unable to run program on terminal..

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I created this very simple code to start learning how to program. When I went onto my terminal I first went into the correct directry, and then typed javac Calc.java. the class and java class are both present in the folder. I tried to run it after that by typing, java Calc. But I got this error (

XML

Exception in thread "main" java.lang.NoSuchMethodError: main) What could I be doing wrong here?

public class Calc {

    public void brown ()
    {
        int a = 0;
        int b = 0;
        a++;
        b--;
        System.out.println(a);
        System.out.println(b);
    }
}

Posted 1-Apr-13 10:34am

helloworld..s

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**Zoltán Zörgő** · Accepted Answer · 2013-04-01T10:39:00

Solution 1

The message is simple: you can not start an application that has no entry point. See the most used demo:

Java

public class HelloWorld {
    public static void main(String[] args) {
        System.out.println("Hello, World");
    }
}

Do you see the difference? This will run, since it has a public static void main(String[] args) signed method. Do like this. Of course, you can have other methods too.

Posted 1-Apr-13 10:39am

Zoltán Zörgő

Comments

Sergey Alexandrovich Kryukov 1-Apr-13 16:40pm

My 5. We answered almost at the same time. :-)
—SA

Zoltán Zörgő 1-Apr-13 16:41pm

Yes :)

helloworld..s 1-Apr-13 16:41pm

thanks!

Sergey Alexandrovich Kryukov · Accepted Answer · 2013-04-01T10:39:00

Solution 2

This type of application needs an entry point method, "main". As I can understand from your exception message, it is missing. Please, for example, use these directions:
http://www.cs.utexas.edu/~mitra/cwinstr.html[^].

To get some background on the topic, please see: http://en.wikipedia.org/wiki/Main_function#Java[^].

—SA

Posted 1-Apr-13 10:39am

Sergey Alexandrovich Kryukov

Comments

helloworld..s 1-Apr-13 16:41pm

Thank you!

Sergey Alexandrovich Kryukov 1-Apr-13 16:42pm

You are welcome.
Good luck, call again.
—SA

Zoltán Zörgő 1-Apr-13 16:41pm

Of course, it is also a 5!

Sergey Alexandrovich Kryukov 1-Apr-13 16:43pm

Thank you, Zoltán.
—SA

unable to run program on terminal..

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unable to run program on terminal..

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