Java do-while 循环在其自身的方法内 class
Java do-while loop inside a method in its own class
我是 java 的新手，我们并没有真正复习这些方法，但它是项目所必需的。我试图将整个两个 do-while 循环放入我可以在 public void run() 中调用的方法中。有人可以指导我如何完成它吗？我试图将这个带有内部和外部 do-while 循环的嵌套循环放在它自己的方法内，可能在它自己的 class 也
内
完整代码如下：
do 循环开始的部分我试图将它放在自己的方法中，我该如何完成呢？
App.java
import acm.program.*;
public class App extends ConsoleProgram
{
public void init()
{
setSize(300,600);
}
public void run()
{
// Counter variables
int n = 0;
int counter = 0;
int score = 0;
n = readInt("How many times did you take this quiz: ");
/*
* Printing questions
*/
// First Question
Questions questionOne = new Questions();
println(" ");
questionOne.SetQuestion("Question 1: ");
questionOne.SetChoice1("Answer a: ");
questionOne.SetChoice2("Answer b: ");
questionOne.SetChoice3("Answer c: ");
questionOne.SetChoice4("Answer d: ");
questionOne.SetCorrectAnswer("b");
// Second Question
Questions questionTwo = new Questions();
println(" ");
questionTwo.SetQuestion("Question 2: ");
questionTwo.SetChoice1("Answer a: ");
questionTwo.SetChoice2("Answer b: ");
questionTwo.SetChoice3("Answer c: ");
questionTwo.SetChoice4("Answer d: ");
questionTwo.SetCorrectAnswer("d");
// Third Question (Hard Question)
Questions questionThree = new Questions();
println(" ");
questionThree.SetQuestion("Question 3: ");
questionThree.SetChoice1("Answer a: ");
questionThree.SetChoice2("Answer b: ");
questionThree.SetChoice3("Answer c: ");
questionThree.SetChoice4("Answer d: ");
questionThree.SetCorrectAnswer("a");
// CREATE A METHOD FOR THIS DO-WHILE LOOP.
do
{
if ( n <= 3 )
{
println("You may now take the quiz!");
println(" ");
}
else
{
println("You're out of quiz attempts. You have already taken it 3 times.");
break;
}
do
{
score = 0;
if (counter==5)
{
println("You scored less than 100%");
println("Take a break! You may retake the quiz on a later date. ");
break;
}
// print question 1
println(questionOne.PrintQuestion());
// input answer for question number 1
String yourAnswer = readLine("Your answer: ");
println(" ");
// check if the question 1 is correct, if it is, add 1 to the score++
if (questionOne.IsAnswerCorrect(yourAnswer))
{
score++;
println("You got it right!");
}
else // if its not correct, print you got it wrong
{
println("You got it wrong!");
println(" ");
println(" ");
}
// print question 2
println(questionTwo.PrintQuestion());
// input answer for question number 2
String yourAnswer2 = readLine("Your answer: ");
println(" ");
// check if the question 2 is correct, if it is, add 1 to the score++
if (questionTwo.IsAnswerCorrect(yourAnswer2))
{
score++;
println("You got it right!");
}
else // if its not correct, print you got it wrong
{
println("You got it wrong!");
println(" ");
println(" ");
}
// print question 3
println(questionThree.PrintQuestion());
// input answer for question number 3
String yourAnswer3 = readLine("Your answer: ");
println(" ");
// checking for hard question. To make it easier, we're using boolean to check for the hard question
boolean hardQuestion = false;
// check if the question 3 is correct, if it is, add 1 to the score++ // hard question becomes true
if (questionThree.IsAnswerCorrect(yourAnswer3))
{
score++;
println("You got it right!");
println(" ");
hardQuestion = true;
}
else
{
println("You got it wrong!");
println(" ");
println(" ");
}
if (score == 0)
{
println("You need more practice!");
println(" ");
}
// if you got at least the hard one right, your score is of 1 and that is what gets printed out
else if (score == 1)
{
if (hardQuestion)
{
println("Well, at least you got the hard one correct! ");
println(" ");
}
