Programming in Java

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Programming in Java

Week 2: Chapter Exercises

Chapter 4: Even Only 

How does a programmer typically get access to a Graphics object when coding an applet?

In an applet, the paint method is called automatically even if the programmer does not code the method call.

What can be stated about the line drawn by the following code?

g.drawLine (100,200,300,200)

What do the arguments 100,200 represent in the following statement?

g.drawRect (10, 20,100,200)

In RGB format, gray color can be coded as A A A where the first A represents the amount of red in the color, the second A the amount of green, and the third A the amount of blue. A can vary from 0 to 255, including both 0 to 255; how many possible gray colors can we have?

What is the length of the line being drawn?

g.drawLine (50, 20, 50,350)

What is the (x, y) coordinate of the upper-right corner of the rectangle being drawn?

g.fillRect (10, 20,250,350)

This code sets the current color to red.

This code draws a filled rectangle with a width of 100 pixels and a height of 300 pixels, starting at the coordinate (50, 30).

This code draws a circle of radius 100 with its center located at (200,200).

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