常量和变量

public class TestConstant {
 public static void main(String[] args){
  final int APPLE_PRICE_PER_KM;//声明常量
  int weightOfApple;//声明变量
  int money;
  APPLE_PRICE_PER_KM=3;
  //APPLE_PRICE_PER_KM=5;
  
  weightOfApple=5;
  weightOfApple=6;
  weightOfApple=7;
  weightOfApple=8;
  money=APPLE_PRICE_PER_KM*weightOfApple;//计算结果
  
  System.out.println("买苹果花了"+money+"元");//结果应为24
  
 }

}