String[] a = {"A","B","C"};
String[] b = {"D","E"};
//执行OK
List<String> list = new ArrayList<String>(Arrays.asList(a));
list.addAll(Arrays.asList(b));//ok
//执行异常
//List<String> list = Arrays.asList(a);
//list.addAll(Arrays.asList(b));//java.lang.UnsupportedOperationException
String[] str = new String[list.size()];
list.toArray(str);
for(int x=0;x<str.length;x++){
System.out.print(str[x] + " ");
}
具体原因,可以参考如下博客:
https://www.cnblogs.com/wang-meng/p/f1532cf23ce049ce63b4bdd62d53659d.html