java的编程出现错误，请大家帮帮忙，谢谢！

import java.util.Scanner;

/*
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/**
*
* @author Jack ONE
*/
public class mainClass {
System.out.println("你好！");

}
提示

请肢誉悔雹写在main函数里。。。

public static void main(String[] args) <-----这历前段才是main函数

public class mainClass {
public static void main(String args[]){
System.out.println("让友你好！坦蚂槐"物带);
}
}