Java 相当于 C# 列表声明

Question

这个问题已经有答案了:

Initializing ArrayList with some predefined values [duplicate] (13 个回答)

已关闭 5 年前。

我想知道 java 中是否有与此等效的内容:

List<Person> People = new List<Person>(){
    new Person{
        FirstName = "John",
        LastName = "Doe"
    },
    new Person{
        FirstName = "Someone",
        LastName = "Special"
    }
};

当然，假设...有一个名为 Person 的类，其 FirstName 和 LastName 字段带有 {get;set;}

Answer 1

从 Java 9 开始你可以编写

// immutable list
List<Person> People = List.of(
                          new Person("John", "Doe"),
                          new Person("Someone", "Special"));

从 Java 5.0 开始你可以编写

// cannot add or remove from this list but you can replace an element.
List<Person> People = Arrays.asList(
                          new Person("John", "Doe"),
                          new Person("Someone", "Special"));

从 Java 1.4 开始你可以编写

// mutable list
List<Person> People = new ArrayList<Person>() {{
                          add(new Person("John", "Doe"));
                          add(new Person("Someone", "Special"));
                      }};