Question

对不起，谈到这个问题我有点无能为力，我在程序的这个特定部分遇到了一些麻烦。

目标是，当有人输入三个字符串时，重新排列它，使“Emma Charlotte Leonard”成为“Leonard，Emma，C”。

这是我到目前为止的具体方法：

public String lastFirst (String str)
{
    Scanner keyboard = new Scanner(System.in);
    System.out.println ("Enter your name");
    String lastFirst = keyboard.nextLine();
    String middleAndLast = lastFirst.substring(lastFirst.indexOf(" ")+ 1);
    String last = middleAndLast.substring(middleAndLast.indexOf(" ") + 1);
    String first = lastFirst.substring(0, lastFirst.indexOf(" "));
    String middle = middleAndLast.substring(0, middleAndLast.indexOf(" "));
    char middleInitial = middle.charAt(0);
    return("\"" + last + ", " + first + ", " + middleInitial + "\"");
}

如果我没有提供足够的信息，我们将不胜感激。

Answer 1

我相信这是你想要实现的目标：

public class RearrangeName{
    public static void main(String[] args){
         Scanner keyboard = new Scanner(System.in);
         System.out.println ("Enter your name");
         String inputStr= keyboard.nextLine();
         System.out.println(lastFirst(inputStr));
    }
    public static String lastFirst (String str){
        String middleAndLast = str.substring(str.indexOf(" ")+ 1);
        String last = middleAndLast.substring(middleAndLast.indexOf(" ") + 1);
        String first = str.substring(0, str.indexOf(" "));
        String middle = middleAndLast.substring(0, middleAndLast.indexOf(" "));
        char middleInitial = middle.charAt(0);
        return("\"" + last + ", " + first + ", " + middleInitial + "\"");
    }
}

请参阅Demo here

Answer 2

你想要输出＆＃34; Leonard，Charlotte，L＆＃34; 或＆＃34; Leonard，Emma，C＆＃34; 。程序的当前输出是第二个选项。如果你想要第一个输出，那么你应该将middleInitial声明为 String middleInitial = last.charAt（0）; 。

Answer 3

尝试以下示例，它将返回＆＃34; Emma Charlotte Leonard＆＃34; as＆＃34;伦纳德，夏洛特，L＆＃34;

public class Example{

public static void main(String[] args) {
    Scanner input = new Scanner(System.in);
    Example exp = new Example();
    System.out.print("Enter your number : ");
    System.out.println(exp.getName(input.nextLine()));
}

private String getName(String name){
    String arr[] = name.split(" ");
    return arr[2]+ ", "+arr[1]+", "+arr[2].substring(0, 1);
}

}

程序运行但没有输出？

3 个答案: