我不想写解决方案的代码。只是给予你一些输入，自己得出正确的答案。这毕竟是你的练习。
1.您不需要使用两个Scanner，一个就足够了。
1.执行scnr.nextLine()后检查变量lineString

1. String方法split通常有助于计算

import java.util.Scanner;

public class ParseStrings {
   public static void main(String[] args) {
      Scanner scnr = new Scanner(System.in);
      String userInput = "";
      boolean inputDone = false; 

      while (!inputDone) {
         System.out.print("Enter input string: \n");
         userInput = scnr.nextLine()

         if (userInput.equals("q")){
            System.out.println("First word: " + userInput);
            inputDone = true; 
         } else {
            String[] userArray = userInput.split(",");
            System.out.println("First word: " + userArray[0]);
            System.out.println("Second word: " + userArray[1]);
            System.out.println();
        }
      }

      return;
   }
}

说明：首先创建一个对象Scanner，然后将用户输入的内容存储到userInput中，然后java检查用户是否输入了q，如果是，则结束应用程序，否则java将字符串拆分为两个单词并打印出来。
请记住，理解代码是学习编程语言的一个非常重要的过程，所以请，请理解代码，而不是仅仅复制粘贴它作为家庭作业提交。

我得到了这个相同的问题在我的类，这是一个非常具有挑战性的问题，我弄清楚。我能够得到正确的答案使用代码张贴在这里，只需要非常轻微的修改作出了它。谢谢你的帮助。下面是修改版本的上述代码，我用来得到正确的答案。

import java.util.Scanner;

public class ParseStrings {
   public static void main(String[] args) {
      Scanner scnr = new Scanner(System.in);
      String userInput = "";
      boolean inputDone = false; 

      while (!inputDone) {
         System.out.print("Enter input string: \n");
         userInput = scnr.nextLine();

         if (userInput.equals("q")){
            inputDone = true;
            break;
         }

         if(userInput.indexOf(",") == -1){ //if comma is not found in the user input
         System.out.println("Error: No comma in string");
         continue;
         }

          else {
            String[] userArray = userInput.split(",");
            System.out.println("First word: " + userArray[0].trim());
            System.out.println("Second word: " + userArray[1].trim());
            System.out.println();
            System.out.println();
        }
      }

      return;
   }
}

我为这个问题所做的单元是关于使用inSS的，所以我想尝试用它来解决这个问题。我确实被困在不断地收集第二个单词的逗号，但是在咨询了别人之后，有人建议使用分隔符来传递逗号。我确实不得不添加一个修剪（）命令，以消除inSS捕获单词时单词周围的白色。##

import java.util.Scanner;

public class ParseStrings {
   public static void main(String[] args) {
      Scanner scnr = new Scanner(System.in);
      //Input string stream
       Scanner inSS = null;
    //Input string 
    String inputWords;
    // first word
    String firstWord;
    //Comma check;
    String commaCheck;
    //second word
    String secondWord;
    //flag to indicate next iteration
       boolean inputDone;
    
       inputDone = false;

    //prompt the user to input string 
    System.out.println("Enter input string: ");
    
    //take input data as long as "q" is not ent
    while (!inputDone){
    
        //entire line into inputWords
        inputWords = scnr.nextLine();
        
        //Init scanner object with string
        inSS = new Scanner(inputWords);

        //Set the delimiter to "," and new line
        inSS.useDelimiter("[,\n]");
   
        //process the line
        firstWord = inSS.next();
   
        //output parsed values
        if (firstWord.equals("q")){
            inputDone = true;
            break;
        }
        
        //comma check
        if(inputWords.indexOf(",") == -1){
            System.out.println("Error: No comma in string");
            System.out.println("Enter input string: ");
            continue;
        }
        else {
            secondWord = inSS.next();
            System.out.println("First word: " + firstWord.trim());
            System.out.println("Second word: " + secondWord.trim());
            System.out.println();
            System.out.println();
        }
        System.out.println("Enter input string: ");
                

   
    }

    }   
}

这对我很有效。

import java.util.Scanner;
public class ParseStrings {
   public static void main(String[] args) {

      Scanner scnr = new Scanner(System.in); // Input stream for standard input
      Scanner inSS = null;              // Input string stream       
      String lineString = "";           // Input string   
      String firstWord = "";             // Word one
      String secondWord = "";             // word two
      boolean inputDone = false;
  
      while (!inputDone) {

         System.out.println("Enter input string: ");

         // Entire line into lineString
         lineString = scnr.nextLine();
  
         // Create new input string stream
         inSS = new Scanner(lineString);
     
         //Set the delimiter to "," and new line
         inSS.useDelimiter("[,\n]");
     
         if (lineString.equals("q")) {
            inputDone = true;
            break;
         }
     
         if (lineString.indexOf(",") == -1) {
            System.out.println("Error: No comma in string");
        
            continue;  
     
         }
         else {
  
            // Now process the line           
            firstWord = inSS.next();
            // Now process the line
            secondWord = inSS.next();
  
            System.out.println("First word: " + firstWord.trim().replace(",", ""));
            System.out.println("Second word: " + secondWord.trim().replace(",", "") + "\n\n");
         }   
     
      }
      return;
   }
}