Greenfoot

joeenglish wrote ...

2015/12/31

Hello World Java Application

joeenglish

2015/12/31

Hi, can anyone tell me how I can use Greenfoot to write/run the code below. Any help would be appreciated.

class HelloWorldApp {
    public static void main(String[] args) {
        System.out.println("Hello World!"); // Display the string.
    }
}

danpost

2015/12/31

Greenfoot supplies a 'main' method to your project and you cannot have two in the same application. Change line 2 to this:

public HelloWorldApp() {

and create a subclass of World that creates a HelloWorldApp object:

public class MyWorld extends greenfoot.World {
    public MyWorld()
    {
        super(0, 0, 0);
        new HelloWorldApp();
    }
}

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