String x = "a,b,c";
List list = new ArrayList<>(Arrays.asList(x.split(",")));
list.add("d");
System.out.println(list.toString());
需要new ArrayList，否则无法添加，报错如下
java.lang.UnsupportedOperationException
String x = "a,b,c";
List list = new ArrayList<>(Arrays.asList(x.split(",")));
list.add("d");
System.out.println(list.toString());
需要new ArrayList，否则无法添加，报错如下
java.lang.UnsupportedOperationException
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