importjava.util.*;publicclassRetirement2{publicstaticvoidmain(String[]args){Scannerin=newScanner(System.in);System.out.print(“Howmuchmoneywillyoucontributeeveryyear?”);do…

import java.util.*;

public class Retirement2

{

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(“Interest 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.nextLine();

}

while (input.equals(“N”));

}

}

后面input = in.nextLine();这里用next就完全正常，可以输入字符。但是用nextLine程序就自动结束了，求解。

按照你的第一种方法确实解决问题了，可是我想知道in.nextLine()返回的是哪句话，而因此结束了呢？

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