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Thread: how to test arrays in a terminal in java?

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    Default how to test arrays in a terminal in java?

    public class OneA {
    	public int product( int [] a ) {
    		int product = 1;
    		for ( int i = 0; i < a.length; i++ ) {
    		product *= a[i];
    		}
    		return product;
    		}
    		}

    the above code should give me results like the following:
    product(new int[] {1, 2, 3, 4, 5}) -> 120
    product(new int[] {2, 3, 7}) -> 42

    i know the code is right but how do i test it in the terminal? after compiling the class i.e javac OneA.java, what should be the next command in the terminal?


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    Super Moderator Norm's Avatar
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    Default Re: how to test arrays in a terminal in java?

    After using the javac command to compile a program,
    use the java command to execute the class created by the javac command:
    java OneA
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: how to test arrays in a terminal in java?

    If i just type java OneA i get the following error: Exception in thread "main" java.lang.NoSuchMethodError: main

    I know it's java OneA but after that what should be written so that it can give me the product of say 2 3 and 4.

    Like if i have a java program Add.java and i have 2 arguments defined so at the terminal i would say javac Add.java and then java Add 2 3 which will give me 5

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    Default Re: how to test arrays in a terminal in java?

    Take a look at the tutorial about how to write a java program and execute it:
    "Hello World!" for Microsoft Windows (The Java™ Tutorials > Getting Started > The "Hello World!" Application)
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: how to test arrays in a terminal in java?

    about the link Norm provided..i know that...i need the explanation to "test" "arrays" in a terminal.

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    Default Re: how to test arrays in a terminal in java?

    Please explain what you mean by "test arrays".


    java.lang.NoSuchMethodError: main
    A class must have a main() method to be executed using the java command.
    The link provided in post#4 shows how to code a main() method.
    If you don't understand my answer, don't ignore it, ask a question.

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