how to use math pi in java

Question

I am having problems converting this formula V   4 3 p r 3  I used Math PI and Math pow  but I get this error          expected   Also  the diameter variable doesn t work  Is there an error there   import java util Scanner   import javax swing JOptionPane   public class NumericTypes           public static void main  String    args                double radius          double volume          double diameter           diameter   JOptionPane showInputDialog  enter the diameter of a sphere              radius   diameter   2           volume    4   3  Math PI   Math pow radius  3            JOptionPane showMessageDialog  The radius for the sphere is    radius    and the volume of the sphere is

User · Answer

Replace   volume    4   3  Math PI   Math pow radius  3     With   volume    4   Math PI   Math pow radius  3     3

User · Answer

Here is usage of Math PI to find circumference of circle and Area First we take Radius as a string in Message Box and convert it into integer  public class circle        public static void main String   args               TODO code application logic here          String rad           float radius area circum          rad   JOptionPane showInputDialog  Enter the Radius of circle              radius   Integer parseInt rad           area    float   Math PI radius radius           circum    float   2 Math PI radius            JOptionPane showMessageDialog null   Area      area  AREA  JOptionPane INFORMATION MESSAGE           JOptionPane showMessageDialog null   circumference      circum   Circumfernce  JOptionPane INFORMATION MESSAGE

User · Answer

You re missing the multiplication operator  Also  you want to do 4 3 in floating point  not integer math   volume    4 0   3    Math PI   Math pow radius  3

User · Answer

Your diameter variable won t work because you re trying to store a String into a variable that will only accept a double  In order for it to work you will need to parse it  Ex    diameter   Double parseDouble JOptionPane showInputDialog  enter the diameter of a sphere

[java] how to use math.pi in java

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