我創建的方法中是否缺少任何內容？我對方法創作感到困惑

編寫一個程序，使用一種方法將千克轉換為磅。在循環中，調用循環體內的方法 kgTolb(kg)。方法頭定義如下：

方法頭

public static double kgToLb(double kg)
/* returns the converted pounds value where = 2.2 * kg */

創建第二個方法來打印細節行並在上面的算法中實現它。這是方法標題：

public static void print (kg, lb)
/* prints a formatted detail line*/

編寫一個程序，使用一種方法將千克轉換為磅。像我們在實驗室 9 中所做的那樣實施。在循環中，調用循環體內的方法 kgTolb(kg)。方法頭定義如下。

方法頭

public static double kgToLb(double kg)
returns the converted pounds value where lb = 2.2 * kg 

示例執行

Enter the beginning value: 1
Conversion Table From KG(s) to LB(s)
Kilograms       Pounds
---------------------
 1              2.2  
 2          4.4
 3          6.6
 4          8.8
 5          11.0
 6          13.2
 7          15.4
 8          17.6
 9          19.8              
10          22.0        
---------------------
End of Program

算法

Open keyboard for input
Prompt user for beginning value and assign to bVal
Print conversion table headings
eVal = bVal + 9
kg = bVal
while (kg <= eVal)
    lb = kgToLb(kg)
    print kg, lb to terminal //detail line
    kg = kg + 1
Print conversion table footer
Close input

第 3 節：

創建第二個方法來打印細節行並在上面的算法中實現。這是方法標題：

public static void print(kg,lb)
prints a formatted detail line as in the sample output

算法V2

Open keyboard for input
Prompt user for beginning value and assign to bVal
Print conversion table headings
eVal = bVal + 9
kg = bVal
while (kg <= eVal)

    lb = kgToLb(kg)
    print(kg,lb) //detail line
    kg = kg + 1

Print conversion table footer
Close input

第 4 節：

創建第三個方法，確保起始值大於零。這是方法標題：

public static boolean isValidBVal(bVal)
returns true if bVal is greater than 0, otherwise false

算法V3

Open keyboard for input
Prompt user for beginning value and assign to bVal
while (!isValidBVal(bVal)) //makes the method call

    Print “invalid bVal, must be greater than 0.”
    Prompt user for beginning value and assign to bVal

Print conversion table headings
eVal = bVal + 9
kg = bVal
while (kg <= eVal)

    lb = kgToLb(kg)
    print(kg,lb) //detail line
    kg = kg + 1

Print conversion table footer
Close input

我的完整程序

*/import java.util.Scanner;
public class KgTolb {
    public static void main(String[] args) {
        //Open keyboard for input
        Scanner input = new Scanner(System.in);
        //Prompt user for beginning value and assign to bVal
        System.out.println("Enter beginning value ===>   ");
        double bVal = input.nextDouble();

        //Print conversion table headings  
        System.out.println("\n Kilograms\t\t Pounds");
        double eVal = bVal + 9;
        double kg = bVal;
        
        System.out.println("----------------------");
    }
    
    public static double kgToLb(double kg) {
        double lb = kgToLb(kg);
        double kgToLbs = kg * 2.21;
        for(double i = bVal; i <= bVal + 10; i++) {
            System.out.printf("%d\t%.2f\n", i , (i * LB_PER_KG));
            
            kg = kg + 1;
            
            System.out.println("----------------------");
        }
    }
    
    //Close input