JAVA图形示例.docx

JAVA图形示例.docx

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JAVA图形示例

第一章Java与图形

例子1

importjava.applet.*;importjava.awt.*;

publicclassExample17_1extendsApplet

{publicvoidpaint（Graphicsg）

{inty,x=120;

g.drawString（"计算机科学技术",10,20）;

g.drawString（"ILoveThisGame",20,40）;

chara[]="中国科学技术大学".toCharArray（）;

for（inti=0;i

{y=2*x-200;

g.drawChars（a,i,1,x,y）;

x=x+6;

}

}

}

例子2

importjava.applet.*;importjava.awt.*;

publicclassExample17_2extendsApplet

{publicvoidpaint（Graphicsg）

{intgap=0;

for（inti=1;i<=10;i++）

{g.drawLine（10,10+5*i,180,10+5*i）;

}

for（inti=1;i<=8;i++）

{g.drawLine（40+3*i,70,40+3*i,150）;

}

g.drawLine（64,70,150,156）;

}

}

例子3

importjava.applet.*;importjava.awt.*;

publicclassExample17_3extendsApplet

{publicvoidpaint（Graphicsg）

{g.drawRect（24,22,60,34）;

g.drawRoundRect（10,10,90,60,50,30）;

g.setColor（Color.cyan）;

g.fillOval（10,80,120,60）;

intk=0;

for（inti=1;i<=8;i++）

{Colorc=newColor（i*32-1,0,0）;

g.setColor（c）;k=k+5;

g.drawOval（160+k,77+k,120-2*k,80-2*k）;

}

}

}

例子4

importjava.applet.*;importjava.awt.*;

publicclassExample17_4extendsApplet

{publicvoidpaint（Graphicsg）

{g.drawArc（0,40,100,50,0,180）;

g.drawArc（100,40,100,50,180,180）;

g.setColor（Color.blue）;

g.fillArc（0,100,40,40,0,270）;

g.setColor（Color.green）;

g.drawArc（55,120,120,60,-90,270）;

}

}

例子5

importjava.applet.*;

importjava.awt.*;

publicclassExample17_5extendsApplet

{intpx1[]={40,80,0,40};

intpy1[]={5,45,45,5};

intpx2[]={140,180,180,140,100,100,};

intpy2[]={5,25,45,65,45,25,};

publicvoidpaint（Graphicsg）

{g.drawPolygon（px1,py1,4）;//从点（40,5）画到点（80,45）,再从点（80,45）画到点（0,45）。

g.drawPolygon（px2,py2,6）;

}

}

例子6

importjava.applet.*;importjava.awt.*;

publicclassExample17_6extendsApplet

{Fontf1=newFont（"Helvetica",Font.PLAIN,28）;

Fontf2=newFont（"Helvetica",Font.BOLD,15）;

Fontf3=newFont（"Courier",Font.PLAIN,12）;

Fontf4=

newFont（"TimesRoman",Font.BOLD+Font.ITALIC,18）;

publicvoidpaint（Graphicsg）

{g.setFont（f1）;

g.drawString（"28ptplainHelvetica",5,20）;

g.setFont（f2）;

g.drawString（"15ptboldHelvetica",5,43）;

g.setFont（f3）;

g.drawString（"12ptplaincourier",5,75）;

g.setFont（f4）;

g.drawString（"18ptbold&italicTimesRoman",5,92）;

}

}

例子7

importjava.applet.*;importjava.awt.*;

publicclassExample17_7extendsApplet

{publicvoidinit（）

{setBackground（Color.yellow）;

}

publicvoidpaint（Graphicsg）

{g.setColor（Color.red）;

g.fillOval（10,10,100,100）;

g.clearRect（40,40,40,40）;

}

}

例子8

importjava.applet.*;importjava.awt.*;

importjava.awt.event.*;

publicclassExample17_8extendsApplet

{inti=0;

publicvoidpaint（Graphicsg）

{i=（i+2）%360;

Colorc=newColor（（3*i）%255,（7*i）%255,（11*i）%255）;

g.setColor（c）;g.fillArc（30,50,120,100,i,2）;

g.fillArc（30,152,120,100,i,2）;

try{//程序暂停300毫秒，再执行repaint（）（见19章）:

Thread.sleep（300）;

}

catch（InterruptedExceptione）{}

repaint（）;

}

publicvoidupdate（Graphicsg）

{g.clearRect（30,152,120,100）;

paint（g）;

}

}

例子9

importjava.awt.*;importjava.applet.*;

importjava.awt.geom.*;

publicclassExample17_9extendsApplet

{publicvoidpaint（Graphicsg）

{g.setColor（Color.red）;

Graphics2Dg_2d=（Graphics2D）g;

