java - 有没有办法在分配最终变量后更改它们？

Question

import java.util.Scanner;

public class OnlineShop {

  public static void main (String[]args) {

    final double subAmmount;

    subAmmount = subAmmount + Array[i];
}

错误：

The final local variable subAmmount may have already been assigned

标签： javaarraysvariablesfinal

Answer 1

“subAmmount”尚未初始化/设置，因此您不能将 subAmmount 添加到自身，因为它不等于任何东西。