public, private,default,protected in case of method overriding

package oops;
class Superclass
{
 // super class default m1 method
  void m1()
  {
 System.out.println("Super class method");
  }
  //     super class private m2 method
 private void m2()
 {
     System.out.println("Super class method");
 }
 //     super class public m3 method
 public void m3()
 {
     System.out.println("Super class method");
 }
 //     super class protected m4 method
 protected void m4()
 {
     System.out.println("Super class method");
 }
}
public class Subclass extends Superclass {
//If not provide proper allowed modifiers it leads compiler error 
//cannot reduce the visibility of the inherited method from super class
    
//sub class default m1 method allowed default,public,protected    
  void m1()
  {
 System.out.println("Super class method");
  }
//sub class private m2  allowed private,default,protected,public    
 private void m2()
 {
     System.out.println("Super class method");
 }
 //super class public m3 method allowed modifiers public only
 public void m3()
 {
     System.out.println("Super class method");
 }
 //     super class protected m4 method protected,public
 protected void m4()
 {
     System.out.println("Super class method");
 }
 public static void main(String[] args) {
     Subclass  s=new Subclass();
     s.m1();
     s.m2();
     s.m3();
     s.m4();
 }

}


output:
Super class method
Super class method
Super class method
Super class method