public class TreeDemo
1: //TreeDemo.java
2:
3: /**
4: A program that draws a fir tree composed of a triangle and
5: a rectangle, both drawn using keyboard characters.
6: */
7: public class TreeDemo
8: {
9: public static final int INDENT = 5;
10: public static final int TREE_TOP_WIDTH = 21;// must be odd
11: public static final int TREE_BOTTOM_WIDTH = 4;
12: public static final int TREE_BOTTOM_HEIGHT = 4;
13:
14: public static void main(String[] args)
15: {
16: drawTree(TREE_TOP_WIDTH, TREE_BOTTOM_WIDTH, TREE_BOTTOM_HEIGHT);
17: }
18:
19: public static void drawTree(int topWidth, int bottomWidth, int bottomHeight)
20: {
21: System.out.println(" Save the Redwoods!");
22: TriangleInterface treeTop = new Triangle(INDENT, topWidth);
23: drawTop(treeTop);
24:
25: RectangleInterface treeTrunk =
26: new Rectangle(INDENT + (topWidth / 2) - (bottomWidth / 2),
27: bottomHeight, bottomWidth);
28: drawTrunk(treeTrunk);
29: }
30:
31: private static void drawTop(TriangleInterface treeTop)
32: {
33: treeTop.drawAt(1);
34: }
35:
36: private static void drawTrunk(RectangleInterface treeTrunk)
37: {
38: treeTrunk.drawHere(); // or treeTrunk.drawAt(0);
39: }
40: }