java第七版课后答案第二章docxWord文档格式.docx
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- 上传时间:2022-10-16
- 格式:DOCX
- 页数:22
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java第七版课后答案第二章docxWord文档格式.docx
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{
//-----------------------------------------------------------------
//Readsthreeintegersfromtheuserandprintstheiraverage.
}
//AverageOfThree2.javaAuthor:
//AlternatesolutiontoProgrammingProject2.2
publicclassAverageOfThree2
publicstaticvoidmain(String[]args)
{
intnum1,num2,num3;
doubleaverage;
Scannerscan=newScanner(System.in);
System.out.print("
Enterthreenumbers:
"
);
num1=scan.nextInt();
num2=scan.nextInt();
num3=scan.nextInt();
average=(double)(num1+num2+num3)/3;
System.out.println("
Theaverageis:
+average);
}
//Balloons.javaAuthor:
//SolutiontoProgrammingProject2.17
importjavax.swing.JApplet;
importjava.awt.*;
publicclassBalloonsextendsJApplet
//Drawsasetofballoonsonstrings.
publicvoidpaint(Graphicspage)
setBackground(Color.white);
//drawthestrings
page.setColor(Color.black);
page.drawLine(45,95,100,300);
page.drawLine(90,100,100,300);
page.drawLine(60,100,100,300);
page.drawLine(122,85,100,300);
page.drawLine(145,115,100,300);
//drawtheballoons
page.setColor(Color.blue);
page.fillOval(20,30,50,65);
page.setColor(Color.yellow);
page.fillOval(70,40,40,60);
page.setColor(Color.red);
page.fillOval(40,50,40,55);
page.setColor(Color.green);
page.fillOval(100,30,45,55);
page.setColor(Color.cyan);
page.fillOval(120,55,50,60);
//BigDipper.javaAuthor:
//SolutiontoProgrammingProject2.16
publicclassBigDipperextendsJApplet
//DrawstheBigDipperconstellationandsomeotherstars.
setBackground(Color.black);
page.setColor(Color.white);
page.drawLine(100,80,110,120);
page.drawLine(110,120,165,115);
page.drawLine(165,115,175,70);
page.drawLine(100,80,175,70);
page.drawLine(175,70,245,20);
page.drawLine(245,20,280,30);
//Drawsomeextrastars
page.fillOval(50,50,4,4);
page.fillOval(70,150,3,3);
page.fillOval(90,30,3,3);
page.fillOval(220,140,4,4);
page.fillOval(280,170,3,3);
page.fillOval(310,100,4,4);
page.fillOval(360,20,3,3);
//BusinessCard.javaAuthor:
//SolutiontoProgrammingProject2.20
publicclassBusinessCardextendsJApplet
//Drawsabusinesscard.
setBackground(Color.yellow);
page.fillOval(10,20,60,60);
page.fillRect(25,35,130,25);
page.drawString("
JamesC.Kerplunk"
35,50);
PresidentandCEO"
85,80);
OriginSoftware,Inc."
85,100);
page.drawLine(225,20,225,80);
page.drawLine(195,50,255,50);
whereitallbegins..."
115,135);
//ChangeCounter.javaAuthor:
//SolutiontoProgrammingProject2.10
publicclassCh
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