Thread: What's the bug in this code?

I'm sure it's something really simple that I'm missing, but after spending a long while going over it, I can't figure out what's wrong. It looks like it should work:

public class HW {
 
 
 
            public static void main(String args[])
 
             {
 
                        System.out.println("\nEx0811.JAVA\n");
 
                        double num1 = 200;
 
                        double num2 = 100;
 
                        Calc.add(num1,num2);
 
                        Calc.subtract(num1,num2);
 
                        System.out.println();
 
            }
 
 
 
}
 
 
 
class Calc
 
{
 
            public static void add(double a, double b);                     
            	{   
            		System.out.println(a + b);
            		   }
 
 
 
            public static void subtract(double a, double b); 
            	{   
            		System.out.println(a - b);   
            			 }
 
}

It is supposed to display the sum and difference of num1 and num2. But instead, I get these 6 errors:


#
C:\HW.java:35: error: missing method body, or declare abstract
public static void add(double a, double b);
^
C:\HW.java:37: error: cannot find symbol
System.out.println(a + b);
^
symbol: variable a
location: class Calc
C:\HW.java:37: error: cannot find symbol
System.out.println(a + b);
^
symbol: variable b
location: class Calc
C:\HW.java:42: error: missing method body, or declare abstract
public static void subtract(double a, double b);
^
C:\HW.java:44: error: cannot find symbol
System.out.println(a - b);
^
symbol: variable a
location: class Calc
C:\HW.java:44: error: cannot find symbol
System.out.println(a - b);
^
symbol: variable b
location: class Calc
6 errors

Process completed.


Can someone explain what's wrong to me? Any help greatly appreciated.

a semicolon is used to terminate a statement in the code, its like a comma or period when you are writing phrases or sentences in an essay, its like telling the compiler "ok i've had enough telling what i need on that phrase", look at your methods, methods are kind of structures that has statements/or statements inside of it, it should not have a semi colons, you only use it if you plan to write abstract classes, well in your case its not.

Aaaah, yes, thankyou, I figured it out literally just before checking back here. There are semicolons at the ends of the methods in the Calc class. I gotta watch out for that, thankyou for your help, too

dont consider it an error, its also a valid statement, unfortunately not in your case, dont forget about abstract classes

I'll keep that in mind. Thanks once again.