java请输入星期几的第一个字母来判断一下是星期几，如果第一个字母一样，则继续 判断第二个字母.代码

下面是Java代码实现：

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入星期几的第一个字母：");
        char ch = scanner.next().charAt(0);
        char second = ' ';
        if (ch == 'M' || ch == 'm') {
            System.out.println("Monday");
        } else if (ch == 'W' || ch == 'w') {
            System.out.println("Wednesday");
        } else if (ch == 'F' || ch == 'f') {
            System.out.println("Friday");
        } else if (ch == 'T' || ch == 't') {
            System.out.print("请输入第二个字母：");
            second = scanner.next().charAt(0);
            if (second == 'u' || second == 'U') {
                System.out.println("Tuesday");
            } else if (second == 'h' || second == 'H') {
                System.out.println("Thursday");
            } else {
                System.out.println("输入错误！");
            }
        } else if (ch == 'S' || ch == 's') {
            System.out.print("请输入第二个字母：");
            second = scanner.next().charAt(0);
            if (second == 'a' || second == 'A') {
                System.out.println("Saturday");
            } else if (second == 'u' || second == 'U') {
                System.out.println("Sunday");
            } else {
                System.out.println("输入错误！");
            }
        } else {
            System.out.println("输入错误！");
        }
    }
}