在对象内添加字符串数组[重复]

你可以用 String[] 字面语法,比如

new String[] { "a", "b", "c" }

或 可变参数 参数。就像,

public Question(int id, String question, String... answers) {
    this.id = id;
    this.question = question;
    this.answers = answers;
}

字符串[] 或 使用逗号分隔的答案(或 (文本)来实例化它。

new Question(
    1,
    "This is a question?",
    "This is an answer.", "This is another answer."
)

要创建“answers”参数,一种方法是。

String[] answers = new String[]{"Answer 1", "Answer 2"};

也可以将列表转换为数组。

String[] answers = Arrays.asList("Answer 1", "Answer 2").toArray(new String[0])

new String[] {"Hellow world", "Bo mundo", "Hola Mundo" }

在声明中,可以避免使用“new String[]”的内容,因为java会推断类型,但事实并非如此。因此,如果要创建新问题:

Question question = new Question(1, "2 + 2 = ?", new String[] {"1", "2", "42"});

无论如何,另一个可以用来减少这种冗长的功能是使用“…”。例如,如果您改为编写以下内容

public Question(int id, String question, String... answers) {
    this.id = id;
    this.question = question;
    this.answers = answers;
}

Question question = new Question(1, "2 + 2 = ?", "1", "2", "42"});

其中,一个又一个问题的所有参数都是answers数组的一部分。