java - 如何将字符串插入到输出字符串流中

Question

我想简单地编写代码将我的 userItems 插入到输出字符串流 itemsOSS 中。我的每个项目后面都会有一个空格。我希望输出反射(reflect)以下内容，例如“红紫黄退出”:

输出示例，

红紫黄

public class StringStreamOutput {

   public static void main (String [] args) {

      Scanner scnr = new Scanner(System.in);
      String userItem = "";

      StringWriter itemCharStream = new StringWriter();
      PrintWriter itemsOSS = new PrintWriter(itemCharStream);

      System.out.println("Enter items (type Exit to quit):");
      userItem = scnr.next();

      while (!userItem.equals("Exit")) {

         // confused here, 

         userItem = scnr.next();
      }

      userItem = itemCharStream.toString();
      System.out.println(userItem);

      return;
   }
}

Answer 1

我找到了有效的代码，我只需要利用打印方法。

itemsOSS.print(userItem + " "); 

userItem = itemCharStream.toString();