在构造函数中使用数组常量时出现编译器错误 | 在构造函数中使用数组常量时出现编译器错误

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问题描述

public class Sonnet29 implements Poem {
    private String[] poem;
    public Sonnet29() {
        poem = { "foo", "bar" , "baz"};
    }
    @Override
    public void recite() {
      //...
    }
}

行 poem = { "foo", "bar" , "baz"}; 给出编译错误.

不允许这样做的任何具体原因?如何使用数组常量初始化 String 数组?

Any specific reason why this is not allowed?How do I initialize a String array with array constants?

谢谢大家的回答.现在我很清楚什么是允许的，什么是不允许的.但是我能问你为什么这是不允许的吗?

Thank you folks for your answers. Now I'm clear what is allowed and what is NOT.But can I ask you why this is NOT allowed?

String[] pets;
pets = {"cat", "dog"};

谷歌搜索后，我发现了这个链接，在那里，它被告知像这样的编码使编译器含糊不清 - 宠物应该是字符串数组还是对象数组.但是从声明中可以很好的判断出它是一个String数组，对吧???

After googling a bit, I found this link, where in, it is told that coding like this leaves the compiler in ambiguity - whether the pets should be array of Strings or array of Objects. However from the declaration, it can very well figure out that it is a String array, right???

推荐答案

这将满足您的需求:

public Sonnet29() {
    poem = new String[] { "foo", "bar", "baz" };
}

仅在创建数组的新实例时才允许初始化列表.

Initialization lists are only allowed when creating a new instance of the array.

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