Uso e exemplo do método charAt() da String Java

Java String (String) Methods

O método charAt() da String Java retorna o caractere na posição especificada.

A sintaxe do método charAt() da String Java é:

string.charAt(int index)

Parâmetro do método charAt()

• index - Índice do caractere (valor int)

Retorno do método charAt()

• Retorna o caractere na posição especificada (index)

Note:If the index passed to charAt() is negative or out of range, an exception will be thrown.

Example: Java String charAt() Method

class Main {
　　public static void main(String[] args) {
　　　　String str1　= "Learn Java";
　　　　String str2　= "Learn\nJava";
　　　　//first character
　　　　System.out.println(str1).charAt(0));　//　'L'
　　　　//seventh character
　　　　System.out.println(str1.charAt(6));　//　'J'
　　　　//sixth character
　　　　System.out.println(str2.charAt(5));　//　'\n'
　　}
}

In Java, the index of a string starts from 0, not1. This is why charAt(0) returns the first character. Similarly, charAt(5) and charAt(6) returns the sixth and seventh characters.

To find the index of the first occurrence of a specified character, useJava String indexOf()Methods.

Java String (String) Methods