generic class using enum?

[kaijanm]

I'm relatively new to Java and I'm trying to refactor some code I wrote to make it more generic.

I currently have several classes that are basically exactly the same except they each have a different enum. For instance, I have an A class that stores values for AData1, AData2, AData3. I also have a B class that stores values for BData1 and BData2. I have an enum of AData1, AData2, AData3 and another enum of BData1 and BData2.

The classes have essentially the same methods, but the only difference is their enum.

I was hoping to create a generic class and then simply pass in the enum to a constructor on an instance. I'm thinking I can use an EnumMap to store the values I need. I can't figure out how to pass in an entire enum to a function. I can pass in one value from the enum, but not the entire thing. Any ideas?

 

[stefanwagner]

I don't know how to avoid -Xlint:unchecked warnings, but this compiles and runs - maybe it helps?

 import java.util.*;
	
enum Ad1 
{
	foo, bar, foobar;
}

enum Ad2 
{
	foofoo, barbar;
}

enum Bd1 
{
	f, b, fb;
}

class Store <E extends Enum <E>>
{
	private EnumMap <E, String> em;
		
	public Store (EnumMap <E, String> em) 
	{
		this.em = em;
	}
	
	public void put (E e, String v)
	{
		em.put (e, v);
	}
	
	public void show () 
	{
		for (Map.Entry<E, String> entry : em.entrySet ()) 
		{
			System.out.println ("Map entry: " + entry);
		}
	}
}

public class ABstore  <E extends Enum <E>>
{
	public static void main (String [] args) 
	{
		EnumMap ma1 = new EnumMap (Ad1.foo.getClass ());
		EnumMap <Ad2, String> ma2 = new EnumMap (Ad2.foofoo.getClass ());
		EnumMap <Bd1, String> mb1 = new EnumMap (Bd1.f.getClass ());
		Store <Ad1> a1s = new Store <Ad1> (ma1);
		Store <Ad2> a2s = new Store <Ad2> (ma2);
		Store <Bd1> b1s = new Store <Bd1> (mb1);
		
		a1s.put (Ad1.foo, "7");
		a1s.put (Ad1.bar, "9");
		a1s.put (Ad1.foo, "3");

		a2s.put (Ad2.foofoo, "foofoo");
		a2s.put (Ad2.barbar, "barbar");
		a2s.put (Ad2.barbar, "barefoot");
		
		b1s.put (Bd1.f, " f ");
		b1s.put (Bd1.b, " b ");
		b1s.put (Bd1.fb," fb ");
		
		a1s.show ();
		a2s.show ();
		b1s.show ();		
	}
}

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[kaijanm]

I'm going to play with this a bit, and then I'll likely have more questions! Thanks!