public class TreeDemo
1: //TreeeDemo.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,
20: int bottomWidth,
21: int bottomHeight)
22: {
23: System.out.println(" Save the Redwoods!");
24: TriangleInterface treeTop = new Triangle(INDENT, topWidth);
25: drawTop(treeTop);
26:
27: RectangleInterface treeTrunk =
28: new Rectangle(INDENT + (topWidth / 2) - (bottomWidth / 2),
29: bottomHeight, bottomWidth);
30: drawTrunk(treeTrunk);
31: }
32:
33: private static void drawTop(TriangleInterface treeTop)
34: {
35: treeTop.drawAt(1);
36: }
37:
38: private static void drawTrunk(RectangleInterface treeTrunk)
39: {
40: treeTrunk.drawHere(); // or treeTrunk.drawAt(0);
41: }
42: }
43: