编写一个函数，输入 n 为偶数时，调用函数求 1/2+1/4+...+1/n

package cskaoyan;
 
public class cskaoyan39 {
    @org.junit.Test
    public void sum() {
        java.util.Scanner in = new java.util.Scanner(System.in);
        System.out.println("请输入一个数字：");
        int number = in.nextInt();
        double result = 0;
 
        if (odd(number)) {
            result = oddNumber(number);
        } else {
            result = evenNumber(number);
        }
 
        System.out.println(result);
        in.close();
    }
 
    public boolean odd(int number) {
        if (number % 2 != 0) {
            return true;
        } else {
            return false;
        }
    }
 
    public double evenNumber(int number) {
        double result = 0;
 
        for (int i = 2; i <= number; i += 2) {
            result += (double) 1 / i;
        }
 
        return result;
    }
 
    public double oddNumber(int number) {
        double result = 0;
 
        for (int i = 1; i <= number; i += 2) {
            result += (double) 1 / i;
        }
 
        return result;
    }
}