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How to fix variable might not have been initialized [duplicate]

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0

This question already has an answer here:

• 
  Variable might not have been initialized error
  
  11 answers
  
  

I am trying to create a method that spits out a boolean value if the user enter 1 word that is included in a list of 6. otherwise prompt the user until he enters 1 corrected one

I've tried using a while loop with switch but it doesnt seem to work

 /**
 * If the user says yes or y or true, return boolean value of true
 * if the user says no or n or false, return boolean value of false
 * Display a prompt if user fails to write any of 6 above words until
 * the user does
 */
 public static boolean promptForYesNo(Scanner in, String prompt)userAnswer.equals("no") 

java

share|improve this question

edited Mar 24 at 13:41

forpas

27.3k4830

asked Mar 24 at 13:40

Đằng LongĐằng Long

32

marked as duplicate by LppEdd, Nicholas K, Aniket Sahrawat, John Joe, Svetlin Zarev Mar 25 at 5:08

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

add a comment | 

0

This question already has an answer here:

• 
  Variable might not have been initialized error
  
  11 answers
  
  

I am trying to create a method that spits out a boolean value if the user enter 1 word that is included in a list of 6. otherwise prompt the user until he enters 1 corrected one

I've tried using a while loop with switch but it doesnt seem to work

 /**
 * If the user says yes or y or true, return boolean value of true
 * if the user says no or n or false, return boolean value of false
 * Display a prompt if user fails to write any of 6 above words until
 * the user does
 */
 public static boolean promptForYesNo(Scanner in, String prompt)userAnswer.equals("no") 

java

share|improve this question

edited Mar 24 at 13:41

forpas

27.3k4830

asked Mar 24 at 13:40

Đằng LongĐằng Long

32

marked as duplicate by LppEdd, Nicholas K, Aniket Sahrawat, John Joe, Svetlin Zarev Mar 25 at 5:08

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

add a comment | 

This question already has an answer here:

• 
  Variable might not have been initialized error
  
  11 answers
  
  

I am trying to create a method that spits out a boolean value if the user enter 1 word that is included in a list of 6. otherwise prompt the user until he enters 1 corrected one

I've tried using a while loop with switch but it doesnt seem to work

 /**
 * If the user says yes or y or true, return boolean value of true
 * if the user says no or n or false, return boolean value of false
 * Display a prompt if user fails to write any of 6 above words until
 * the user does
 */
 public static boolean promptForYesNo(Scanner in, String prompt)userAnswer.equals("no") 

java

share|improve this question

edited Mar 24 at 13:41

forpas

27.3k4830

asked Mar 24 at 13:40

Đằng LongĐằng Long

32

 /**
 * If the user says yes or y or true, return boolean value of true
 * if the user says no or n or false, return boolean value of false
 * Display a prompt if user fails to write any of 6 above words until
 * the user does
 */
 public static boolean promptForYesNo(Scanner in, String prompt)userAnswer.equals("no") 

share|improve this question

edited Mar 24 at 13:41

forpas

27.3k4830

asked Mar 24 at 13:40

Đằng LongĐằng Long

32

share|improve this question

edited Mar 24 at 13:41

forpas

27.3k4830

asked Mar 24 at 13:40

Đằng LongĐằng Long

32

edited Mar 24 at 13:41

forpas

27.3k4830

edited Mar 24 at 13:41

forpas

27.3k4830

asked Mar 24 at 13:40

Đằng LongĐằng Long

32

asked Mar 24 at 13:40

Đằng LongĐằng Long

32

2 Answers
2

active

oldest

votes

0

Even if you initialize the variable, it won't satisfy your intention. Instead, you should recursively call the method again with the arguments until you expect the user's intention, like so:

 public static boolean promptForYesNo(Scanner in, String prompt) userAnswer.equals("n") 

I have cleaned up your code a bit.

share|improve this answer

edited Mar 25 at 5:06

Cody Gray♦

197k36390480

answered Mar 24 at 17:25

PrashanthPrashanth

1097

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  dude you're a genius. I just started Java so I'm pretty dumb. I wasnt able to grasp the key point inside of your code : return promptForYesNo(in, prompt) . I knew I had to return some kind of boolean value in order for the method to be usable , I kept thinking of having to tweak it in a way of somehow returning the toReturn variable I wrote inside of my own code. Could you please further elaborate the idea of how return promptForYesNo(in, prompt) was possible ? thank u so much dude
  
  – Đằng Long
  Mar 25 at 4:53
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  if userAnswer doesn't meet the if and else-if condition, it will return to promptForYesNo function.
  
  – John Joe
  Mar 26 at 7:57
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  we are calling the function promptForYesNo until the user entering the expected value. Check this introcs.cs.princeton.edu/java/23recursion to learn more.
  
