Changing button color

Question

hi,
i am writing an applet and i have many buttons. when you click on a button i want to check what color it currently is and change it appropiatly.
i have hit a brick wall. i can set the color no probs with;
onea.setBackGround(red);
but how would you go about comparing onea's color with my two colors red and green?
thanks

Answer 1

Is this a project for school?
Anyway, you could get the RGB int values and compare them one by one...Like
int currentRed = someColor.getRed();
int currentGreen = someColor.getGreen();
int currentBlue = someColor.getBlue();
int anotherRed = anotherColor.getRed();
int anotherGreen = anotherColor.getGreen();
int anottherBlue = anotherColor.getBlue();
// now compare the two colors
if ( currentRed == anotherRed &&
currentGreen == anotherGreen &&
currentBlue == anotherBlue )
// if we get here then the two Colors are equivalent
A more professional solution would be to create a custom Comparator by implementing the Comparator interface. From there you could manually call compare( currentColor, anotherColor );
Also, with a custom Comparator you could store multiple Color objects in a List and then use the Arrays class with the Comparator to perform sorting and lookup.
For simplicity sake, just create a convenience method to check two colors of your choosing. Like:
public int myColorComparingMethod( Color colorA, Color colorB )
// compare here and return an int based upon order
Eric
P.S. - you should offer Duke Dollars when you post, it will encourage more people to offer responses to your questions.