How to convert array to List in Java?

1. Use native mode, split the array, and add it to List

List resultList = new ArrayList<>(array.length);
for (String s : array) {
resultList.add(s);
}

2. Use Arrays.asList()

ListresultList=newArrayList<>(Arrays.asList)；

Note: When Arrays.asList() is called, its return value type is ArrayList, but this ArrayList is an internal category of Array. When add() is called, it will report an error: java.lang.UnsupportedOperationException, the result will change due to a certain value in the array, so a new ArrayList needs to be rebuilt.

3. Use Collections.addAll()

private void testArrayCastToListEfficient(){
  String[] strArray = new String[2];
  ArrayList< String> arrayList = new ArrayList<String>(strArray.length);
  Collections.addAll(arrayList, strArray);
  arrayList.add("1");
  System.out.println(arrayList);
 }

4. Use List.of()

List resultList = List.of(array);

This method is a new method in Java 9. It is defined in the List interface. It is a static method and can directly call the class name.

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