How to convert array to list collection in java?

How to convert an array into a list collection in java: 1. Use the native method and use a for() loop to split the array and add it to the List; 2. Use the Arrays.asList() method; 3 , use Collections.addAll() method; 4. Use List.of() method.

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Problem Description: For the given array below , how to convert into List collection?

String[] array = {"a","b","c"};

Refer to stackoverflow to summarize the following writing methods:

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

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

2. Use Arrays.asList()

List<String> resultList= new ArrayList<>(Arrays.asList(array));

Note: When calling Arrays.asList(), its return value type is ArrayList, but this ArrayList is an internal class of Array. When calling add(), an error will be reported: java.lang.UnsupportedOperationException, and the result will be Because a certain value in the array changes, a new ArrayList needs to be constructed again.

3. Use Collections.addAll()

List<String> resultList = new ArrayList<>(array.length);
Collections.addAll(resultList,array);

4. Use List.of()

This method is a new method for Java 9 and is defined in the List interface, and It is a static method, so it can be called directly from the class name.

List<String> resultList = List.of(array);

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