How do I print out the value of this boolean Java

Question

I have tried a few different methods  like print boolean isLeapYear  and a few others  but I can not figure out how to get it to work  It always says that I have a missing class  boolean is primitive  does it need one   Anyways  If the isLeapYear if-else statements are wrong  I m not worried about those   I just need to figure out how to print out the value of the boolean  any help   point in the right direction is greatly appreciated     import java util Scanner   public class booleanfun          boolean isLeapYear       public static void main String   args                System out println  Enter a year to determine if it is a leap year or not              Scanner kboard   new Scanner System in           int year   kboard nextInt          public boolean isLeapYear int year          if  year   4    0          isLeapYear   false       else if   year   4    0   amp  amp   year   100    0           isLeapYear   false       else if   year   4    0   amp  amp   year   100    0   amp  amp   year   400    0           isLeapYear   true       else         isLeapYear   false   System out println isLeapYear   System out println boolean isLeapYear        return isLeapYear

User · Answer

First of all  your variable  isLeapYear  is the same name as the method  That s just bad practice   Second  you re not declaring  isLeapYear  as a variable  Java is strongly typed so you need a  boolean isLeapYear   in the beginning of your method   This call   System out println boolean isLeapYear    is just wrong  There are no declarations in method calls   Once you have declared isLeapYear to be a boolean variable  you can call  System out println isLeapYear    UPDATE  I just saw it s declared as a field  So just remove the line System out println boolean isLeapYear   You should understand that you can t call isLeapYear from the main   method  You cannot call a non static method from a static method with an instance  If you want to call it  you need to add  booleanfun myBoolFun   new booleanfun    System out println myBoolFun isLeapYear     I really suggest you use Eclipse  it will let you know of such compilation errors on the fly and its much easier to learn that way

User · Answer

public boolean isLeapYear int year        if  year   4    0           isLeapYear   false          System out println  false              else if   year   4    0   amp  amp   year   100    0            isLeapYear   false          System out println  false              else if   year   4    0   amp  amp   year   100    0   amp  amp   year   400    0            isLeapYear   true          System out println  true              else          isLeapYear   false          System out println  false              return isLeapYear

User · Answer

There are a couple of ways to address your problem  however this is probably the most straightforward   Your main method is static  so it does not have access to instance members  isLeapYear field and isLeapYear method  One approach to rectify this is to make both the field and the method static as well   static boolean isLeapYear      snip     public static boolean isLeapYear int year          snip         Lastly  you re not actually calling your isLeapYear method  which is why you re not seeing any results   Add this line after int year   kboard nextInt      isLeapYear year    That should be a start  There are some other best practices you could follow but for now just focus on getting your code to work  you can refactor later

User · Answer

System out println isLeapYear      should work just fine   Incidentally  in   else if   year   4    0   amp  amp   year   100    0       isLeapYear   false   else if   year   4    0   amp  amp   year   100    0   amp  amp   year   400    0       isLeapYear   true     the year   400 part will never be reached because if  year   4    0   amp  amp   year   100    0   amp  amp   year   400    0  is true  then  year   4    0   amp  amp   year   100    0  must have succeeded   Maybe swap those two conditions or refactor them   else if   year   4    0   amp  amp   year   100    0       isLeapYear    year   400    0

User · Answer

you should just remove the  boolean  in front of your boolean variable   Do it like this   boolean isLeapYear   true  System out println isLeapYear     or  boolean isLeapYear   true  System out println isLeapYear  yes   no      The other thing ist hat you seems not to call the method at all  The method and the variable are both not static  thus  you have to create an instance of your class first  Or you just make both static and than simply call your method directly from your maim method   Thus there are a couple of mistakes in the code  May be you shoud start with a more simple example and than rework it until it does what you want   Example   import java util Scanner   public class booleanfun          static boolean isLeapYear       public static void main String   args                System out println  Enter a year to determine if it is a leap year or not              Scanner kboard   new Scanner System in           int year   kboard nextInt            isLeapYear year             public static boolean isLeapYear int year            if  year   4    0          isLeapYear   false           else if   year   4    0   amp  amp   year   100    0            isLeapYear   false           else if   year   4    0   amp  amp   year   100    0   amp  amp   year   400    0               isLeapYear   true           else             isLeapYear   false           System out println isLeapYear            return isLeapYear

User · Answer

There are several problems   One is of style  always capitalize class names   This is a universally observed Java convention  Failing to do so confuses other programmers   Secondly  the line   System out println boolean isLeapYear     is a syntax error  Delete it   Thirdly   You never call the function from your main routine   That is why you never see any reply to the input

[java] How do I print out the value of this boolean? (Java)

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