Java how to compare Strings with String Arrays

Question

I have been searching here for some time but haven t been able to find the answer to it   I am basically required to use an array for this assignment from college  And then I am supposed to check that the input  which is also a String  matches whatever s stored within the String array   I know one can easily compare Strings by using the  equals   method  However  the same method is not working with the String array   I created the following example of code for the purpose of StackOverflow so you can use it to explain it to me  if you d like   What am I doing wrong   import java util Scanner   class IdiocyCentral       public static void main String   args            Scanner in   new Scanner System in             Prints out the welcome message at the top of the screen           System out printf   55s      WELCOME TO IDIOCY CENTRAL   n            System out printf   55s                                      n             String    codes     G22    K13    I30    S20             System out printf   5s 5s 5s 5s n   codes 0   codes 1   codes 2   codes 3            System out printf  Enter one of the above  n             String usercode   in nextLine             if  codes equals usercode                 System out printf  What s the matter with you  n                      else               System out printf  Youda man                          I apologize if this has been asked before and I just missed it  if its a double question  I will remove it

User · Answer

Instead of using array you can use the ArrayList directly and can use the contains method to check the value which u have passes with the ArrayList

User · Answer

import java util Scanner  import java util    public class Main     public static void main  String  args  throws Exception         Scanner in   new Scanner  System in         Prints out the welcome message at the top of the screen          System out printf    55s      WELCOME TO IDIOCY CENTRAL   n          System out printf    55s                                      n           String   codes              G22    K13    I30    S20           System out printf    5s 5s 5s 5s n   codes 0   codes 1   codes 2                codes 3          System out printf   Enter one of the above  n         String usercode   in nextLine         for  int i   0  i  lt  codes length  i                if  codes i  equals  usercode                   System out printf   What s the matter with you  n                else                 System out printf   Youda man

User · Answer

If I understand your question correctly  it appears you want to know the following      How do I check if my String array contains usercode  the String that was just inputted    See here for a similar question  It quotes solutions that have been pointed out by previous answers  I hope this helps

User · Answer

Iterate over the codes array using a loop  asking for each of the elements if it s equals   to usercode  If one element is equal  you can stop and handle that case  If none of the elements is equal to usercode  then do the appropriate to handle that case  In pseudocode   found   false foreach element in array    if element equals usercode       found   true     break  if found    print  I found it   else    print  I didn t find it

User · Answer

Right now you seem to be saying  does this array of strings equal this string   which of course it never would   Perhaps you should think about iterating through your array of strings with a loop  and checking each to see if they are equals   with the inputted string      or do I misunderstand your question

User · Answer

I presume you are wanting to check if the array contains a certain value  yes  If so  use the contains method   if Arrays asList codes  contains userCode

[java] Java, how to compare Strings with String Arrays

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