StringBuffer類char charAt(int index) (StringBuffer Class char charAt(int index))

• This method is available in package java.lang.StringBuffer.charAt(int index).

  軟件包java.lang.StringBuffer.charAt(int index)中提供了此方法。

• This method is used to return the character value at the specified index in the method.

  此方法用于返回方法中指定索引處的字符值。

• This method raises IndexOutOfBoundsException if the given index is negative or greater than the length of the StringBuffer object.

  如果給定的索引為負或大于StringBuffer對象的長度，則此方法引發IndexOutOfBoundsException 。

Syntax:

句法：

char charAt(int index){}

Parameter(s):

參數：

We can pass only one object in the method of the StringBuffer i.e index.

我們只能在StringBuffer的方法(即索引)中傳遞一個對象。

Return value:

返回值：

The return type of this method is char that means this method return a character at the given index.

該方法的返回類型為char ，這意味著該方法在給定索引處返回一個字符。

Java程序演示charAt(int index)方法的示例 (Java program to demonstrate example of charAt(int index) method)

import java.lang.StringBuffer;public class StringBufferClass {public static void main(String[] args) {StringBuffer sb = new StringBuffer("Java is a programming language : ");// use charAt(int index) it will return character at the specified index// Display result after implementing charAt(2)System.out.println("The result will be after implementing method charAt(2) is :" + sb.charAt(2));sb = new StringBuffer("Java Support OOPS Concept");// use charAt(int index) it will return character at the specified index// Display result after implementing charAt(5)System.out.println("The result will be after implementing method charAt(5) is :" + sb.charAt(5));} }

Output

輸出量

D:\Programs>javac StringBufferClass.javaD:\Programs>java StringBufferClass The result will be after implementing method charAt(2) is :v The result will be after implementing method charAt(5) is :S

翻譯自: https://www.includehelp.com/java/stringbuffer-char-charat-int-index-method-with-example.aspx

總結

以上是生活随笔為你收集整理的Java StringBuffer char charAt（int index）方法与示例的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。