Java实现画板
我的代码：
1 // ubuntu windows endl
2
3 import java.awt.*;
4 import java.awt.event.*;
5 import java.awt.image.*;
6 import java.io.*;
7 import javax.swing.*;
8 import javax.imageio.*;
9
10 class PainterCanvas extends Canvas {
11
12 public PainterCanvas( Color foregroundColor, int initPaintType, float lineWidth, float [] dashArray, float dashPhase, Dimension size ) {
13 setColor( foregroundColor );
14 setBackground( COLOR_BACK );
15 paintType = LINE;
16 setPaintType( initPaintType );
17 paintStroke = new BasicStroke();
18 setLineWidth( lineWidth );
19 setLineDash( dashArray, dashPhase );
20 setBufferedDimension( size );
21 startX = startY = endX = endY = 0;
22 drawBuffer = false;
23 pressed = false;
24 setCursor( Cursor.getPredefinedCursor( Cursor.CROSSHAIR_CURSOR ) );
25 addMouseListener( new
26 MouseAdapter() {
27 public void mousePressed( MouseEvent me ) {
28 if ( ! pressed ) {
29 startX = me.getX();
30 startY = me.getY();
31 pressed = true;
32 }
33 }
34 public void mouseReleased( MouseEvent me ) {
35 if ( pressed ) {
36 endX = me.getX();
37 endY = me.getY();
38 pressed = false;
39 drawBuffer = true;
40 repaint();
41 }
42 }
43 }
44 );
45 addMouseMotionListener( new MouseMotionAdapter() {
46 public void mouseDragged( MouseEvent me ) {
47 &
补充：软件开发 , Java ,
