我有一个数学运算Java的错误？

Question

我创建了一个代码，用于接受用户输入，然后将5添加到它，这是代码。当我输入任何数字，则返回0编辑：我搬到了重新计算下下来主，没有什么变化

package files; 
import java.util.*; 
public class CalculatorTest { 
static Scanner userFirstNumber = new Scanner(System.in); 
static int numberReCalculated; 

public static int reCalculate(int a){ 
int numberReCalculated = a + 5; 
return numberReCalculated; 
} 
    public static void main(String[] args){ 
     int bobson; 
     System.out.print("Enter a number, I will do the rest : "); 
     bobson = userFirstNumber.nextInt(); 
     reCalculate(bobson); 
     System.out.println(numberReCalculated); 

    } 



} 

Answer 1

你的int numberReCalculated = a + 5;阴影字段声明static int numberReCalculated;声明。要么改变int numberReCalculated = a + 5;到numberReCalculated = a + 5;，或重写全部代码是惯用的和有组织的：

public class CalculatorTest { 
    static Scanner userFirstNumber = new Scanner(System.in); 

    public static int reCalculate(int a){ 
     return a + 5; 
    } 
    public static void main(String[] args){ 
     int input; 
     System.out.print("Enter a number, I will do the rest : "); 
     input = userFirstNumber.nextInt(); 
     int result = reCalculate(bobson); 
     System.out.println(result); 

    } 
} 

我不知道“BOBSON”怎么又是一个描述性的，自我记录的变量名。