string.substring(0,indexof())
时间: 2023-11-25 18:07:18 浏览: 36
这是一个 Java 语言中的字符串操作,它的作用是截取字符串中从开头到指定字符或子字符串第一次出现的位置之间的部分。具体来说,`substring` 方法接受一个整数参数 `indexof`,它表示要截取的子字符串的结尾位置。`substring` 方法会返回从字符串开头到该位置(不包括该位置)的子字符串。这样做可以将字符串中的一部分提取出来,供后续的处理使用。
相关问题
String.substring
The String.substring() method is used to extract a portion of a string and returns a new string. It takes two parameters: the starting index and the ending index. The starting index is the position at which the extraction should begin (inclusive), and the ending index is the position at which the extraction should end (exclusive). If the ending index is not provided, the substring will include all characters from the starting index to the end of the string.
Syntax:
string.substring(startIndex, endIndex)
Example:
let str = "Hello World";
let substr1 = str.substring(0,5); // "Hello"
let substr2 = str.substring(6); // "World"
string.substring(1)
As an AI language model, I do not have a specific string to work with. However, I can provide a general explanation of what the code "string.substring(1)" does.
The code "string.substring(1)" is used to extract a portion of a string starting at the second character and ending at the end of the string. The "1" inside the parentheses specifies the starting index of the substring. The first character of the string has an index of 0, so a starting index of 1 means the second character of the string.
For example, if the original string is "Hello world", then "string.substring(1)" would return the substring "ello world", starting from the second character "e" and ending at the end of the string.