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java中List轉陣列,陣列轉List

廢話不說,直接上程式碼

List轉成陣列

List<String> nameList = new ArrayList<>();
nameList .add("123');
nameList .add("123');
nameList .add("123');
//轉成陣列
String[] arr = nameList.toArray(new String[nameList.size()]);

陣列轉成List
String[] arr = new String[] {"1", "2"};
List list = Arrays.asList(arr);