else
{
// if the other ones are correct, print out this message if hard is wrong
println("You need to warm up!");
println(" ");
}
}
// if you got at least two correct
else if (score == 2)
{
if (hardQuestion)
{
// user got one correct and hard one correct
println("You are amazing!");
println(" ");
}
else
{
// if hard one was wrong
println("You're on your way!");
println(" ");
}
}
else
{
// all answers are correct including the hard ones
println("You are a scholar!");
println(" ");
println("Congradulations you passed! You got 100% on the quiz!");
break;
}
// count number of tries the quiz has been looped
counter++;
if (counter < 5)
{
println("You scored less than 100%");
println(" ");
println(" ");
println("Try again!");
println(" ");
}
} while (true); // end program loop
break;
} while (true); // end while loop
} // closing public run
} // closing public class
私人字符串问题代码：
Questions.java
public class Questions {
private String _question;
private String _correctAnswer;
private String _correctAnswer2;
private String _correctAnswer3;
private String _choice1, _choice2, _choice3, _choice4;
public void SetQuestion(String q)
{
_question = q;
}
public String GetQuestion()
{
return _question;
}
public void SetCorrectAnswer(String c)
{
_correctAnswer = c;
}
public String GetCorrectAnswer()
{
return _correctAnswer;
}
public void SetCorrectAnswer2(String b)
{
_correctAnswer2 = b;
}
public String GetCorrectAnswer2()
{
return _correctAnswer2;
}
public void SetCorrectAnswer3(String a)
{
_correctAnswer3 = a;
}
public String GetCorrectAnswer3()
{
return _correctAnswer3;
}
public void SetChoice1(String a)
{
_choice1 = a;
}
public void SetChoice2(String b)
{
_choice2 = b;
}
public void SetChoice3(String c)
{
_choice3 = c;
}
public void SetChoice4(String d)
{
_choice4 = d;
}
public String PrintQuestion()
{
String result = " ";
result = _question + "\n" + _choice1 + "\n" + _choice2 + "\n" + _choice3 + "\n" + _choice4 + "\n";
return result;
}
public boolean IsAnswerCorrect(String a)
{
return _correctAnswer.equals(a);
}
/*public boolean IsAnswerCorrect2(String b)
{
return _correctAnswer2.equals(b);
}*/
}
您可以使用此代码或根据您的需要进行必要的修改，只是它有一个方法，它接受一个 Questions 的数组，然后通过从数组
中取出问题来执行操作
import acm.program.*;
public class App extends ConsoleProgram
{
int n = 0;
int counter = 0;
int score = 0;
public void init()
{
setSize(300,600);
}
public void run()
{
// reset counter variables
n = 0;
counter = 0;
score = 0;
n = readInt("How many times did you take this quiz: ");
/*
* Printing questions
*/
// First Question
Questions questionOne = new Questions();
println(" ");
questionOne.SetQuestion("Question 1: ");
questionOne.SetChoice1("Answer a: ");
questionOne.SetChoice2("Answer b: ");
questionOne.SetChoice3("Answer c: ");
questionOne.SetChoice4("Answer d: ");
questionOne.SetCorrectAnswer("b");
// Second Question
Questions questionTwo = new Questions();
println(" ");
questionTwo.SetQuestion("Question 2: ");
questionTwo.SetChoice1("Answer a: ");
questionTwo.SetChoice2("Answer b: ");
questionTwo.SetChoice3("Answer c: ");
questionTwo.SetChoice4("Answer d: ");
questionTwo.SetCorrectAnswer("d");
// Third Question (Hard Question)
Questions questionThree = new Questions();
println(" ");
questionThree.SetQuestion("Question 3: ");
questionThree.SetChoice1("Answer a: ");
questionThree.SetChoice2("Answer b: ");
questionThree.SetChoice3("Answer c: ");
questionThree.SetChoice4("Answer d: ");
questionThree.SetCorrectAnswer("a");
evaluate(new Questions[]{questionOne,questionTwo,questionThree});
} // closing public run
private void evaluate(Questions[] q){
// METHOD FOR DO-WHILE LOOP.
