java - Switch case 算法 Java 问题(需要新的 while 循环？)

Question

我正在尝试根据我的数组值运行 switch 语句。

我需要创建一个 while 循环，遍历整个数组，如果数组位 value = 0 我需要它来运行 case 0如果位 value = 1 我需要它来运行 case 1

我需要运行 while 循环，直到它完成数组值和相应的大小写切换函数的运行

我正在处理的代码:

        Scanner scan = new Scanner(System.in);
        System.out.println("What position do you want the top card to be moved to?");
        System.out.println("Enter \"1\", \"2\", \"3\", \"4\" or \"5\"");
        int i = scan.nextInt();
        int in = i -1;
        //System.out.println(i);
        String binaryString = Integer.toBinaryString(in);
        System.out.println(binaryString);
        int foo = Integer.parseInt(binaryString, 2);
        System.out.println(foo);

        String[] array = binaryString.split("\\|", -1);
            System.out.println(Arrays.toString(array));


            switch (foo) {
            case 0:
            cardForceOutShuffle();
            index = 51;
            break;
            case 1:
            cardForceInShuffle();
            index = 51;
            break;
            }

请帮忙。

Answer 1

假设很多的事情，这就是我想出的。请更准确地回答您的问题..

我将我的观点作为注释添加到了一些代码中。

Scanner scan = new Scanner(System.in);
System.out.println("What position do you want the top card to be moved to?");
System.out.println("Enter \"1\", \"2\", \"3\", \"4\" or \"5\"");
int i = scan.nextInt(); // This can lead to an InputMismatchException. Try to check if your input is an integer before you proceed.
int in = i - 1; // Unnecessary

String binaryString = Integer.toBinaryString(in); // Use i-1 directly
char[] charArray = binaryString.toCharArray(); // Since you need each bit you dont need String.split. Just convert to char[]

for (int j = 0; j < charArray.length; j++) {
    switch (charArray[j]) { // This switch is actually useless, since both cases do the same thing.
    case '0':
        cardForceOutShuffle();
        index = 51; // What is index?
        break;
    case '1':
        cardForceOutShuffle();
        index = 51;
        break;
    }
}
scan.close(); // Close your resources if they are not needed anymore.