我必須在Java中創建一個程序,該程序使用一種方法來計算未來投資價值,同時用戶輸入投資金額和利率。它必須在表格中顯示並且有1-30
年。錯誤:futureInvestmentValue無法解析爲變量
我有一個錯誤,我無法弄清楚如何解決。錯誤在//Title
的main
之下,我有futureInvestmentValue
。錯誤是告訴我,
futureInvestmentValue cannot be resolved to a variable
這裏是我的代碼:
import java.util.Scanner;
public class futureInvestmentValue {
public static double futureInvestmentValue(double investmentAmount,
double monthlyInterestRate, int years){
double futureInvestmentValue = 1;
for (years = 1; years <= 30; years++) {
monthlyInterestRate = years/1200;
futureInvestmentValue =
investmentAmount * Math.pow((1+monthlyInterestRate), years*12);
}
return futureInvestmentValue;
}
public static void main(String[] args) {
// TODO Auto-generated method stub
//Get investment amount and yearly interest rate from user
Scanner input = new Scanner (System.in);
System.out.print("Enter investment amount, for example 100:" +
"Enter yearly interest rate, for example 5.25:\n");
double investmentAmount = input.nextDouble();
double annualInterestRate = input.nextDouble();
//Title
System.out.print("Years\t" + "\t Future Value");
for (int years = 1; years <= 30; years++) {
System.out.print(years);
System.out.printf("%4d", futureInvestmentValue);
}
System.out.println();
}
}
您在'futureInvestmentValue()'中聲明瞭該變量,因此您只能在該方法中訪問該變量。如果你想在'main()'中訪問,你需要聲明它是一個靜態的類變量。另一個選擇是在最後使用'()'在打印語句中調用該方法。 – csmckelvey 2014-10-01 22:01:46
是的,因爲它不是一個變量,但你可以這樣使用它。 – njzk2 2014-10-01 22:02:00