Question

我正在尝试读取用户输入，然后将这些单词与它们之间的空格连接起来。我在查找循环中的逻辑时遇到了麻烦。我还希望用户能够在完成输入单词后告诉我的程序。这是我到目前为止所做的......它并不多。

LOGIN_URL = 'bookApp:login'
LOGIN_REDIRECT_URL = reverse_lazy('welcome')

Answer 1

Scanner in = new Scanner(System.in);

  String enteredWord = "";
  StringBuilder builder = new sb();
  System.out.println("Enter words to build a sentence");
  enteredWord = in.nextLine();
  do {

      sb.append(enteredWord);
      sb.append(" ");
      enteredWord = in.nextLine();

  } while (!(enteredWord.equals("exit"))); 
//you may want to use a special case like %% instead because exit can be in a sentence{
          System.out.println(sb.toString());

这应该适用于大部分我现在没有任何地方可以测试它。每次循环时，循环都会在其后面添加一个空格，并要求输入一个新单词。您可以使用userwords += in.nextline() + " ";，但在循环中我总是会使用stringbuilder来提高效率。

Answer 2

尝试：

  Scanner in = new Scanner(System.in);
  String userWords = "";
  String currentWord = "";
  // now we print a prompt for user
  System.out.println("Enter words to build a sentence");  
  // here is the reading loop
  do {
      // now we read next line from user
      currentWord = in.nextLine();
      // now we add the user input to the userWords with " "
      userWords += currentWord +" ";
      // we end the loop when the currentWord will be empty
  } while (!(currentWord.trim().isEmpty())); 
  // now we print all the words
  System.out.println(userWords);

使用do while循环连接

2 个答案: