在Java中是否有一个通配符？ [英] Is there such a thing as a wildcard character in Java?

问题描述

我正在运行一个比较程序，并且在一分钟它做一个直接的字符串到字符串的比较，如果他们是一个完全匹配，它输出，他们是一个匹配。

I'm running a comparison program and at the minute it does a direct 'string-to-string' comparison and if they are an exact match it outputs that they are a match.

好吧，我希望添加一个允许相似的附加功能...

Well, I was hoping to add an additional feature that allowed for 'similarity'...

例如：

String em1 = "52494646";
String em2 = "52400646";


if (em1.equals(em2)){
    output.writeUTF(dir + filenames[i]);
}

这是一段代码。我想要它跳过00，仍然认为它是几乎相同的数字，仍然输出它。

This is sort of a snippet of the code. I'd like it so that it skips over the "00" and still recognises it as 'almost' the same number and still outputs it.

我想象它看起来像 String em2 =524+ ## +646但这显然只是一个概念

I'd imagine it would look something like String em2 = "524"+ ## +"646" but thats obviously just a concept

有人知道如果有一种方法有这种'通配符'（我从whi中选择了一个术语）或者有另一种方法来做这种相似性类型交易。

Does anyone know if there is a way to have this kind of 'wildcard' (a term I've picked up from uni SQL) or if there is another way to do this similarity type deal.

感谢：）

推荐答案

您可以使用正则表达式：

You can use regular expressions:

if (em1.matches("524[0-9]{2}646")) {
  // do stuff
}

这篇关于在Java中是否有一个通配符？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！