Question

格式化我的代码以正确显示表格时出现问题，我不确定如何修复它。基本上，第一行数字未正确对齐以形成其他列。如何在利率下的数字末尾添加符号“％”？抱歉，我试图在这里显示输出的样子，但我无法正确显示。

public class Boo {

  public static void main(String[] args) {

    Scanner in = new Scanner(System.in);

    System.out.println("Loan amount: ");
    double loanAmount = in.nextInt();

    System.out.println("Number of years: ");
    int year = in.nextInt();

    double monthlyPayment = 0;
    double interestRate = 5.0;
    final double INCREMENT = 0.125;

    System.out.printf("%-20s   %-20s   %-20s", "Interest Rate", "Monthly    Payment", "Total Payment\n");

    for (int i = 0; i < year; i++) {
      interestRate += INCREMENT; //increment by 0.125 every year

      double monthlyInterestRate = interestRate / 1200;

      monthlyPayment = loanAmount * monthlyInterestRate / (1 - 1 / Math.pow(1 + monthlyInterestRate, year * 12));
      double totalPayment = monthlyPayment * year * 12;  
      System.out.printf("%-20.3f   %-20.2f   %-20.2f\n", interestRate, monthlyPayment, totalPayment);
    }
  }
}

Answer 1

第一列的错位是由于“总付款”标题末尾的换行符造成的。它需要位于格式字符串的末尾。

由于利率的左对齐，您需要创建一个用％符号格式化的中间字符串，然后左对齐。

我相信这段代码应该有用。

const cars = Object.values(carsinfo.cars).map((val) => ({ name: Object.keys(val)[0] }));

console.log('name: ', cars[0].name);

输出：

public static void main(String[] args)
{

    Scanner in = new Scanner(System.in);

    System.out.println("Loan amount: ");
    double loanAmount = in.nextInt();

    System.out.println("Number of years: ");
    int year = in.nextInt();

    double monthlyPayment = 0;
    double interestRate = 5.0;
    final double INCREMENT = 0.125;

    System.out.printf("%-20s   %-20s   %-20s\n", "Interest Rate", "Monthly    Payment", "Total Payment");

    for (int i = 0; i < year; i++)
    {
        interestRate += INCREMENT; // increment by 0.125 every year

        double monthlyInterestRate = interestRate / 1200;

        monthlyPayment = loanAmount * monthlyInterestRate / (1 - 1 / Math.pow(1 + monthlyInterestRate, year * 12));
        double totalPayment = monthlyPayment * year * 12;
        System.out.printf("%-20s   %-20.2f   %-20.2f\n", String.format("%.3f%%", interestRate), monthlyPayment, totalPayment);

    }

}

Answer 2

Double %%将在输出中获得单个% - 我还注意到它修复了数字列上的左缩进：

System.out.printf("%-20.3f%%   %-20.2f%%   %-20.2f%%\n", interestRate,
        monthlyPayment, totalPayment);

为什么这个`printf`格式的表的第一行没有对齐？

2 个答案: