JAVA:the first output is difficult to understand

Question

[![enter image description here][1]][1]In my opinion,the first output should be "hello",but why the first output is "world" ?

    public static void main(String[] args) {
        System.out.println("hello");
        test();
    }
    public static void test() {
        System.out.println("world");
        main(null);
        System.out.println("!");
    }
   }


  [1]: https://i.stack.imgur.com/SXSHY.png

There is no image. Try copying and pasting both the code and the output as text, it works much better. — markspace, May 02 '21 at 03:27
It isn't. This program recursively prints hello and world in that order. — Elliott Frisch, May 02 '21 at 03:46
The first word printed is "hello". [See here](https://ideone.com/i14mUJ). — MC Emperor, May 03 '21 at 07:58

Spectric · Accepted Answer · 2021-05-03T13:31:23.500

1

The main method is run by default. It is run first. Inside the main method, it:

prints "hello"
calls the test() method

In the test() method, it:

prints "world"
calls the main() method

And the process repeats, resulting in a StackOverflowError.

The main method was run first, so the order of events is as so:

prints "hello"
calls the test() method
prints '"world"`
calls the main() method

Therefore it prints "hello" first.

edited May 03 '21 at 13:31

answered May 02 '21 at 03:33

Spectric

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I run this program in Eclipse, but the first output is "world",not "hello". – super_man May 03 '21 at 07:56
@super_man Either you haven't scrolled to the top of the console, or you ran the `test()` method by default. – Spectric May 03 '21 at 13:11

JAVA:the first output is difficult to understand

1 Answers1