java - 我的 else 语句似乎不起作用(JAVA)

Question

import java.util.Scanner;
import static java.lang.System.*;

public class Whativelearned {

    enum MyfirstEnum {one, two, three}

    public static void main(String[] args) {
        Scanner keyboardinput = new Scanner(in);
        MyfirstEnum trolley;
        char a1;

        out.println("Do you pee in the shower"? Y/N");
        a1 = keyboardinput.findWithinHorizon(".", 0).charAt(0);


        if (a1=='Y'||a1=='y') {
            trolley=MyfirstEnum.one;
            out.println("Ewwwwwww");
        }


        if (a1=='N'||a1=='n') {
            trolley=MyfirstEnum.two;
            out.println("Well somebody isn't being very honest");
        }else {
            out.println("You're not so keen on following instructions, are you?");
        }

        keyboardinput.close();
    }

}

我希望我的 else 语句能够涵盖除 if 情况之外的所有结果。
正如我期望的那样 (!(a1=='Y'||(a1=='y'||a1=='n'||a2=='N'))

但是当我运行它时，列出的 else 语句似乎在所有情况下都会执行。

Answer 1

试试这个

if (a1=='Y' || a1=='y') {
    trolley=MyfirstEnum.one;
    out.println("Ewwwwwww");
} else if (a1=='N' || a1=='n') {
    trolley = MyfirstEnum.two;
    out.println("Well somebody isn't being very honest");
} else {
    out.println("You're not so keen on following instructions, are you?");
}