Automatic type conversion in method overloading

class Demo{
    void test(){
        System.out.println("No parameter");
    }
    void test(int a, int b){
        System.out.println("a and b is: " + a +" "+b);
    }
    void test(double a){
        System.out.println("a is: " + a);
    }
}
public class Main{
    public static void main(String args[]){
        Demo dm = new Demo();
        dm.test();
        dm.test(7,5);
        dm.test(3.5);
        dm.test(4); //type conversion happened here
    }
}