java - 如何修复我的偶数-奇数程序java代码，它写的是偶数或奇数，还有数字

Question

package practıce1.array;
public class PRACTICE1ARRAY {
    public static int evenorodd(int a) {
    @author Başar Ballıöz
        if (a % 2 == 0) {
            System.out.println("Number Is Even");
        }
        else {
            System.out.println("Number Is Odd");
        }
        return a;
    }

    public static void main(String[] args) {

       int[] arr = new int[] {2,7,9,10,22,31};
       for (int i = 0; i < arr.length; i++) {
            System.out.println("Element Of Index " + i + " = " + arr[i]);
        }    
        System.out.println(evenorodd(arr[0]));    
    }
}

输出:

run:
Element Of Index 0 = 2
Element Of Index 1 = 7
Element Of Index 2 = 9
Element Of Index 3 = 10
Element Of Index 4 = 22
Element Of Index 5 = 31
Number Is Even
2
BUILD SUCCESSFUL (total time: 0 seconds)

我不想看到数字的值。我只想看看数字是偶数还是奇数？我认为这是由于方法中发生的错误造成的

Answer 1

你的evenorodd不需要返回给它的数字，你也不需要打印给定的值。将你的方法更改为:

public static void evenorodd(int a) {
    if (a % 2 == 0) {
        System.out.println("Number Is Even");
    }
    else {
       System.out.println("Number Is Odd");
    }
}

当你调用它时，不要将方法调用放在打印语句中。

更改此:

System.out.println(evenorodd(arr[0]));

对此:

evenorodd(arr[0])