Using Color, Fonts, and Graphics - Java 6 - page 371

Line 23 creates the comp2D object used for all 2D drawing operations. It's a cast of
the Graphics object that represents the panel's visible surface.

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Lines 32-34 create a BasicStroke object that represents a line width of 2 pixels
and then makes this the current stroke with the setStroke() method of
Graphics2D .

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Lines 35-40 use two nested for loops to create waves from individual arcs.

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Lines 42-43 create a gradient fill pattern from the color green at 0, 0 to orange at
50, 50. The last argument to the constructor, true , causes the fill pattern to repeat
itself as many times as needed to fill an object.

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Line 44 sets the current gradient fill pattern using the setPaint() method and the
gp object just created.

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Lines 45-63 create the polygon shaped like the state of Florida and draw it. This
polygon is filled with a green-to-orange gradient pattern.

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Line 63 sets the current color to black. This replaces the gradient fill pattern for the
next drawing operation because colors are also fill patterns.

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Line 65 creates a new BasicStroke() object with no arguments, which defaults to
a 1-pixel line width.

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Line 66 sets the current line width to the new BasicStroke object pen2 .

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Lines 68-70 create three ellipses at 235, 140; 225, 130; and 245, 130. Each is 15
pixels wide by 15 pixels tall, making them circles.

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Figure 13.9 shows the application running.

FIGURE 13.9
The Map
application.

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