如何使用输入将正好5个字符放在一个字符串中并将它们分开

Posted 2021-04-08

基本上我正在尝试用Java创建一个代码，我输入5个字母，例如“Hello”。代码需要吐出一个输出，每个字母间隔十个间距。我还必须使用printf并使用％将它们分开。通过使用.replace，我能够在不使用％的情况下执行此操作，但这不是我应该做的。所以输出应该是：H e l l o

Scanner scanner = new Scanner(System.in);
System.out.println("Enter five chatracters: ");
String charoutput = scanner.next();
String charoutput2 = charoutput.replace("", "       ");

System.out.println("You have entered: " +charoutput2);

答案

    Scanner scanner = new Scanner(System.in);
    System.out.println("Enter five chatracters: ");

    // You can include validation of the length of the input line if necessary
    String answer = scanner.next();
    String[] charArr = answer.substring(0, 5).split("");
    String result = Arrays.stream(charArr)
            .map(p -> String.format("%s%10s", p, ""))
            .collect(Collectors.joining());

    System.out.println(result);
    scanner.close();