Java数组判断偶数定义新数组，将上一个数组的偶数复制

    public static void main(String[] args) {
        int arr[] = new int[10];
        Scanner in = new Scanner(System.in);
        //循环输入10个整数
        for (int i = 0; i < arr.length; i++) {
            System.out.printf("请输入第%d个数：",i);
            arr[i] = in.nextInt();
        }
        int count=0; //记录偶数个数
        for (int i = 0; i < arr.length; i++) {
            if (arr[i]%2 ==0)
                count++;
        }

        int arr1[] = new int[count];
        int index=0;
        //把偶数赋值到arr1里面来
        for (int i = 0; i < arr.length; i++) {
            if (arr[i]%2 ==0)
                arr1[index++] = arr[i];
        }

        //循环输出
        System.out.print("偶数：");
        for (int i = 0; i < arr1.length; i++) {
            System.out.print(arr1[i] + " ");

        }
    }