HashMap with enums

[Bharath Kumar Alapati]

Hi,
i'm working with jdk1.6.
i'm having 2 enums as below:
public enum c1 {
a(1,2,3),
b(1,2,3),
c(1,2,3);
...
}

public enum c2{
A,
B,
C;
...
}

now from test class i want to create a hashmap with key from enum c1, value from enum c2.

Please help me:
my peice of code is:
public class test {
HashMap<c1, c2> mapping = new HashMap<c1, c2>();
mapping.put(c1.a, c2.A);
mapping.put(c1.b, c2.B);
mapping.put(c1.c, c2.C);
}
this is not working...
any ideas how to make this work...

[Mark Vedder]

You are trying to put things in the map outside a method declaration or initializer block. Move your calls to mapping.put() into a method:

public class test
{
    Map<c1, c2> mapping = new HashMap<c1, c2>();
 
    public test()
    {
        initMap();
    }
 
    private void initMap()
    {
        mapping.put(c1.a, c2.A);
        mapping.put(c1.b, c2.B);
        mapping.put(c1.c, c2.C);
    }
}

[ August 14, 2008: Message edited by: Mark Vedder ]

[Rob Spoor]

You may want to change from HashMap to EnumMap. That class has been built especially for enumerations. It uses the enum ordinals for lookups instead of the hash codes.