Collections.emptyList() 和 Collections.EMPTY_LIST 有什么区别

Java
import Java.util.*;
public class EmptyListExample {
    public static void mAIn(String[] args) {
        List<String> emptyList = Collections.emptyList();
        List<String> mutableList = Collections.EMPTY_LIST;
        
        try {
            emptyList.add("element"); // UnsupportedOperationException
        } catch (UnsupportedOperationException e) {
            System.out.println("emptyList 不可添加元素");
        }
        
        try {
            mutableList.add("element");
        } catch (UnsupportedOperationException e) {
            System.out.println("EMPTY_LIST 不可添加元素");
        }
        
        System.out.println("emptyList: " + emptyList); // 输出: []
        System.out.println("mutableList: " + mutableList); // 输出: []
    }
}