Java中String[]类型与ArrayList类型之间转换

List转为String[]

List list = new ArrayList();
String[] stringArray = new String[2]; 
list.toArray(stringArray);    
//String str[] = list.toArray(new String[]{}); 

String[]转为List

String[] stringArray = new String[2]; 
List list = java.util.Arrays.asList(stringArray);

remove() on List created by Arrays.asList() throws UnsupportedOperationException

直接使用Arrays.asList(la)转成List<> 使用remove时会报错，所以可以有一下用法：
List<String> c = new ArrayList<>(Arrays.asList(la));

list.toArray(new String[]{}); Arrays.asList(stringArray)