An index ranges from 0 to length() - 1. The first char value of the sequence is at index 0, the next at index 1, and so on, as for array indexing. If the char value specified by the index is a surrogate, the s
var2 ="Python cjavapy"print"var1[0]: ", var1[0] print"var2[1:5]: ", var2[1:5] 6、负索引(Negative Indexing) 例如: 从字符串的末尾开始计数,将截取倒数第5个字符至倒数第2个(不包括在内): b ="Hello, World!"print(b[-5:-2]) 7、字符串长度(String Length) 要获取字符串的长度,...
* of 16-bit chars in the sequence. * *@returnthe number of chars in this sequence*/intlength();/*** Returns the char value at the specified index. An index ranges from zero * to length() - 1. The first char value of the sequence is at * index zero, the next at index one,...
java.lang Class String TheStringclass represents character strings. All string literals in Java programs, such as"abc", are implemented as instances of this class. Strings are constant; their values cannot be changed after they are created. String buffers support mutable strings. Because String obj...
The String.Substring() method returns the given number of characters (length) from given starting position (index).SyntaxString String.Substring(int index, int length ); Parameter(s)index –is the starting indexing from where you want to extract the substring (indexing starts from 0). length ...
A string is a sequence of characters. We can get specific characters from a string with indexing operations. StringIndexes.kt package com.zetcode fun main() { val s = "blue sky" println(s[0]) println(s[s.length-1]) println(s.first()) ...
{@code String}类表示字符串。所有java程序中的字符文字,例如{@code "abc"},是作为此类的实例实现。 The {@code String}classrepresents character strings. All* string literals in Java programs, such as {@code "abc"}, are* implemented as instances ofthisclass.* *Strings...
包路径:java.lang.String类名称:String方法名:charAt String.charAt介绍 [英]Returns the char value at the specified index. An index ranges from 0 to length() - 1. The first char value of the sequence is at index 0, the next at index 1, and so on, as for array indexing. If the char...
Python supports both indexing, which extracts individual characters from a string, and slicing, which extracts a substring (or slice). To slice, you indicate a range in the format start:end. The start position is included in the returned substring, but the end position is excluded:Python Copy...
It's because indexing in Kotlin starts from 0 not 1. val myString = "Hey there!" var item: Char item = myString[0] // item contains 'H' item = myString[9] // item contains '!' item = myString[10] // Error! String index is out of range item = myString[-1] // Error!