Answer 1

public class Program
{

public static class Test {

private String function()
{
return ("Man United");
}
public final static String function (int data)
{
return ("Man City");
}

} //end of Test class

public static void main (String[]args)
{
Test obj= new Test();
System.out.println (obj.function ());
}
}

Answer 2

you didn't define any class named Test and you are creating object from it. Test obj = new Test() ;

Answer 3

try to define the object named test first before using an object of the same