(New String split method) The split method in the String class returns an array of strings consisting of the substrings split by the delimiters. However, the delimiters are not returned. Implement the following new method that returns an array of strings consisting the substrings split by the matching delimiters, including the matching delimiters. public static String[] split(String s, String regex) For example, split(“ab#12#453”, “#”) returns ab,#,12,#,453 in an array of String, and split(“a?b?gf#e”,”[?#]”) returns a, ?, b, ?, gf, #, and e in an array of String.写java代码
时间: 2024-03-07 13:47:11 浏览: 21
```
public static String[] split(String s, String regex) {
// Escape regex meta-characters
regex = regex.replaceAll("[\\[\\](){}+*?^$|\\\\]", "\\\\$0");
// Use regex to split the string and keep the delimiters
return s.split("(?<=(" + regex + "))|(?=(" + regex + "))");
}
```
这个方法首先需要将 `regex` 中的正则表达式元字符进行转义,以避免在 `split` 方法调用时出现错误。然后,使用正则表达式将字符串分割并保留分割符。这里使用了正则表达式的“正向零宽断言”和“正向零宽预测”,即在匹配分隔符的位置插入空字符串来保留分隔符。最后,返回包含分割后的子字符串和分隔符的字符串数组。
相关问题
vscode Cannot find a class with the main method.
This error message means that the Java file you are trying to run does not have a main method defined or the main method is not in the correct format. To fix this error, you need to make sure that your Java file has a main method defined as follows:
```java
public static void main(String[] args) {
// Your code here
}
```
Make sure that the main method is declared as public, static, and void, and that it takes an array of strings as an argument. Also, make sure that the main method is located in the class that you are trying to run.
If you have already defined the main method correctly, then make sure that your project is set up correctly in VS Code and that you are trying to run the correct file.
Must all of the keys of an array be of the same type?
In most programming languages, all keys of an array must be of the same data type. This is because arrays are usually implemented as contiguous blocks of memory, so each element must take up the same amount of space. However, some languages like PHP allow mixed types for associative arrays, where the keys are strings. Overall, it depends on the language and its implementation of arrays.