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算利息

import javax.swing.JOptionPane;public class Interest {    public static void main(String[] args){        double accrual;        String input = JOptionPane.showInputDialog(null,"请输入收支余额:");        String input1 = JOptionPane.showInputDialog(null,"请输入利息率:");        double balance = Double.parseDouble(input);        double interest = Double.parseDouble(input1);        accrual = (int)(balance * (interest / 1200) * 100) / 100.00;        JOptionPane.showMessageDialog(null, "The interest is " + accrual);    }        }

利用下面的公式计算下月的利息额

利息额=收支余额*(年利率/1200)