java 变量未初始化

Question

I have the following code which outputs 0 and 5 when run the first time. However, if I rerun the program I get 5 and 5 from BlueJ (ide) and 0 and 5 from coding roooms (ide). Is this a bug in BlueJ?

UPDATE: spoke to the BlueJ support team. BlueJ has an extension called "Run Main Method" that is causing the problem. If you use void main(String[] args) the program runs as intended

here's the code:

public class Bug
{
    private static int x = 0;
    
    public static void main(String[] args){
        System.out.println("\f");
        
        System.out.println(x);
        x=5;
        System.out.println(x);
    }
}

Answer 1

Yes, this is probably a bug in BlueJ as both in Eclipse and IntelliJ the output is

0
5

In any case the above should be the correct output in any IDE as per the rules of the Java language

Answer 2

Yes, That is a problem with BlueJ.

---

You don't have to put the String[] args in BlueJ. It still works.