如何调试我的代码？switch中的string出了问题

Question

package thirdChapter;

import java.util.Scanner;

public class giveAFutureDate {

public static void main(String[] args) {
    Scanner input = new Scanner(System.in);

    System.out.print("Enter today's day:");
    int today = input.nextInt();

    System.out.print("Enter the number of days elapsed since today:");
    int elapsedDay = input.nextInt();

    switch (today) {
    case 0:string todayx = "Sunday";break;
    case 1:string todayx = "Monday";break;
    case 2:string todayx = "Tuesday";break;
    case 3:string todayx = "Wesday";break;
    case 4:string todayx = "Thursday";break;
    case 5:string todayx = "Friday";break;
    case 6:string todayx = "Saturday";

    }

    switch ((today + elapsedDay) % 7) {
    case 0:string todays = "Sunday";break;
    case 1:string todays = "Monday";break;
    case 2:string todays = "Tuesday";break;
    case 3:string todays = "Wesday";break;
    case 4:string todays = "Thursday";break;
    case 5:string todays = "Friday";break;
    case 6:string todays = "Saturday";

    }
    System.out.print("Today is " + todayx + " and the future day is " + todays);
}

}

Answer 1

    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
     
        System.out.print("Enter today's day:");
        int today = input.nextInt();
     
        System.out.print("Enter the number of days elapsed since today:");
        int elapsedDay = input.nextInt();
        
        String todayx = null;
        String todays = null;
     
        switch (today) {
        case 0: todayx = "Sunday";break;
        case 1: todayx = "Monday";break;
        case 2: todayx = "Tuesday";break;
        case 3: todayx = "Wesday";break;
        case 4: todayx = "Thursday";break;
        case 5: todayx = "Friday";break;
        case 6: todayx = "Saturday";
     
        }
     
        switch ((today + elapsedDay) % 7) {
        case 0: todays = "Sunday";break;
        case 1: todays = "Monday";break;
        case 2: todays = "Tuesday";break;
        case 3: todays = "Wesday";break;
        case 4: todays = "Thursday";break;
        case 5: todays = "Friday";break;
        case 6: todays = "Saturday";
     
        }
        System.out.print("Today is " + todayx + " and the future day is " + todays);
    }