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in Technique[技术] by (71.8m points)

java 返回值的问题

image.png

就这么一个逻辑我的图片部分代码怎么报错呢? 我每一个分支返回一个值不行吗?必须让我在函数最外面返回 ?
清洗代码如下

private String GetRegisteredFund(Document document) {
    String LastRegisteredFund=document.selectFirst("li:nth-last-child(1) span[class='field-label']").ownText();
    String LastSecondRegisteredFund=document.selectFirst("li:nth-last-child(2) span[class='field-label']").ownText();
    String LastTrirdRegisteredFund=document.selectFirst("li:nth-last-child(3) span[class='field-label']").ownText();
    if (LastRegisteredFund != null) {
        return LastRegisteredFund;
    } else if (LastSecondRegisteredFund != null) {
        return LastSecondRegisteredFund;
    } else if (LastTrirdRegisteredFund != null) {
        return LastTrirdRegisteredFund;
    }
}

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很基础的问题,首先编译器会看到如果LastRegisteredFund 和 LastTrirdRegisteredFund 都不不符合IF的条件,那么方法就没有返回值了,所以必须有个else return,或者独立的return。


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