public class ComputeInterest {
    
    static double previousBalance = 100.0;

    public static void main(String args[]) {
        System.out.println(getBalance(5));
        
    }

    static double getBalance(int y) {
        if (y == 1) {
            return previousBalance * 1.05;
        } else {
            return getBalance(y - 1) * 1.05;
        }
    }
}

谢谢...
太精炼了...
学习ing....
今天第一天写java...