Java - Check if input is a positive integer negative integer natural number and so on

Question

Is there any in-built method in Java where you can find the user input s type whether it is positive  or negative and so on  The code below doesn t work  I am trying to find a way to input any in-built method that can do it at the if statement    import java util Scanner   public class Compare        public static void main String   args              Scanner input   new Scanner System in            System out print  Enter a number              int number   input nextInt             if number    int               System out println  Number is natural and positive

User · Answer

You could use if number  gt   0   The fact that you use int number   input nextInt    makes sure that it has to be an Integer

User · Answer

For integers you can use Integer signum       Returns the signum function of the specified int value   The return value is -1 if the specified value is negative  0 if the   specified value is zero  and 1 if the specified value is positive

User · Answer

If you really have to avoid operators then use Math signum       Returns the signum function of the argument  zero if the argument is   zero  1 0 if the argument is greater than zero  -1 0 if the argument   is less than zero    EDIT   As per the comments  this works for only double and float values  For integer values you can use the method   Integer signum int i

User · Answer

What about using the following   int number   input nextInt    if  number  lt  0           negative   else         it s a positive

User · Answer

Use like below code   if number  gt  0                 System out println  Number is natural and positive

User · Answer

You should you as Else-If statement to check the for the three different state  positive  negative  0   Here is a simple example  excludes the possibility of non-integer values     import java util Scanner     public class Compare       public static void main String   args          Scanner input   new Scanner System in        System out print  Enter a number          int number   input nextInt         if  number    0        System out println  Number is equal to zero          else if  number  gt  0        System out println  Number is positive          else        System out println  Number is negative

[java] Java - Check if input is a positive integer, negative integer, natural number and so on.

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