                }
             }
+            return false;
         }
-        return false;
     }
 
 }
diff --git a/src/test/java/com/fishercoder/_294Test.java b/src/test/java/com/fishercoder/_294Test.java
@@ -10,15 +10,15 @@
  * Created by stevesun on 5/29/17.
  */
 public class _294Test {
-    private static _294 test;
+  private static _294.Solution1 solution1;
 
-    @BeforeClass
-    public static void setup() {
-        test = new _294();
-    }
+  @BeforeClass
+  public static void setup() {
+    solution1 = new _294.Solution1();
+  }
 
-    @Test
-    public void test1() {
-        assertEquals(true, test.canWin("++++"));
-    }
+  @Test
+  public void test1() {
+    assertEquals(true, solution1.canWin("++++"));
+  }
 }
