Test them and convince yourself that they are equivalent. Which do you prefer and why? Many students will prefer the ¯rst one since it is shorter, but some may prefer the second because the steps are clearer.

Question

What will be an ideal response?

Answer 1

```
/**
* Method to inc r e a s e the amount o f red by 1.3
*/
public void inc r eas eRed2 ( )
{
Pix e l [ ] pixe lAr ray = this . g e tPi x e l s ( ) ;
int value = 0 ;
// loop through a l l the p i x e l s
for ( int i = 0 ; i < pixe lAr ray . l eng th ; i++)
f
// s e t the red v a lue to 1.3 t imes what i t was
value = pixe lAr ray [ i ] . getRed ( ) ;
pixe lAr ray [ i ] . setRed ( ( int ) ( value ¤ 1 . 3 ) ) ;
}
}
```

```
/**
* Method to inc r e a s e the amount o f red by 1.3
*/
public void inc r eas eRed3 ( )
{
Pix e l [ ] pixe lAr ray = this . g e tPi x e l s ( ) ;
Pix e l p i x e l = nul l ;
int red = 0 ;
int green = 0 ;
int blue = 0 ;
int newRed = 0 ;
// loop through a l l the p i x e l s
for ( int i = 0 ; i < pixe lAr ray . l eng th ; i++)
{
// g e t the cur r ent p i x e l
p i x e l = pixe lAr ray [ i ] ;
// g e t the c o l o r v a l u e s
red = p i x e l . getRed ( ) ;
green = p i x e l . getGreen ( ) ;
blue = p i x e l . getBlue ( ) ;
// c a l c u l a t e the new red v a lue
newRed = ( int ) ( red ¤ 1 . 3 ) ;
// s e t the p i x e l c o l o r to the new c o l o r
p i x e l . s e tCo l o r (new Color (newRed , green , blue ) ) ;
}
}
```