Line2Dline=newLine2D.Double（2,2,300,300）;

g_2d.draw（line）;

for（inti=1,k=1;i<=10;i++）

{line.setLine（10,10+k,80,10+k）;

g_2d.draw（line）;k=k+3;

}

}

}

例子10

importjava.awt.*;importjava.applet.*;

importjava.awt.geom.*;

publicclassExample17_10extendsApplet

{publicvoidpaint（Graphicsg）

{g.setColor（Color.blue）;

Graphics2Dg_2d=（Graphics2D）g;

Rectangle2Drect=

newRectangle2D.Double（20,30,30,30）;

g_2d.draw（rect）;

for（inti=1;i<=5;i++）

{rect.setRect（12,12+i,50,80）;

g_2d.draw（rect）;

}

}

}

例子11

importjava.awt.*;importjava.applet.*;

importjava.awt.geom.*;

publicclassExample17_11extendsApplet

{publicvoidpaint（Graphicsg）

{g.setColor（Color.blue）;

Graphics2Dg_2d=（Graphics2D）g;

Ellipse2Dellipse=

newEllipse2D.Double（20,30,100,50）;

g_2d.draw（ellipse）;

for（inti=1,k=0;i<=6;i++）

{ellipse.setFrame（20+k,30,100-2*k,50）;

g_2d.draw（ellipse）;k=k+5;

}

}

}

例子12

importjava.awt.*;importjava.applet.*;

importjava.awt.geom.*;

publicclassExample17_12extendsApplet

{publicvoidpaint（Graphicsg）

{g.setColor（Color.red）;

Graphics2Dg_2d=（Graphics2D）g;

Arc2Darc=

newArc2D.Double（2,30,80,55,180,-90,Arc2D.OPEN）;

g_2d.draw（arc）;

arc.setArc（90,30,90,70,0,180,Arc2D.CHORD）;

g_2d.draw（arc）;

arc.setArc（190,30,50,90,0,270,Arc2D.PIE）;

g_2d.draw（arc）;

}

}

例子13

importjava.awt.*;importjava.applet.*;

importjava.awt.geom.*;

publicclassExample17_13extendsApplet

{publicvoidpaint（Graphicsg）

{g.setColor（Color.red）;

Graphics2Dg_2d=（Graphics2D）g;

QuadCurve2DquadCurve=

newQuadCurve2D.Double（2,10,51,90,100,10）;

g_2d.draw（quadCurve）;

quadCurve.setCurve（2,100,51,10,100,100）;

g_2d.draw（quadCurve）;

}

}

例子14

importjava.awt.*;importjava.applet.*;

importjava.awt.geom.*;

publicclassExample17_14extendsApplet

{publicvoidpaint（Graphicsg）

{g.setColor（Color.red）;

Graphics2Dg_2d=（Graphics2D）g;

CubicCurve2Dcurve_1=newCubicCurve2D.Double（2,30,80,55,10,10,20,90）;

CubicCurve2Dcurve_2=newCubicCurve2D.Double（2,30,5,67,20,30,20,90）;

CubicCurve2Dcurve_3=newCubicCurve2D.Double（30,35,54,67,20,90,100,190）;

g_2d.draw（curve_1）;g_2d.draw（curve_2）;g_2d.draw（curve_3）;

}

}

例子15

importjava.awt.*;importjava.applet.*;

importjava.awt.geom.*;

publicclassExample17_15extendsApplet

{publicvoidpaint（Graphicsg）

{Graphics2Dg_2d=（Graphics2D）g;

BasicStrokebs_1

=newBasicStroke（16,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL）;

BasicStrokebs_2

=newBasicStroke（16f,BasicStroke.CAP_ROUND,BasicStroke.JOIN_MITER）;

BasicStrokebs_3

=newBasicStroke（16f,BasicStroke.CAP_SQUARE,BasicStroke.JOIN_ROUND）;

Line2Dline_1=newLine2D.Double（20,20,100,20）;

Line2Dline_2=newLine2D.Double（20,50,100,50）;

Line2Dline_3=newLine2D.Double（20,80,100,80）;

g_2d.setStroke（bs_1）;//设置线条。

g_2d.draw（line_1）;

g_2d.setStroke（bs_2）;g_2d.draw（line_2）;

g_2d.setStroke（bs_3）;g_2d.draw（line_3）;

}

}

例子16

importjava.awt.*;importjava.applet.*;

importjava.awt.geom.*;

publicclassExample17_16extendsApplet

{publicvoidpaint（Graphicsg）

{Graphics2Dg_2d=（Graphics2D）g;

g_2d.setColor（Color.cyan）;

Rectangle2Drect=newRectangle2D.Double（0,0,200,200）;

g_2d.fill（rect）;

