Java编写将输入字符串按奇偶倒序输出程序,如输入AbcdEfgh,输出hfdbgEcA ;再如输入1234567,输出6427531

Question

Java编写将输入字符串按奇偶倒序输出程序,如输入AbcdEfgh,输出hfdbgEcA ;再如输入1234567,输出6427531
我只会倒序输出

package test;
import java.util.Scanner;
public class _1_逆向输出 {
public static void main(String[] args) throws Exception{

        Scanner scan=new Scanner(System.in);

        System.out.println("请输入内容：");

        String str=scan.nextLine();

        char[] s=str.toCharArray();

        for(int i=s.length-1;i>=0;i--){

        System.out.print(s[i]);}}}

Answer 1

import java.util.Scanner;

public class A {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.nextLine();
        sc.close();
        if(s.length() % 2 == 0){
            for(int i = s.length() - 1;i >= 0;i -= 2){
                System.out.print(s.charAt(i));
            }
            for(int i = s.length() - 2;i >= 0;i -= 2){
                System.out.print(s.charAt(i));
            }
        }else{
            for(int i = s.length() - 2;i >= 0;i -= 2){
                System.out.print(s.charAt(i));
            }
            for(int i = s.length() - 1;i >= 0;i -= 2){
                System.out.print(s.charAt(i));
            }
        }
    }
}