I have a code where in my class I would like to be able to call the method answer twice like `qns.answer(5).answer(7)`

. But right now when I call the method answer as below, I get the error cannot find symbol.

For example:

Question qns = new Question("How many apples are there in the bag?") qns ==> How many apples are there in the bag?: My answer is 0. qns.answer(12) ==> How many apples are there in the bag?: My answer is 12. qns.answer(12).answer(4) ==> How many apples are there in the bag?: My answer is 4. qns qns ==> How many apples are there in the bag?: My answer is 0.

class Question { private final String question; private final int correctAns; public Question(String question, int correctAns) { this.question = question; this.correctAns = correctAns } public String answer(int myAns) { return String.format("%s: My answer is %d.", this.question, myAns); } @Override public String toString() { return String.format("%s: My answer is 0.", this.question); } }

Would appreciate if you could kindly give some pointers on how to get around this.

## Answer

`Question`

can have an extra field to store the answer, and you can also write a new constructor to initialise that field.

private final int currentAns; public Question(String question, int correctAns, int currentAns) { this.question = question; this.correctAns = correctAns; this.currentAns = currentAns; } public Question(String question, int correctAns) { this(question, correctAns, 0); } // toString can now use currentAns! @Override public String toString() { return String.format("%s: My answer is %d.", this.question, currentAns); }

Then in the `answer`

method, you can return a new `Question`

with the specified answer as `currentAns`

:

public Question answer(int myAns) { return new Question(question, correctAns, myAns); }

Now you can chain multiple `ans`

calls. If `toString`

is called at the end of it (whether implicitly or explicitly), you can get the desired string.

Example in JShell:

jshell> Question qns = new Question("How many apples are there in the bag?", 1); qns ==> How many apples are there in the bag?: My answer is 0. jshell> qns.answer(12); $7 ==> How many apples are there in the bag?: My answer is 12. jshell> qns.answer(12).answer(4); $8 ==> How many apples are there in the bag?: My answer is 4. jshell> qns qns ==> How many apples are there in the bag?: My answer is 0.