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public class Hello2030 {
    public static void main(String[] args) {
        System.out.println("메인코딩!!");
    }
}

Compilation error #stdin compilation error #stdout 0.04s 711168KB

stdin

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Standard input is empty

compilation info

Main.java:1: error: class Hello2030 is public, should be declared in a file named Hello2030.java
public class Hello2030 {
       ^
1 error

stdout

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Standard output is empty

https://ideone.com/r8OlOF

language:

Java (12.0.1)

created:

visibility:

public

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