题解 | #按照格式输入并交换输出#

import java.util.Scanner;
public class Main{
    public static void main(String[]args){
        Scanner scan = new Scanner(System.in);
        String str = scan.nextLine();
        int i = str.indexOf(",");
        int j = str.indexOf("=");
        String str1=str.substring(j+1,i);
        String str2=str.substring(i+3);
        System.out.println("a="+str2+","+"b="+str1);
        
    }
}