java语言程序设计第十二章练习

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1、01publicclassExercise12_01{publicstaticvoidmain{String[]args){intnuml,num2,result=0;if(args.length!=3){System.out.println("pleaseusejavaExercise12_01operancHoperatoroperand2");System.exit(1);}try{num1=Integer.parselnt(args[0]);}catch(NumberFormatExceptionex){System.out.println(”WrongInput:”+args

2、[0]);return;}try{num2=Integer.parselnt(args[2]);}catch(Exceptionex){System.out.println(”WrongInput:H+args[2]);return;}switch(args[1].charAt(0)){case*+*:result=num1+num2;break;case:result=nurrh-num2;;break;caseT:result=num1*num2;;break;case7*:result=num1/num2;;}System.out.println(args[0]+HM+args[

3、2]++result);}}021.importjava.util.Seanner;2.2.publicclassExercise12_02{3.publicstaticvoidmain(String[]args){4.Scannerinput=newScanner(System.in);6.5.booleandone=false;6.intnumberl=0;7.intnumber2=0;10.11.12.13.14.15.16.17.19.20.21.22.23.24.25.26.27.//EntertwointegersSystem.out.print("Entertwointe

4、gers:”);while(!done){try{numberl=input,nextlnt();number2=input,nextlnt();done=true;}catch(Exceptionex){ex.printStackTrace();System.out.print(input.nextLine();}}System.out.println("Incorrectinputandre-entertwointegers:n//DiscardinputHSumis”+{numberl+number2));）；28.}29.}1.importjava.util.*;2.2.pub

5、licclassExercise12_03{3.publicstaticvoidmain(String[]args){4.int[]data=newint[100];6.7.8.9.10.11.12.//Initializearrayfor(inti=data[i]=(Scannerinput=0;i<100;i++)int)(Math.random()*10000);newScanner(System.in);13.System.out.print("Enteranindex:”);44.intindex=input.nextlnt();15.16.try{17.System.out

6、.println(”Theelementis”+data[index]);48.}19.catch(Exceptionex){20.System.out.println("Indexoutofbound1*);21.}22.}23.}041.publicclassExercise12_04{2.publicstaticvoidmain(String[]args){3.try{4.newNewLoan(7.5,30,100000);5.NewLoanm=newNewLoan(-1,3,3);6.newNewLoan(7.5,30,20000);7・}8.catch{Exceptionex

7、){8.System.out.println(ex);9.}11.12.System.out.println("Endofprogram”);13.}14.}15.15.classNewLoan{仃.privatedoublearinuallnterestRate;18.privateintnumOfYears;19.privatedoubleloanAmount;21./**Defaultconstructor*/publicNewLoan(