在JAVA中按特定字词拆分字符串 [英] Split String In JAVA by specific words

问题描述

字符串S ="3乘3加3 3 1"

String S= "multiply 3 add add 3 3 1"

我想得到两个字符串数组一个是{"multiply"，"add"，"add"}另一个是{"3"，"3"，"3"，1}

I want to get two string arrays The one is {"multiply", "add", "add"} Another out is {"3","3","3",1}

我如何得到它?我尝试使用

How can I get it? I tried to use

String operators[] = s.split("[0-9]+"); 
String operands[] =s.split("(?:add|multiply)");

但是，它不起作用.

推荐答案

您可以使用Java 8 groupingBy .

You can use java 8 groupingBy.

Map<Boolean, List<String>> map = Arrays
    .stream(s.split(" "))
    .collect(Collectors.groupingBy(e -> e.matches("\\d+")));

System.out.println(map);

结果是:

{false=[multiply, add, add], true=[3, 3, 3, 1]}

您可以通过以下方式获取运算符和操作数:

You can get operators and operands by:

List<String> operators = map.get(false);
List<String> operands = map.get(true);

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