GFigting
diff --git a/‎note/001/README.md
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+1-1Lines changed: 1 addition & 1 deletion b/‎note/001/README.md
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+1-1Lines changed: 1 addition & 1 deletion
diff --git a/‎src/com/blankj/easy/_001/Solution.java
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+3-2Lines changed: 3 additions & 2 deletions b/‎src/com/blankj/easy/_001/Solution.java
Copy file name to clipboardExpand all lines: src/com/blankj/easy/_001/Solution.java
+3-2Lines changed: 3 additions & 2 deletions
@@ -44,7 +44,7 @@ class Solution {
 ```java
 class Solution {
     public int[] twoSum(int[] nums, int target) {
-        final int len = nums.length;
+        int len = nums.length;
         HashMap<Integer, Integer> map = new HashMap<>();
         for (int i = 0; i < len; ++i) {
             final Integer value = map.get(nums[i]);
 
@@ -27,8 +27,9 @@ public int[] twoSum(int[] nums, int target) {
         int len = nums.length;
         HashMap<Integer, Integer> map = new HashMap<>();
         for (int i = 0; i < len; ++i) {
-            if (map.containsKey(nums[i])) {
-                return new int[]{map.get(nums[i]), i};
+            final Integer value = map.get(nums[i]);
+            if (value != null) {
+                return new int[] { value, i };
             }
             map.put(target - nums[i], i);
         }
Original file line number	Diff line number	Diff line change
`@@ -27,8 +27,9 @@ public int[] twoSum(int[] nums, int target) {`
`27`	`27`	`int len = nums.length;`
`28`	`28`	`HashMap<Integer, Integer> map = new HashMap<>();`
`29`	`29`	`for (int i = 0; i < len; ++i) {`
`30`		`- if (map.containsKey(nums[i])) {`
`31`		`- return new int[]{map.get(nums[i]), i};`
	`30`	`+ final Integer value = map.get(nums[i]);`
	`31`	`+ if (value != null) {`
	`32`	`+ return new int[] { value, i };`
`32`	`33`	`}`
`33`	`34`	`map.put(target - nums[i], i);`
`34`	`35`	`}`