lknny
diff --git a/‎README.md
Copy file name to clipboardExpand all lines: README.md
+1Lines changed: 1 addition & 0 deletions b/‎README.md
Copy file name to clipboardExpand all lines: README.md
+1Lines changed: 1 addition & 0 deletions
diff --git a/‎contents/initialization-of-an-arraylist-in-one-line.md
Copy file name to clipboard
+56Lines changed: 56 additions & 0 deletions b/‎contents/initialization-of-an-arraylist-in-one-line.md
Copy file name to clipboard
+56Lines changed: 56 additions & 0 deletions
@@ -34,6 +34,7 @@ stackoverflow-Java-top-qa
 
 * [去掉烦人的“!=null"(判空语句](https://github.com/giantray/stackoverflow-java-top-qa/blob/master/contents/avoiding-null-statements-in-java.md)
 * [获取完整的堆栈信息](https://github.com/giantray/stackoverflow-java-top-qa/blob/master/contents/get-current-stack-trace-in-java.md)
+* [如何通过一行代码初始化ArrayList](https://github.com/giantray/stackoverflow-java-top-qa/blob/master/contents/initialization-of-an-arraylist-in-one-line.md)
 
 > 网络
 
 
@@ -0,0 +1,56 @@
+##如何通过一行代码初始化ArrayList
+
+###问题
+为了测试，我需要临时快速创建一个list。一开始我这样做：
+```java
+ArrayList<String> places = new ArrayList<String>();
+places.add("Buenos Aires");
+places.add("Córdoba");
+places.add("La Plata");
+```
+之后我重构了下
+```java
+ArrayList<String> places = new ArrayList<String>(
+    Arrays.asList("Buenos Aires", "Córdoba", "La Plata"));
+```
+是否有更加简便的方法呢？
+
+###回答
+
+####常见方式
+实际上，也许“最好”的方式，就是你写的这个方式，因为它不用再创建新的`List`:
+```
+ArrayList<String> list = new ArrayList<String>();
+list.add("A");
+list.add("B");
+list.add("C");
+```
+只是这个方式看上去要多写些代码，让人郁闷
+
+####匿名内部类
+当然，还有其他方式，例如,写一个匿名内部类，然后在其中做初始化（也被称为 brace initialization）：
+```
+ArrayList<String> list = new ArrayList<String>() {{
+    add("A");
+    add("B");
+    add("C");
+}};
+```
+但是，我不喜欢这个方式。只是为了做个初始化，却要在`ArrayList`的同一行后面加这么一坨代码。
+
+####Arrays.asList
+```
+List<String> places = Arrays.asList("Buenos Aires", "Córdoba", "La Plata");
+```
+####Collections.singletonList
+```
+List<String> places = Collections.singletonList("Buenos Aires");
+```
+注意：后面的这两种方式，得到的是一个定长的`List`(如果add操作会抛异常）。如果你需要一个不定长的`List`,可以这样做：
+```
+ArrayList<String> places = new ArrayList<>(Arrays.asList("Buenos Aires", "Córdoba", "La Plata"));
+
+```
+
+stackoverflow链接：
+http://stackoverflow.com/questions/1005073/initialization-of-an-arraylist-in-one-line