do
{
if ( n <= 3 )
{
println("You may now take the quiz!");
println(" ");
}
else
{
println("You're out of quiz attempts. You have already taken it 3 times.");
break;
}
do
{
score = 0;
if (counter==5)
{
println("You scored less than 100%");
println("Take a break! You may retake the quiz on a later date. ");
break;
}
// print question 1
println(q[0].PrintQuestion());
// input answer for question number 1
String yourAnswer = readLine("Your answer: ");
println(" ");
// check if the question 1 is correct, if it is, add 1 to the score++
if (q[0].IsAnswerCorrect(yourAnswer))
{
score++;
println("You got it right!");
}
else // if its not correct, print you got it wrong
{
println("You got it wrong!");
println(" ");
println(" ");
}
// print question 2
println(q[1].PrintQuestion());
// input answer for question number 2
String yourAnswer2 = readLine("Your answer: ");
println(" ");
// check if the question 2 is correct, if it is, add 1 to the score++
if (q[1].IsAnswerCorrect(yourAnswer2))
{
score++;
println("You got it right!");
}
else // if its not correct, print you got it wrong
{
println("You got it wrong!");
println(" ");
println(" ");
}
// print question 3
println(q[2].PrintQuestion());
// input answer for question number 3
String yourAnswer3 = readLine("Your answer: ");
println(" ");
// checking for hard question. To make it easier, we're using boolean to check for the hard question
boolean hardQuestion = false;
// check if the question 3 is correct, if it is, add 1 to the score++ // hard question becomes true
if (q[2].IsAnswerCorrect(yourAnswer3))
{
score++;
println("You got it right!");
println(" ");
hardQuestion = true;
}
else
{
println("You got it wrong!");
println(" ");
println(" ");
}
if (score == 0)
{
println("You need more practice!");
println(" ");
}
// if you got at least the hard one right, your score is of 1 and that is what gets printed out
else if (score == 1)
{
if (hardQuestion)
{
println("Well, at least you got the hard one correct! ");
println(" ");
}
else
{
// if the other ones are correct, print out this message if hard is wrong
println("You need to warm up!");
println(" ");
}
}
// if you got at least two correct
else if (score == 2)
{
if (hardQuestion)
{
// user got one correct and hard one correct
println("You are amazing!");
println(" ");
}
else
{
// if hard one was wrong
println("You're on your way!");
println(" ");
}
}
else
{
// all answers are correct including the hard ones
println("You are a scholar!");
println(" ");
println("Congradulations you passed! You got 100% on the quiz!");
break;
}
// count number of tries the quiz has been looped
counter++;
if (counter < 5)
{
println("You scored less than 100%");
println(" ");
println(" ");
println("Try again!");
println(" ");
}
} while (true); // end program loop
break;
} while (true); // end while loop
}
} // closing public class
我是 java 的新手，我们并没有真正复习这些方法，但它是项目所必需的。我试图将整个两个 do-while 循环放入我可以在 public void run() 中调用的方法中。有人可以指导我如何完成它吗？我试图将这个带有内部和外部 do-while 循环的嵌套循环放在它自己的方法内，可能在它自己的 class 也
完整代码如下：
do 循环开始的部分我试图将它放在自己的方法中，我该如何完成呢？
App.java
import acm.program.*;
public class App extends ConsoleProgram
{
public void init()
{
setSize(300,600);
}
public void run()
{
// Counter variables
int n = 0;
int counter = 0;
int score = 0;
n = readInt("How many times did you take this quiz: ");
/*
* Printing questions
*/
// First Question
Questions questionOne = new Questions();
println(" ");
questionOne.SetQuestion("Question 1: ");
questionOne.SetChoice1("Answer a: ");
questionOne.SetChoice2("Answer b: ");
questionOne.SetChoice3("Answer c: ");
questionOne.SetChoice4("Answer d: ");
questionOne.SetCorrectAnswer("b");
// Second Question
Questions questionTwo = new Questions();
println(" ");
questionTwo.SetQuestion("Question 2: ");
questionTwo.SetChoice1("Answer a: ");
questionTwo.SetChoice2("Answer b: ");
questionTwo.SetChoice3("Answer c: ");
questionTwo.SetChoice4("Answer d: ");
questionTwo.SetCorrectAnswer("d");
// Third Question (Hard Question)
Questions questionThree = new Questions();
println(" ");
questionThree.SetQuestion("Question 3: ");
questionThree.SetChoice1("Answer a: ");
questionThree.SetChoice2("Answer b: ");
questionThree.SetChoice3("Answer c: ");
questionThree.SetChoice4("Answer d: ");
questionThree.SetCorrectAnswer("a");
// CREATE A METHOD FOR THIS DO-WHILE LOOP.
