static nested class using inner main,outer main method

package innerclass;


    public class Test
        {
            static class Inner
            {
            public void m1()
            {
            System.out.println("hai");
            }
            public static void main(String att[])
            {
                Inner i=new Inner();
                i.m1();
                System.out.println("inner main");
            }
            }
            public static void main(String art[])
            {
                Test.Inner in =new Test.Inner();
                in.m1(); 
                System.out.println("outer main");
            }
            
        }
    
here we can run by using outer class main and inner class main
    output:
run by using outer class main: java Test$1:
hai
outer main
run by using outer class main: java Test$Inner:
hai 
inner main