retire or not retire ? is a question.

corejava 上的一段代码 因吹思婷

"C:Program FilesJavajdk1.8.0_101injava" -Didea.launcher.port=7532 "-Didea.launcher.bin.path=C:Program Files (x86)JetBrainsIntelliJ IDEA Community Edition 2016.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_101jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_101jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_101jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_101jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_101jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_101jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_101jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_101jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_101jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_101jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_101jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_101jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_101jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_101jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_101jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_101jrelibjce.jar;C:Program FilesJavajdk1.8.0_101jrelibjfr.jar;C:Program FilesJavajdk1.8.0_101jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_101jrelibjsse.jar;C:Program FilesJavajdk1.8.0_101jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_101jrelibplugin.jar;C:Program FilesJavajdk1.8.0_101jrelib
esources.jar;C:Program FilesJavajdk1.8.0_101jrelib
t.jar;D:MyTestoutproductionMyTest;C:Program Files (x86)JetBrainsIntelliJ IDEA Community Edition 2016.3libidea_rt.jar" com.intellij.rt.execution.application.AppMain MyTest
How much money will you contribute every year
2700
Internet rate in %: 
0.1
After year 1,your balance is 2,702.70
Ready to retire?(Y/N)N
After year 2,your balance is 5,408.10
Ready to retire?(Y/N)N
After year 3,your balance is 8,116.21
Ready to retire?(Y/N)N
After year 4,your balance is 10,827.03
Ready to retire?(Y/N)N
After year 5,your balance is 13,540.55
Ready to retire?(Y/N)N
After year 6,your balance is 16,256.79
Ready to retire?(Y/N)N
After year 7,your balance is 18,975.75
Ready to retire?(Y/N)N
After year 8,your balance is 21,697.43
Ready to retire?(Y/N)

import java.util.*;

public class MyTest{
    public static void main(String[] args){
        Scanner in = new Scanner(System.in);

        System.out.print("How much money will you contribute every year");
        double payment = in.nextDouble();

        System.out.print("Internet rate in %: ");
        double interestRate = in.nextDouble();

        double balance = 0;
        int year = 0;

        String input;

        //update account balance while user isn't ready to retire
        do{
            //add this year's payment and interest
            balance += payment;
            double interest = balance * interestRate / 100;
            balance += interest;

            year++;

            //print current balance
            System.out.printf("After year %d,your balance is %,.2f%n", year, balance);

            //ask if ready to retire and get input
            System.out.print("Ready to retire?(Y/N)");
            input = in.next();
        }while(input.equals("N"));
    }
}