Question

我的JAVA程序点击run as时显示无适用的是为什么

package com.loan;

public class Run {

public static void main(String[] args) {

//averageCapitalPlusInterest(200000.00, 0.0042, 240);
averageCapitalPlusInterest(5000000.00, 0.00375, 360);
}
public static void averageCapitalPlusInterest(double capital, double interest, int repayMonths) {
// 等额本息，即每月还款的"本金+利息"总和是确定的
double repayCapital; // 每月偿还的本金
double repayInterest; // 每月偿还的利息
double remainCapital = capital; // 本期还欠银行的本金

// 按公式计算 X=AB(1+B)^m/[(1+B)^m-1]
// temp = (1+B)^m
double temp = Math.pow((1 + interest), repayMonths);
double repayTotal = capital * interest * temp / (temp - 1);

System.out.println("月还" + String.format("%.2f", repayTotal));
System.out.println("月份\t归还本金\t归还利息\t归还总额\t仍欠银行");
for (int i = 1; i <= repayMonths; i++) {
// capital * (interest + 1);
repayInterest = remainCapital * interest; // 本期偿还的利息=仍欠本金*月利息
repayCapital = repayTotal - repayInterest; // 本期偿还的本金=本期偿还的总额-本期偿还的利息
remainCapital = remainCapital - repayCapital; // 更新本期还欠银行的本金
System.out.println(String.format("%3d", i)
+"\t"+
String.format("%.2f", repayCapital)
+"\t"+
String.format("%.2f", repayInterest)
+"\t"+
String.format("%.2f", repayTotal)
+"\t"+
String.format("%10.2f", remainCapital));
}
}
public static void averageCaptical(float capital, float interest, int repayMonths) {

// TODO
}

}

Answer 1

import java.util.Scanner;

public class Kaiba
{
	public static void main(String[] args)
	{
		Scanner scanner = new Scanner(System.in);
		System.out.print("Enter the annual interest rate> ");
		double rate = scanner.nextDouble();
		System.out.print("Enter the number of payments to be made> ");
		double made = scanner.nextDouble();
		System.out.print("Enter the loan amount> ");
		double amount = scanner.nextDouble();
		rate = rate / 1200;
		double payment = (rate * Math.pow(1 + rate, made) * amount) / (Math.pow(1 + rate, made) - 1);
		// 贷款金额
		System.out.printf("%nLoan Amount:%1$20s%2$10.2f%n", "$", amount);
		// 每月的利率
		System.out.printf("Monthly Interest Rate:%19.3f%%%n", rate * 100);
		// 数量支付
		System.out.printf("Number of Payments:%24.0f%n", made);
		// 每月的付款
		System.out.printf("Monthly Payment:%1$15s%2$11.2f%n", "$", payment);
		// 偿还金额
		System.out.printf("Amount Paid Back:%1$14s%2$10.2f%n", "$", payment * made);
		// 支付的利息
		System.out.printf("Interest Paid:%1$19s%2$10.2f", "$", payment * made - amount);
		scanner.close();

	}

}

Answer 2

有main方法,点run as 没选项吗

追问

没选项诶..我编写个hello world程序都能运行的