java使用Scanner类获取用户的键盘输入并使用Math中的pow方法求次方

import java.util.Scanner;
public class ComputeLoan {
  public static void main(String[] args) {   
    // Create a Scanner 创建获取用户输入的对象
    Scanner input = new Scanner(System.in);
    // Enter yearly interest rate
    System.out.print("Enter yearly interest rate, for example 8.25: ");
    double annualInterestRate = input.nextDouble();  //获取用户输入的浮点数  
    // Obtain monthly interest rate 对用户输入的浮点数除以1200
    double monthlyInterestRate = annualInterestRate / 1200;
    // Enter number of years
    System.out.print(
      "Enter number of years as an integer, for example 5: ");
    int numberOfYears = input.nextInt();//获取用户输入的整数
    // Enter loan amount
    System.out.print("Enter loan amount, for example 120000.95: ");
    double loanAmount = input.nextDouble();   //获取用户输入的浮点数  
    // Calculate payment (使用了Math类中的静态方法pow(a,b)求取啊的次方)
    double monthlyPayment = loanAmount * monthlyInterestRate / (1
      - 1 / Math.pow(1 + monthlyInterestRate, numberOfYears * 12));
    double totalPayment = monthlyPayment * numberOfYears * 12;
    // Display results
    System.out.println("The monthly payment is " + 
      (int)(monthlyPayment * 100) / 100.0);
    System.out.println("The total payment is " + 
      (int)(totalPayment * 100) / 100.0);
  }
}