Arc2Darc1=newArc2D.Double（0,0,200,200,0,180,Arc2D.CHORD）,

arc2=newArc2D.Double（0,0,200,200,0,-180,Arc2D.CHORD）;

RoundRectangle2DroundR1=newRoundRectangle2D.Double

（0,50,100,100,100,100）,

roundR2=newRoundRectangle2D.Double

（100,50,100,100,100,100）,

roundR3=newRoundRectangle2D.Double

（37.5,87.8,25,25,25,25）,

roundR4=newRoundRectangle2D.Double

（137.5,87.8,25,25,25,25）;

g_2d.setColor（Color.white）;g_2d.fill（arc1）;

g_2d.setColor（Color.black）;g_2d.fill（arc2）;

g_2d.fill（roundR1）;

g_2d.setColor（Color.white）;

g_2d.fill（roundR2）;g_2d.fill（roundR3）;

g_2d.setColor（Color.black）;

g_2d.fill（roundR4）;

}

}

例子17

importjava.awt.*;importjava.applet.*;

importjava.awt.geom.*;

publicclassExample17_17extendsApplet

{publicvoidpaint（Graphicsg）

{Graphics2Dg_2d=（Graphics2D）g;

GradientPaintgradient_1

=newGradientPaint（0,0,Color.red,50,50,Color.green,false）;

g_2d.setPaint（gradient_1）;

Rectangle2Drect_1=newRectangle2D.Double（0,0,50,50）;

g_2d.fill（rect_1）;

GradientPaintgradient_2

=newGradientPaint（60,50,Color.white,150,50,Color.red,false）;

g_2d.setPaint（gradient_2）;

Rectangle2Drect_2=newRectangle2D.Double（60,50,90,50）;

g_2d.fill（rect_2）;

}

}

例子18

importjava.awt.*;importjava.applet.*;

importjava.awt.geom.*;

publicclassExample17_18extendsApplet

{publicvoidpaint（Graphicsg）

{Graphics2Dg_2d=（Graphics2D）g;

Ellipse2Dellipse=

newEllipse2D.Double（20,50,120,50）;

g_2d.setColor（Color.blue）;

AffineTransformtrans=newAffineTransform（）;

for（inti=1;i<=24;i++）

{trans.rotate（15.0*Math.PI/180,80,75）;

g_2d.setTransform（trans）;

//现在画的就是旋转后的椭圆样子：

g_2d.draw（ellipse）;

}

}

}

例子19

importjava.awt.*;importjava.awt.event.*;

importjava.awt.geom.*;

importjava.applet.*;

publicclassFlowerextendsApplet

{publicvoidpaint（Graphicsg）

{Graphics2Dg_2d=（Graphics2D）g;

//花叶两边的曲线:

QuadCurve2D

curve_1=newQuadCurve2D.Double（200,200,150,160,200,100）;

CubicCurve2Dcurve_2=

newCubicCurve2D.Double（200,200,260,145,190,120,200,100）;

//花叶中的纹线:

Line2Dline=newLine2D.Double（200,200,200,110）;

QuadCurve2Dleaf_line1=

newQuadCurve2D.Double（200,180,195,175,190,170）;

QuadCurve2Dleaf_line2=

newQuadCurve2D.Double（200,180,210,175,220,170）;

QuadCurve2Dleaf_line3=

newQuadCurve2D.Double（200,160,195,155,190,150）;

QuadCurve2Dleaf_line4=

newQuadCurve2D.Double（200,160,214,155,220,150）;

//利用旋转来绘制花朵:

AffineTransformtrans=newAffineTransform（）;

for（inti=0;i<6;i++）

{trans.rotate（60*Math.PI/180,200,200）;

g_2d.setTransform（trans）;

GradientPaintgradient_1=

newGradientPaint（200,200,Color.green,200,100,Color.yellow）;

g_2d.setPaint（gradient_1）;

g_2d.fill（curve_1）;

GradientPaintgradient_2=new

GradientPaint（200,145,Color.green,260,145,Color.red,true）;

g_2d.setPaint（gradient_2）;

g_2d.fill（curve_2）;

Colorc3=newColor（0,200,0）;g_2d.setColor（c3）;

g_2d.draw（line）;

g_2d.draw（leaf_line1）;g_2d.draw（leaf_line2）;

g_2d.draw（leaf_line3）;g_2d.draw（leaf_line4）;

}

//花瓣中间的花蕾曲线:

QuadCurve2Dcenter_curve_1=

newQuadCurve2D.Double（200,200,190,185,200,180）;

AffineTransformtrans_1=newAffineTransform（）;

for（inti=0;i<12;i++）

{trans_1.rotate（30*Math.PI/180,200,200）;

g_2d.setTransform（trans_1）;

GradientPaintgradient_3=

newGradientPaint（200,200,Color.red,200,180,Color.yellow）;

g_2d.setPain