charAt java string 函数 java string的函数 string函数 java The methods specified below are some of the most commonly used methods of theStringclass in Java. We will learn about each method with help of small code e
java String 的统计 String.charAt(index) RR1335 用Java / Node / Go做后端的技术开发 package biz.baijing.stringarray; import java.util.Scanner; public class StringStatistics { public static void main(String[] args) { Scanner sc = new Scanner(System.in); System.out.println("请输入一串字符:"...
charAt(int index) description of charAt returns char value at the specified index of string. example of charAt in java package lang; public class Lang { public static void main(String[] args) { String str = "test 1234";
String str = "Hello, World!"; char ch = str.charAt(0); // 获取第一个字符 ch = Character.toUpperCase(ch); // 将其转换为大写 System.out.println("First character in uppercase: " + ch); 复制代码 然而,charAt() 函数也有一些限制: 索引越界:如果传递给 charAt() 函数的索引超出了字符串的...
out.println("The fifth character is: " + fifthChar); // 获取索引为-1的字符(这将抛出StringIndexOutOfBoundsException异常) char invalidChar = str.charAt(-1); } } 复制代码 输出: The first character is: H The fifth character is: o Exception in thread "main" java.lang.StringIndexOutOf...
ExampleGet your own Java Server Return the first character (0) of a string: String myStr = "Hello"; char result = myStr.charAt(0); System.out.println(result); Try it Yourself » Definition and UsageThe charAt() method returns the character at the specified index in a string....
Java String.charAt() returns the character at specified index argument in the string object or literal. The argument must be a valid index.
importjava.util.Scanner;publicclassMain{publicstaticvoidmain(String[]args){Scannerscanner=newScanner(System.in);System.out.print("请输入一个字符串:");Stringinput=scanner.nextLine();for(inti=0;i
Chia sẻ qua Facebook x.com LinkedIn Email In String.CharAt(Int32) MethodReference Feedback DefinitionNamespace: Java.Lang Assembly: Mono.Android.dll Returns the char value at the specified index.C# Sao chép [Android.Runtime.Register("charAt", "(I)C", "")] public char CharAt(int ...
字符串的比较、字符串的拼接、字符串的截取、字符串的修改以及字符串的转换。此外，还介绍了Java中字符...