Java Programming
CIS279
Tori Basford
tori@bly.net

Assignment(s):
CIS 279 - Homework 1, Part d

Exercise(s):

1. None.

Converting:
As with the 8 Primary data types, different things (Components, for example) can be converted. All things can be converted to Objects.

example:
Object o = new Object();
Component cp = (component) o;
Object o = (Object) cp;

Hashtable:
Hash tables contain a key (object) and a value (object) that coresponds to the key. things are stored and retrieved from the hash table via the put(key object, value object) and get(key object) methods.

example:
Hashtable ht = new Hashtable();
ht.put("Tori", "teacher");
ht.put("Pima", "8181 E. Irvington");
ht.put("CB", new ColorBar());
Object o = ht.get("Pima");
String s = (String) o;

In order to put the 8 primary data types into a hash table, use the Class for each data type to convert them to an object.

1. Boolean
2. Character
3. Byte
4. Short
5. Integer
6. Long
7. Float
8. Double

More on ColorBar:
Suppose cb is a ColorBar, and we want to find out where the SCrollBar is set. We could use the cb.jsb.getValue); method, but accessing from the outside is not a good idea. Because of this, we should set the JScrollBar to private and create a method to get the value. This should be set to getValue() and should return the value of the ColorBar's JScrollBar.

We need to be able to add a Listener of our own to the ColorBars in CBTest, but we can NOT use the cb.jsb.addAdjustmentListener(al) method because jsb is now private. So, in ColorBar a method should be made (aal(), for example) that recieves an AdjustmentListener and addes to the JScrollBar (jsb).

cb.a
cb1.aal(al);
In the ColorBar.aal, it runs the command jsb.addAdjustmentListener(al) which passes the AdjustmentListener that was given to aal().