java程序設計一種跨學科

㈠ java程序設計一個類

package package2;

public class ConstructionbBank extends Bank{
int saveMoney; //本金
double interest; //利息
double interestRate=0.065; //利率
double year;
public double computerInterest(){
super.year=(int)year;
double r=year-(int)year;
int day=(int)(r*1000);
double yearInterest=super.computerInterest();
double dayInterest=day*0.0001*saveMoney;
interest=yearInterest+dayInterest;
System.out.printf("%d元存在建設銀行%d年零%d天的利息：%f元\n",saveMoney,super.year,day,interest);
return interest;
}
}