Calling a method from within the same class

I am new to the java programming language. This code is free of errors in Eclipse, what I am wondering is how to call the findOdds medhod from the main method. The findOdds method should return a list. I know in Python you could set it equal to a variable such as x = findOdds(100), I am just not sure how to do this in Java. Any help would be appreciated. Thanks.

Code:

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import java.util.ArrayList;

public class TestVoidMethod {
        public static void main(String args[]){
                System.out.println("Hello World");
        }
        public ArrayList<Integer> findOdds(int number){
                ArrayList<Integer> odds = new ArrayList<Integer>();
                for(int i = 3; i < number + 1; i += 2){
                        odds.add(i);
                }
                System.out.println(odds);
                return(odds);
        }
       
}

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What happened when you tried?

Note that you have to create an instance of a class before you can call its non-static methods.

All it does is print out the Hello World, I would like to put a statement below the Hello World line and call the findOdds method. Would something like findOdds newvar = new findOdds(100); work? The error I get when trying newvar is:

Multiple markers at this line
- findOdds cannot be resolved to a type

That's because findOdds is a method, not a type, so it really doesn't make sense to use "new" with it. The findOdds() method belongs to the type TestVoidMethod.

Recommended reading: Lesson: Classes and Objects (The Java™ Tutorials > Learning the Java Language)

Quote:

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Originally Posted by gregpuzzles1

Would something like findOdds newvar = new findOdds(100); work?

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You just made that up didn't you? Programming, not jut in Java but any programming language, is not throwing a couple of keywords and method names, sprinkled with a few interesting looking parentheses together and hope for the best. Google for "Java Tutorials" (or click the link supplied by Kevin) and read them carefully; better yet: study them.

kind regards,

Jos

Yes I did pretty much just make that up. :(giggle):(LOL) It appears that making an object out of the main class and then referencing that object with the method name will work:

Code:

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TestVoidMethod method = new TestVoidMethod();
System.out.println(method.findOdds(100));

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Quote:

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Originally Posted by JosAH

You just made that up didn't you? Programming, not jut in Java but any programming language, is not throwing a couple of keywords and method names, sprinkled with a few interesting looking parentheses together and hope for the best.

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Unless you're talking about lisp...

Quote:

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Originally Posted by KevinWorkman

Unless you're talking about lisp...

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Lisp? Lisp? Kid stuff! You obviously have never seen Forth! Now that is a programming language for real men (like me)! ;-)

kind regards,

Jos