Java - 如何在加号上拆分字符串？ [英] Java - How to split a string on plus signs?

问题描述

我试图在加号上分割算术表达式（例如1 + 2 + 10 + 15）。但是，我没有设法编写适当的正则表达式。我认为这样可行：

I was trying to split an arithmetic expression (eg "1+2+10+15") on the plus signs. However, I didn't manage to write the appropriate regular expression. I thought this would work:

expression.split("\\+");

但不是。你知道正确的解决方案吗？

but it doesn't. Do you know the correct solution?

推荐答案

确实如此。但是 split（...）返回一个数组，它不会将 String 转换为字符串[] 。试试这个：

It does. However split(...) returns an array, it does not "transform" your String into a String[]. Try this:

String expression = "1+2+10+1";
String[] tokens = expression.split("\\+");

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