java大神这道题用面向对象怎么做！才刚开始学习java谢谢了！

import java.util.Scanner;

public class Tests {
public static double zonglixi(double lilv,double jine){
double total = lilv * jine;
return total;
}

public static void main(String[] args) {
Scanner c = new Scanner(System.in);
System.out.println("请输入金额");
double jine = c.nextDouble();
System.out.println("请输入年限");
int nianxian = c.nextInt();
double lilv = 0.0;
if(nianxian<=3){
lilv = 0.0603;
}else if(3 lilv = 0.0612;
}else if(nianxian>5) {
lilv = 0.0639;
}
System.out.println("总利息"+zonglixi( lilv, jine));
System.out.println("总利息"+(zonglixi( lilv, jine)+jine)/nianxian);
}
}
自己手打的，命名什么的不规范请忽略，大致思路就这样。你凑合着看吧