题解 | #按照格式输入并交换输出#

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String str=in.next();
        String[]  s1=str.split(",");//["a=..","b=.."]
        String[]  s02=s1[0].split("=");//["a",".."]
        String[]  s03=s1[1].split("=");//["b",".."]
        System.out.println("a="+s03[1]+","+"b="+s02[1]);
       
    }
}