1、Arrays.asList

ArrayList<Type> obj = new ArrayList<Type>
(Arrays.asList(Object o1, Object o2, Object o3, ....so on));

2、生成匿名内部内进行初始化

ArrayList<T> obj = new ArrayList<T>() {{
    add(Object o1);
    add(Object o2);
    ...
    ...
}};

3、常规方式

ArrayList<T> obj = new ArrayList<T>();
obj.add("o1");
obj.add("o2");
...
...

或者

ArrayList<T> obj = new ArrayList<T>();
List list = Arrays.asList("o1","o2",...);
obj.addAll(list);

4、Collections.ncopies

ArrayList<T> obj = new ArrayList<T>(Collections.nCopies(count,element));
//把element复制count次填入ArrayList中

https://blog.csdn.net/u011523796/article/details/79537055