Pre-quiz 1-Spring 2007
Pre-Quiz1(Spring 2007)
Q1. Who's your grading TA?(Please circle your answer)
Ricardo Brian Mark Rory Derek Sarah Kristin REMOVEDel
Q2. True or False
Answer the following questions by circling either True or False.
1. Java is not case-sensitive
(ie...Pixel and pixel are considered the same thing) ________True________False
2. int means "integer" and cannot store decimal values ________True________False
Q2. Below is the negate method in the class Picture:
/**
*Method to negate the picture*/
public void negate()
{
Pixel pixel = null;
// get the array of pixels
Pixel[] pixels = this.getPixels();
// loop through all the pixels
for (int i = 0; i < pixels.length; i++)
{
// get the current pixel
pixel = pixels[i];
// set the pixel color values to the new values
pixel.setRed(255 - pixel.getRed());
pixel.setGreen(255 - pixel.getGreen());
pixel.setBlue(255 - pixel.getBlue());
}
}
Recall that creating a grayscale version of a picture is done by setting the red, green, and blue all to the same value.
A good value to use is the average of the red, green, and blue pixel values.
*Rewrite this method as a grayscale() method.* And be sure to use a while loop in your solution.
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