字符串转化字符&&字符串的遍历

package student;

import java.util.Scanner;

public class Student {
public static void main(String[] args){
Scanner scanner=new Scanner(System.in);
System.out.println(“请输入一个字符串”);
String a=scanner.nextLine();
System.out.println(“请输入你想获取第几个字符”);
int k=scanner.nextInt();
a.toCharArray();//把字符串转化为字符数组
System.out.println(a.charAt(k));
System.out.println(“字符串的遍历：”);
for(int i=0;i<a.length();i++)
System.out.println(a.charAt(i));
}
}