java中charAt()方法的使用
阿新 • • 發佈:2019-01-29
charAt(int index)方法是一個能夠用來檢索特定索引下的字元的String例項的方法.
charAt()方法返回指定索引位置的char值。索引範圍為0~length()-1.
如: str.charAt(0)檢索str中的第一個字元,str.charAt(str.length()-1)檢索最後一個字元.
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));
}
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));
}
}
結果如下:
T
s