Urgent, Java experts help me!

2007-05-10 05:39:41

#1

Ayumiz: J-10 whore; +103|7348|Singapore

I got a couple of java homeworks i need help with, like helping me spot the error with the code.

Code:

public class SphereVolume 
{
    public static void main (String[] args);
            
        System.out.println ("Volume: " + volume + " cubic cm");
        
        radius = scn.nextDouble();     
        
        final double PI = 3.14159;
        
        volume = PI * radius * radius * radius ;

        System.out.print ("Enter radius(cm) of circle: ");
        
          Scanner scn = new Scanner(System.in);
          
            int radius;  
 
        int volume;    
 
    }

Whats the error here?

Code:

import java.util.Scanner;

public class Face
{
  public static void main(String[] args)
  {
     // declare variables
      String Peter;
      
          
     Scanner scn = new Scanner(System.in);
      System.out.print("Enter your name : ");
      Peter = scn.nextString();
         
          
     System.out.println("  //////////");
      System.out.println(" |  o   o  |");
      System.out.println("(|    ^    |)");
      System.out.println(" |  \\_/  |");
      System.out.println("  --------- ");
      System.out.println("Hello, I am Peter! How are you?");
  }
}

Any error here?

Last edited by Ayumiz (2007-05-10 06:26:21)

2007-05-10 05:45:26

#2

jsnipy: ...; +3,277|7137|...

int radius;

int volume;

are declared after you are referencing them

2007-05-10 06:12:58

#3

Ayumiz: J-10 whore; +103|7348|Singapore

uhh so i must declare them before system println right?

2007-05-10 06:13:39

#4

jsnipy: ...; +3,277|7137|...

Ayumiz wrote:
uhh so i must declare them before system println right?

yes

2007-05-10 06:41:20

#5

Ayumiz: J-10 whore; +103|7348|Singapore

Ok edit: Whats wrong with the second code?

2007-05-10 06:48:44

#6

jsnipy: ...; +3,277|7137|...

Assuming u are trying to take the name form the user ... you variable name is Peter ... which is taking the value from the user input.

Code:

// What you have
System.out.println("Hello, I am Peter! How are you?");

// Try this
System.out.println("Hello, I am " + Peter + " ! How are you?");

Perhaps use a different variable name to avoid confusion

Last edited by jsnipy (2007-05-10 06:49:17)

2007-05-10 06:50:08

#7

Ayumiz: J-10 whore; +103|7348|Singapore

uh okay, i'll try that out, theres some error with the first code,

I have edited it countless times

Code:

import java.util.Scanner;
public class Sphere 
{
    public static void main (String[] args);
     {
     
     
         //declare variables
          int radius;
          int volume;
          final double PI = 3.14159;  
 
         
          
          // read input data
          Scanner scn = new Scanner(System.in);
          volume = PI * radius * radius * radius;

          
            
 
            
        System.out.println ("Volume: " + volume +  "cubic cm");
                    radius = scn.nextDouble();
          System.out.print ("Enter radius(cm) of circle: ");
          }
          
          
}

The error message shown on my compiler is this,

Sphere.java:51: 'class' or 'interface' expected
}
^
Sphere.java:52: 'class' or 'interface' expected
^
2 errors

2007-05-10 06:54:27

#8

vpyroman: Aeon Supreme commander; +16|7231|UCF

Its been a semester, but

public static void main (String[] args);

seems to be highly illegal.

No ";" on the end of that line.

System.out.println ("Volume: " + volume + "cubic cm");
radius = scn.nextDouble();

You're also reading in a double value into an int
its just easier to recode everything

import java.util.Scanner;
public class Sphere
{
public static final double PI = 3.14159;
public static void main (String[] args) //edited here
{

//declare variables
double radius; //Edited here
double volume; //edited here
Scanner scn = new Scanner(System.in);

// read input data
System.out.print ("Enter radius(cm) of circle: ");
radius = scn.nextDouble(); //Edited here

volume = PI * radius * radius * radius;
System.out.println ("Volume: " + volume + "cubic cm");

}

}

Also, constants shouldn't be declared in a method
:Example:

public class bmi {
public static final double FOOT_TO_METER = 0.3048;
public static final double POUND_To_KILO = 0.45359237;
public static void main(String[] args) {}
}

And for the 2nd method:

Peter = scn.nextString();

should be

Peter = scn.readLine();

Last edited by vpyroman (2007-05-10 07:09:13)

2007-05-10 06:57:56

#9

Ayumiz: J-10 whore; +103|7348|Singapore

hmm done editing but still 2 errors though.

2007-05-10 07:12:17

#10

vpyroman: Aeon Supreme commander; +16|7231|UCF

Also, you're sig should be changed because its missing a ]

[img]http://img112.imageshack.us/img112/6987/ellokh9.gif[/img <---- Right here, a missing ]

2007-05-10 07:49:31

#11

Ayumiz: J-10 whore; +103|7348|Singapore

heya thanks. my code worked out

BF2S Forums Urgent, Java experts help me!

Code:

Code:

Ayumiz wrote:

Code:

Code:

Board footer