do
{
if ( n <= 3 )
{
println("You may now take the quiz!");
println(" ");
}
else
{
println("You're out of quiz attempts. You have already taken it 3 times.");
break;
}
do
{
score = 0;
if (counter==5)
{
println("You scored less than 100%");
println("Take a break! You may retake the quiz on a later date. ");
break;
}
// print question 1
println(questionOne.PrintQuestion());
// input answer for question number 1
String yourAnswer = readLine("Your answer: ");
println(" ");
// check if the question 1 is correct, if it is, add 1 to the score++
if (questionOne.IsAnswerCorrect(yourAnswer))
{
score++;
println("You got it right!");
}
else // if its not correct, print you got it wrong
{
println("You got it wrong!");
println(" ");
println(" ");
}
// print question 2
println(questionTwo.PrintQuestion());
// input answer for question number 2
String yourAnswer2 = readLine("Your answer: ");
println(" ");
// check if the question 2 is correct, if it is, add 1 to the score++
if (questionTwo.IsAnswerCorrect(yourAnswer2))
{
score++;
println("You got it right!");
}
else // if its not correct, print you got it wrong
{
println("You got it wrong!");
println(" ");
println(" ");
}
// print question 3
println(questionThree.PrintQuestion());
// input answer for question number 3
String yourAnswer3 = readLine("Your answer: ");
println(" ");
// checking for hard question. To make it easier, we're using boolean to check for the hard question
boolean hardQuestion = false;
// check if the question 3 is correct, if it is, add 1 to the score++ // hard question becomes true
if (questionThree.IsAnswerCorrect(yourAnswer3))
{
score++;
println("You got it right!");
println(" ");
hardQuestion = true;
}
else
{
println("You got it wrong!");
println(" ");
println(" ");
}
if (score == 0)
{
println("You need more practice!");
println(" ");
}
// if you got at least the hard one right, your score is of 1 and that is what gets printed out
else if (score == 1)
{
if (hardQuestion)
{
println("Well, at least you got the hard one correct! ");
println(" ");
}
else
{
// if the other ones are correct, print out this message if hard is wrong
println("You need to warm up!");
println(" ");
}
}
// if you got at least two correct
else if (score == 2)
{
if (hardQuestion)
{
// user got one correct and hard one correct
println("You are amazing!");
println(" ");
}
else
{
// if hard one was wrong
println("You're on your way!");
println(" ");
}
}
else
{
// all answers are correct including the hard ones
println("You are a scholar!");
println(" ");
println("Congradulations you passed! You got 100% on the quiz!");
break;
}
// count number of tries the quiz has been looped
counter++;
if (counter < 5)
{
println("You scored less than 100%");
println(" ");
println(" ");
println("Try again!");
println(" ");
}
} while (true); // end program loop
break;
} while (true); // end while loop
} // closing public run
} // closing public class
私人字符串问题代码：
Questions.java
public class Questions {
private String _question;
private String _correctAnswer;
private String _correctAnswer2;
private String _correctAnswer3;
private String _choice1, _choice2, _choice3, _choice4;
public void SetQuestion(String q)
{
_question = q;
}
public String GetQuestion()
{
return _question;
}
public void SetCorrectAnswer(String c)
{
_correctAnswer = c;
}
public String GetCorrectAnswer()
{
return _correctAnswer;
}
public void SetCorrectAnswer2(String b)
{
_correctAnswer2 = b;
}
public String GetCorrectAnswer2()
{
return _correctAnswer2;
}
public void SetCorrectAnswer3(String a)
{
_correctAnswer3 = a;
}
public String GetCorrectAnswer3()
{
return _correctAnswer3;
}
public void SetChoice1(String a)
{
_choice1 = a;
}
public void SetChoice2(String b)
{
_choice2 = b;
}
public void SetChoice3(String c)
{
_choice3 = c;
}
public void SetChoice4(String d)
{
_choice4 = d;
}
public String PrintQuestion()
{
String result = " ";
result = _question + "\n" + _choice1 + "\n" + _choice2 + "\n" + _choice3 + "\n" + _choice4 + "\n";
return result;
}
public boolean IsAnswerCorrect(String a)
{
return _correctAnswer.equals(a);
}
/*public boolean IsAnswerCorrect2(String b)
{
return _correctAnswer2.equals(b);
}*/
}
您可以使用此代码或根据您的需要进行必要的修改，只是它有一个方法，它接受一个 Questions 的数组，然后通过从数组
import acm.program.*;
public class App extends ConsoleProgram
{
int n = 0;
int counter = 0;
int score = 0;
public void init()
{
setSize(300,600);
}
public void run()
{
// reset counter variables
n = 0;
counter = 0;
score = 0;
n = readInt("How many times did you take this quiz: ");
/*
* Printing questions
*/
// First Question
Questions questionOne = new Questions();
println(" ");
questionOne.SetQuestion("Question 1: ");
questionOne.SetChoice1("Answer a: ");
questionOne.SetChoice2("Answer b: ");
questionOne.SetChoice3("Answer c: ");
questionOne.SetChoice4("Answer d: ");
questionOne.SetCorrectAnswer("b");
// Second Question
Questions questionTwo = new Questions();
println(" ");
questionTwo.SetQuestion("Question 2: ");
questionTwo.SetChoice1("Answer a: ");
questionTwo.SetChoice2("Answer b: ");
questionTwo.SetChoice3("Answer c: ");
questionTwo.SetChoice4("Answer d: ");
questionTwo.SetCorrectAnswer("d");
// Third Question (Hard Question)
Questions questionThree = new Questions();
println(" ");
questionThree.SetQuestion("Question 3: ");
questionThree.SetChoice1("Answer a: ");
questionThree.SetChoice2("Answer b: ");
questionThree.SetChoice3("Answer c: ");
questionThree.SetChoice4("Answer d: ");
questionThree.SetCorrectAnswer("a");
evaluate(new Questions[]{questionOne,questionTwo,questionThree});
} // closing public run
private void evaluate(Questions[] q){
// METHOD FOR DO-WHILE LOOP.
do
{
if ( n <= 3 )
{
println("You may now take the quiz!");
println(" ");
}
else
{
println("You're out of quiz attempts. You have already taken it 3 times.");
break;
}
do
{
score = 0;
if (counter==5)
{
println("You scored less than 100%");
println("Take a break! You may retake the quiz on a later date. ");
break;
}
// print question 1
println(q[0].PrintQuestion());
// input answer for question number 1
String yourAnswer = readLine("Your answer: ");
println(" ");
// check if the question 1 is correct, if it is, add 1 to the score++
if (q[0].IsAnswerCorrect(yourAnswer))
{
score++;
println("You got it right!");
}
else // if its not correct, print you got it wrong
{
println("You got it wrong!");
println(" ");
println(" ");
}
// print question 2
println(q[1].PrintQuestion());
// input answer for question number 2
String yourAnswer2 = readLine("Your answer: ");
println(" ");
// check if the question 2 is correct, if it is, add 1 to the score++
if (q[1].IsAnswerCorrect(yourAnswer2))
{
score++;
println("You got it right!");
}
else // if its not correct, print you got it wrong
{
println("You got it wrong!");
println(" ");
println(" ");
}
// print question 3
println(q[2].PrintQuestion());
// input answer for question number 3
String yourAnswer3 = readLine("Your answer: ");
println(" ");
// checking for hard question. To make it easier, we're using boolean to check for the hard question
boolean hardQuestion = false;
// check if the question 3 is correct, if it is, add 1 to the score++ // hard question becomes true
if (q[2].IsAnswerCorrect(yourAnswer3))
{
score++;
println("You got it right!");
println(" ");
hardQuestion = true;
}
else
{
println("You got it wrong!");
println(" ");
println(" ");
}
if (score == 0)
{
println("You need more practice!");
println(" ");
}
// if you got at least the hard one right, your score is of 1 and that is what gets printed out
else if (score == 1)
{
if (hardQuestion)
{
println("Well, at least you got the hard one correct! ");
println(" ");
}
else
{
// if the other ones are correct, print out this message if hard is wrong
println("You need to warm up!");
println(" ");
}
}
// if you got at least two correct
else if (score == 2)
{
if (hardQuestion)
{
// user got one correct and hard one correct
println("You are amazing!");
println(" ");
}
else
{
// if hard one was wrong
println("You're on your way!");
println(" ");
}
}
else
{
// all answers are correct including the hard ones
println("You are a scholar!");
println(" ");
println("Congradulations you passed! You got 100% on the quiz!");
break;
}
// count number of tries the quiz has been looped
counter++;
if (counter < 5)
{
println("You scored less than 100%");
println(" ");
println(" ");
println("Try again!");
println(" ");
}
} while (true); // end program loop
break;
} while (true); // end while loop
}
} // closing public class