关于java：我需要通过扫描仪的输入来设置变量值

I need my variables value to be set by the input of a scanner

基本上，第32-37行都依赖于变量vendMoney来计算AmountDue，但由于我未设置特定值，因此它给我一个"本地变量可能尚未初始化"错误。我希望将值设置为任何人输入到扫描仪中的值...

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import java.io.*;
import java.util.Scanner;
class Main {

public static void main (String[] args) {

Scanner scanner = new Scanner(System.in);
Scanner vendM = new Scanner(System.in);
int coke;
int cokePrice;
int cokeAmountDue;
int cokeStock;
int dew;
int dewPrice;
int dewAmountDue;
int dewStock;
int sprite;
int spritePrice;
int spriteAmountDue;
int spriteStock;
int changeBackCoke;
int changeBackDew;
int changeBackSprite;
int vendMoney;
int buttonPress;

cokePrice = 2;
dewPrice = 2;
spritePrice = 1;
changeBackCoke = vendMoney - cokePrice;
changeBackDew = vendMoney - dewPrice;
changeBackSprite = vendMoney - dewPrice;
cokeAmountDue = vendMoney - cokePrice;
dewAmountDue = vendMoney - dewPrice;
spriteAmountDue = vendMoney - spritePrice;
cokeStock = 10;
dewStock = 10;
spriteStock = 10;

System.out.println("Which drink would you like...");
System.out.println("");
System.out.println("Press 1 for Coke");
System.out.println("Press 2 for Mountain Dew");
System.out.println("Press 3 for Sprite");
buttonPress = scanner.nextInt();

//button presses start
if (buttonPress == 1);
{
System.out.println("");
System.out.println("Please enter $2.00");
vendMoney = scanner.nextInt();
if (vendMoney == 2){
System.out.println("");
System.out.println("Here is your coke!");
}
if (vendMoney > 2){
System.out.println("");
System.out.println("Your change is: $" + changeBackCoke);
}
if (vendMoney < 2){
System.out.println("");
System.out.println("You didn't enter the correct amount of money please enter: $" + cokeAmountDue);

cokeStock = cokeStock -1;

if (buttonPress == 2);
{
System.out.println("");
System.out.println("Please Enter $2.00"); vendMoney = scanner.nextInt();
if (vendMoney == 2){
System.out.println("");
System.out.println("Here is your Mountain Dew!");
if (vendMoney > 2){
System.out.println("");
System.out.println("Your change is: $" + changeBackDew);
}
if (vendMoney < 2){
System.out.println("");
System.out.println("You didn't enter the correct amount of money please enter: $" + dewAmountDue);
}

if (buttonPress == 3)
{
System.out.println("");
System.out.println("Please Enter $1.00"); vendMoney = scanner.nextInt();
if (vendMoney == 1){
System.out.println("");
System.out.println("Here is your Sprite!");
}
if (vendMoney > 1){
System.out.println("");
System.out.println("Your change is: $" + changeBackCoke);
}
if (vendMoney < 1){
System.out.println("");
System.out.println("You didn't enter the correct amount of money please enter: $" + spriteAmountDue);
}
//button presses end
}

}
}
}
}
}
}