Why is the java class not compiling?

class MathFun

{

private double far = ((double)5/9); // (5/9)

private double cel = ((double)9/5); // (9/5)

private double PI = Math.PI(); // (pi)

private double vol = ((double)4/3); // (4/3)

public MathFun ( ) { }



double fToC (double F)

{

double celsius = 5 * (F - 32) / 9;

return celsius;

}



double cToF (double C)

{

double fahrenheit = 9 * (C + 32) / 5;

return fahrenheit;

}



double calcSphere (double r)

{

double vol = 4/3;

double PI = Math.PI;

double sqr = Math.pow(r,3);

double volume = vol * PI * sqr;

return volume;

}





its saying that PI is not a variable, how do i change it in order to work.Why is the java class not compiling?
Whenever you want to use the pi value simply write Math.PI:



class MathFun

{

聽聽private double far = ((double)5/9); // (5/9)

聽聽private double cel = ((double)9/5); // (9/5)

聽聽private double vol = ((double)4/3); // (4/3)



聽聽public MathFun ( ) { }



聽聽double fToC (double F)

聽聽{

聽聽聽聽double celsius = 5 * (F - 32) / 9;

聽聽聽聽return celsius;

聽聽}



聽聽double cToF (double C)

聽聽{

聽聽聽聽double fahrenheit = 9 * (C + 32) / 5;

聽聽聽聽return fahrenheit;

聽聽}



聽聽double calcSphere (double r)

聽聽{

聽聽聽聽double vol = 4/3;

聽聽聽聽double sqr = Math.pow(r,3);

聽聽聽聽double volume = vol * Math.PI * sqr;

聽聽聽聽return volume;

聽聽}

}



RegardsWhy is the java class not compiling?
YAY! You've got:



Math.Pi() -- As a function in Line 5



Math.PI -- As a value in Line 24



Check the Java doc. One of those should not be right.