Image Java Foundation Classes (JFC) java.awt.image JFC. Image. Image. Image PNG GIF JPEG

Transcription

1 : Font bit bit 2 9 Graphics Image Java Foundation Classes (JFC) java.awt.image JFC Image Image PNGGIF JPEG Image GUI ( ) Image Image static final int SCALE DEFAULT static final int SCALE FAST static final int SCALE SMOOTH Graphics getgraphics() int getheight(imageobserver o) int getwidth(imageobserver o) 1 9 ( )

2 Image getscaledinstance (int w, int h, int hints) hints w h Image Graphics Graphics 3 void drawimage(image im, int x, int y, ImageObserver o) void drawimage(image im, int x, int y, int w, int h, ImageObserver o) void drawimage(image im, int dx1, int dy1, int dx2, int dy2, int sx1, int sy1, int sx2, int sy2, ImageObserver o) im (x, y) im (x, y) w h (dx1, dy1) (dx2, dy2) im (sx1, sy1) (dx1, dy1) (sx2, sy2) (dx2, dy2) ( / ) ImageObserver drawimage ImageObserver java.awt.image ImageObserver 4 JFC GUI (JComponent 5 ) ImageObserver paintcomponent drawimage this null 11.2 Image 2 ImageIcon javax.swing.imageicon Swing GUI Swing 3 3 o im (java.awt.color ) 4 5 Swing 11 2

3 javax.swing.icon ImageIcon 6 ImageIcon URL ImageIcon Image getimage Image ImageIcon ImageIcon(String file) ImageIcon(java.net.URL url) file url URL Image getimage() Image int getimageloadstatus() void painticon(component 7 c, Graphics g, int x, int y) void setimageobserver (ImageObserver o) g (x, y) ImageObserver c ImageObserver o ImageIcon PNGGIF JPEG getimage Image ImageObserver getimageloadstatus java.awt.mediatracker 3 MediaTracker 8 static final int ABORTED static final int ERRORED static final int COMPLETE G1101Card.java Card G1101Card 6 ImageIcon 6 Icon 7 JComponent Swing AWT JFC GUI ImageObserver Component 8 3 static final int LOADING ImageIcon getimageloadstatus 11 3

4 card.png Image img paintcomponent (21 ) getwidth getheight GUI int 9 G1101Card.java 1 import java.awt.*; 2 import javax.swing.imageicon; 3 import jp.ac.ryukoku.math.graphics.*; 4 5 class G1101Card extends Card { 6 static Image img = new ImageIcon("card.png").getImage(); 7 8 G1101Card() { 9 super(); 10 } G1101Card(Suit suit, Rank rank) { 13 super(suit, rank); 14 } protected void paintcomponent(graphics g) { 17 if (isfacedup()) { 18 super.paintcomponent(g); 19 return; 20 } 21 g.drawimage(img, 0, 0, getwidth(), getheight(), null); 22 } public static void main(string[] args) { 25 GameFrame f = new GameFrame(); 26 f.add(new G1101Card()); 27 } 28 } card.png PNG ImageIO javax.imageio.imageio read read BufferedImage Image ImageIO static BufferedImage file read(java.io.file file) BufferedImage GUI

5 static BufferedImage read(java.net.url url) url URL BufferedImage ImageIO read G1101Card.java PNGGIF JPEG Windows BMP ImageIO G1101Card.java 1 import java.awt.*; 2 import java.io.*; 3 import javax.imageio.imageio; 4 import jp.ac.ryukoku.math.graphics.*; 5 6 class G1101Card extends Card { 7 static final String imgfile = "card.png"; 8 static Image img; 9 10 /* */ 11 static { 12 try { 13 img = ImageIO.read(new File(imgFile)); 14 } catch (IOException e) { 15 System.err.println(e.getMessage()); 16 System.err.println(" " 17 + imgfile + " "); 18 System.exit(1); 19 } 20 } ImageIO G1101Card.java static { } 1 13 ImageIO read java.io.file img new File( ) File read java.io.ioexception try card.png 10 File 11 5

6 $ java G1101Card Can t read input file! card.png (exceptions) Java java.lang.throwable (throw) (Throwable ) ( ) 11 Throwable Error JVM Exception RuntimeException Java NullPointerException null ArrayIndexOutOfBoundsException NumberFormatException (Integer parseint ) ClassCastException ( ) ArrayStoreException IllegalArgumentException InterruptedException java.io.ioexception throw NullPointerException ArrayIndexOutOfBoundsException Java (JVM) Java Java throw Throwable ; throw throw new IllegalArgumentException(" "); 11 java.lang 11 6

7 Throwable Java (Throwable ) String String getmessage() Throwable Throwable throws ( ) ( ) throws 12 { } ( ) throws ( ) ( ) 13 try (catch) Java try try { } catch ( ) { } try 14 try 12, 13 throws

8 catch try catch ( ) { } catch 1 try catch catch try catch catch try ImageIO G1101Card.java (15 17 ) finally try catch finally { try } finally 15 finally try 16 try catch try finally 17 Java Error RuntimeException ( ) java.io.ioexception throw throws Java (try ) ( ) ( ) throws ( ) (ImageIcon ) G1101Card.java G1102Card.java card.png ( ) 2 Graphics 3 drawimage ( 10 ) 15 catch finally 16 catch catch finally break return try finally 17 finally (try ) 11 8

9 Image getwidth getheight 2. 4 G1101Card.java G1103Card.java card.png Card ImageIcon getimageloadstatus 3. 4 G1101Card.java G1104Card.java ImageIO read (5 ) G801.java G1105.java $ java G1105 D13 A8 HK C100 S Integer parseint NumberFormatException try catch

10 11.6 : Font Graphics Graphics2D drawstring void setfont(font f) java.awt.font Font ( ) Font(String name, int style, int size) name style size 1 1/72 inch name "Courier New" Java 19 Font Java SERIF SANS SERIF MONOSPACED DIALOG DIALOG INPUT (serif) (serif) style Font 20 PLAIN BOLD ITALIC new Font(Font.DIALOG, Font.BOLD Font.ITALIC, 32) BOLD ITALIC ( ) 18 1 inch 25.4 mm 19 GraphicsEnvironment static GraphicsEnvironment getlocalgraphicsenvironment() Font[] getallfonts() 20 Java 11 10