Question

正如标题所述，我试图使用扫描仪首先打印输入的两个单词。之后，我需要另外一个单词，然后打印前两个单词的最后一个单词，输入下一个单词。这是我尝试过的：

  Scanner in = new Scanner(System.in);

  System.out.println("TYPE MANY WORDS, ONE PER LINE:");

  String prev = in.next();

  while(in.hasNext())
  {
    String word = in.next();

    System.out.println(prev);

    System.out.println(word); 
  }

Answer 1

对于后续迭代，您需要为prev

指定一些内容

试

Scanner in = new Scanner(System.in);

System.out.println("TYPE MANY WORDS, ONE PER LINE:");

String prev = in.next();

  while(in.hasNext())
  {
    String word = in.next();
    System.out.println(prev);
    System.out.println(word); 

    prev = word;

    if (word.equals ("q")) break;
  }

Answer 2

 Scanner in = new Scanner(System.in);

  System.out.println("TYPE MANY WORDS, ONE PER LINE:");

  String prev = in.next();

  while(in.hasNext())
  {
    String word = in.next();

    System.out.println(prev);

    System.out.println(word);

    prev = word; 
  }

您需要存储上一个单词。

打印上一页＆amp;使用扫描仪的新单词

2 个答案: