java中charAt（）方法的使用

package com.xumingjie.s;

public class Cartat {
 public static void main(String[] args) {
 
   String str = "This is yiibai";
                  
   // prints character at 1st location
   System.out.println(str.charAt(0));
         
   // prints character at 5th location i.e white-space character
   System.out.println(str.charAt(4));
         
   // prints character at 18th location
   System.out.println(str.charAt(6));
 }

}

结果如下:

T
 
s