List list = 。
ArrayList arrayList ;
if (list instanceof ArrayList){
arrayList = (ArrayList)list;
}
else {
arrayList = new ArrayList();
arrayList.addAll(list);
}
ArrayList arrayList ;
if (list instanceof ArrayList){
arrayList = (ArrayList)list;
}
else {
arrayList = new ArrayList();
arrayList.addAll(list);
}
解决方案 »
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