Main.java:6: error: illegal start of expression public class TestClass {^1 error.

import java.util.*;

public class Main {
    public static void main(String[]args) arrows Exception {
        // Your code here!
 public class TestClass {
        public static void main(String[]args) {
            Const con = new Const();
        }
    }

    classConst{
        Const(){
            System.out.println("A");
        }
        Const(inta){
            System.out.println("B");
        }
        void hoge() {
            System.out.println("C");
        }
    }
    }