java語言程序設(shè)計基礎(chǔ)篇第十版第十三章練習(xí)答案

1、01publicclassExercise13_01publicstaticvoidmain(String[]args)TriangleNewtriangle=newTriangleNew(11.51)triangle.setCol(“yellow“)triangle.setFilled(true)System.out.println(triangle)System.out.println(“Theareais“triangle.get

2、Area())System.out.println(“Theperimeteris“triangle.getPerimeter())System.out.println(triangle)classTriangleNewextendsGeometricObjectprivatedoubleside1=1.0side2=1.0side3=1.0ConstructpublicTriangleNew()ConstructpublicTrian

3、gleNew(doubleside1doubleside2doubleside3)this.side1=side1this.side2=side2this.side3=side3ImplementtheabstractmethodfindAreainGeometricObjectpublicdoublegetArea()doubles=(side1side2side3)2returnMath.sqrt(s(sside1)(sside2)

4、(sside3))ImplementtheabstractmethodfindCircumferenceinGeometricObjectpublicdoublegetPerimeter()returnside1side2side3@OverridepublicStringtoString()System.out.print(list.get(i)““)publicstaticvoidst(ArrayListlist)f(inti=0i

5、list.get(j).doubleValue())currentMin=list.get(j)currentMinIndex=jSwaplist.get(i)withlist.get(currentMinIndex)ifnecessaryif(currentMinIndex!=i)list.set(currentMinIndexlist.get(i))list.set(icurrentMin)04imptjava.util.publi

6、cclassExercise13_04staticMyCalendarcalendar=newMyCalendar()publicstaticvoidmain(String[]args)intmonth=calendar.get(MyCalendar.MONTH)1intyear=calendar.get(MyCalendar.YEAR)if(args.length2)System.out.println(“UsagejavaExerc