1. Java @Ch15. Graphics 2011.04.01

2. Outline Graphical Coodinate Systems The Graphics Class Drawing Strings, Lines, Rectangles, and Ovals Drawing Polygons and Polylines [Sample code] TestPaintComponent.java DrawPolyLine.java

3. Graphical Coodinate Systems (0,0) at the upper-left corner

4. The Graphics Class Java.awt.Graphics +setColor(color: Color): void +setFont(font: Font): void +drawString(s: String, x: int, y:int): void +drawLine(x1,:int, y1:int, x2:int, y2:int): void +drawRect(x:int, y:int, w:int, h:int): void +fillRect(x:int, y:int, w:int, h:int): void +drawRoundRect(x:int, y:int, w:int, h:int, aw:int, ah:int): void +fillRoundRect(x:int, y:int, w:int, h:int, aw:int, ah:int): void +draw3DRect(x:int, y:int, w:int, h:int, raised:boolean): void +fill3DRect(x:int, y:int, w:int, h:int, raised:boolean): void 課本 P.523

5. Drawing Strings, Lines, Rectangles, and Ovals drawString(String s, int x, int y) method drawLine(int x1, int y1, int x2, int y2) method

6. 程式範例 :  TestPaintComponent.java 課本 P.524 Liting 15.1

7. drawRec(intx, int y, int w, int h) method fillRec(intx, int y, int w, int h) method

8. drawRoundRect(x, y, w, h, aw, ah) method drawOval(x, y,w, h) method

9. Drawing Arcs drawArc(int x, int y, int w, int h, int startAngle, int arcAngle) fillArc(int x, int y, int w, int h, int startAngle, int arcAngle)

10. 範例練習 :  DrawArcs.java 課本 P.530 Liting 15.4

11. 程式練習 : 1. 用 g.drawOval() 畫臉 2. fillOval() 畫眼睛 3.setColor() 設定畫筆顏色 4. drawArc() 畫嘴巴 ( 需 import java.awt.Color)

12. Drawing Polygons and Polylines Java.awt.Polygon +xpoints: int [] +ypoints: int [] +nponits: int [] +Polygon() +Polygon(xpoints: int [], ypoints: int [], npoints: int []) +addPoints(x: int, y: int) 課本 P.532

13. 程式範例 :  DrawPolyLine.java