  – Prashanth
  Mar 27 at 6:13
  
  

  
  
  
  

add a comment | 

1

The above code goes in continuous loop: use break when condition is satisfied

while (conditions) 
 if (conditions) 
 toReturn = true;
 break;
 else if (conditions) 
 toReturn = false;
 break;
 else 
 System.out.println(prompt + "Yes or No?");
 userAnswer = in.next();
 userAnswer = userAnswer.toLowerCase();
 
 

share|improve this answer

answered Mar 24 at 14:10

ShrirajShriraj

313

add a comment | 

0

Even if you initialize the variable, it won't satisfy your intention. Instead, you should recursively call the method again with the arguments until you expect the user's intention, like so:

 public static boolean promptForYesNo(Scanner in, String prompt) userAnswer.equals("n") 

I have cleaned up your code a bit.

share|improve this answer

edited Mar 25 at 5:06

Cody Gray♦

197k36390480

answered Mar 24 at 17:25

PrashanthPrashanth

1097

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  dude you're a genius. I just started Java so I'm pretty dumb. I wasnt able to grasp the key point inside of your code : return promptForYesNo(in, prompt) . I knew I had to return some kind of boolean value in order for the method to be usable , I kept thinking of having to tweak it in a way of somehow returning the toReturn variable I wrote inside of my own code. Could you please further elaborate the idea of how return promptForYesNo(in, prompt) was possible ? thank u so much dude
  
  – Đằng Long
  Mar 25 at 4:53
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  if userAnswer doesn't meet the if and else-if condition, it will return to promptForYesNo function.
  
  – John Joe
  Mar 26 at 7:57
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  we are calling the function promptForYesNo until the user entering the expected value. Check this introcs.cs.princeton.edu/java/23recursion to learn more.
  
  – Prashanth
  Mar 27 at 6:13
  
  

  
  
  
  

add a comment | 

0

Even if you initialize the variable, it won't satisfy your intention. Instead, you should recursively call the method again with the arguments until you expect the user's intention, like so:

 public static boolean promptForYesNo(Scanner in, String prompt) userAnswer.equals("n") 

I have cleaned up your code a bit.

share|improve this answer

edited Mar 25 at 5:06

Cody Gray♦

197k36390480

answered Mar 24 at 17:25

PrashanthPrashanth

1097

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  dude you're a genius. I just started Java so I'm pretty dumb. I wasnt able to grasp the key point inside of your code : return promptForYesNo(in, prompt) . I knew I had to return some kind of boolean value in order for the method to be usable , I kept thinking of having to tweak it in a way of somehow returning the toReturn variable I wrote inside of my own code. Could you please further elaborate the idea of how return promptForYesNo(in, prompt) was possible ? thank u so much dude
  
  – Đằng Long
  Mar 25 at 4:53
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  if userAnswer doesn't meet the if and else-if condition, it will return to promptForYesNo function.
  
  – John Joe
  Mar 26 at 7:57
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  we are calling the function promptForYesNo until the user entering the expected value. Check this introcs.cs.princeton.edu/java/23recursion to learn more.
  
  – Prashanth
  Mar 27 at 6:13
  
  

  
  
  
  

add a comment | 

Even if you initialize the variable, it won't satisfy your intention. Instead, you should recursively call the method again with the arguments until you expect the user's intention, like so:

 public static boolean promptForYesNo(Scanner in, String prompt) userAnswer.equals("n") 

I have cleaned up your code a bit.

share|improve this answer

edited Mar 25 at 5:06

Cody Gray♦

197k36390480

answered Mar 24 at 17:25

PrashanthPrashanth

1097

 public static boolean promptForYesNo(Scanner in, String prompt) userAnswer.equals("n") 

share|improve this answer

edited Mar 25 at 5:06

Cody Gray♦

197k36390480

answered Mar 24 at 17:25

PrashanthPrashanth

1097

edited Mar 25 at 5:06

Cody Gray♦

197k36390480

edited Mar 25 at 5:06

Cody Gray♦

197k36390480

answered Mar 24 at 17:25

PrashanthPrashanth

1097

answered Mar 24 at 17:25

PrashanthPrashanth

1097

1

The above code goes in continuous loop: use break when condition is satisfied

while (conditions) 
 if (conditions) 
 toReturn = true;
 break;
 else if (conditions) 
 toReturn = false;
 break;
 else 
 System.out.println(prompt + "Yes or No?");
 userAnswer = in.next();
 userAnswer = userAnswer.toLowerCase();
 
 

share|improve this answer

answered Mar 24 at 14:10

ShrirajShriraj

313

add a comment | 

1

The above code goes in continuous loop: use break when condition is satisfied

while (conditions) 
 if (conditions) 
 toReturn = true;
 break;
 else if (conditions) 
 toReturn = false;
 break;
 else 
 System.out.println(prompt + "Yes or No?");
 userAnswer = in.next();
 userAnswer = userAnswer.toLowerCase();
 
 

share|improve this answer

answered Mar 24 at 14:10

ShrirajShriraj

313

add a comment | 

The above code goes in continuous loop: use break when condition is satisfied

while (conditions) 
 if (conditions) 
 toReturn = true;
 break;
 else if (conditions) 
 toReturn = false;
 break;
 else 
 System.out.println(prompt + "Yes or No?");
 userAnswer = in.next();
 userAnswer = userAnswer.toLowerCase();
 
 

share|improve this answer

answered Mar 24 at 14:10

ShrirajShriraj

313

while (conditions) 
 if (conditions) 
 toReturn = true;
 break;
 else if (conditions) 
 toReturn = false;
 break;
 else 
 System.out.println(prompt + "Yes or No?");
 userAnswer = in.next();
 userAnswer = userAnswer.toLowerCase();
 
 

share|improve this answer

answered Mar 24 at 14:10

ShrirajShriraj

313

answered Mar 24 at 14:10

ShrirajShriraj

313

answered Mar 24 at 14:10

ShrirajShriraj

313