为什么在尝试打印数组方法时会出现奇怪的结果？结果：[I@6f539caf[副本]

Question

我正在尝试在第三个数组中打印第一个数组的第一个索引和第二个数组的最后一个索引。也尝试了不同的方法，但仍然失败。

我还尝试了这段代码：System.out.println（"第三个数组将是："Arrays.toString（组合OFTwoArray（firstArray， ii dArray））；出来的是：第三个数组将是：[0,0,0,0,0,0]

有什么解决办法吗？我真的很感激你能提供的任何帮助。

private static int[] combinationOFTwoArrays(int[] firstArray, int[] secondArray) {

    int firstElementOfFirstArray = firstArray[0];
    int lastElementOfSecondArray = secondArray[secondArray.length -1];

    int[] thirdArray = new int[firstElementOfFirstArray + lastElementOfSecondArray];

    return thirdArray;
}

public static void main(String[] args) {

    Scanner sc = new Scanner(System.in);
    System.out.println("Enter length of Array: ");
    int  firstArrayLenght = sc.nextInt();
    int[] firstArray = new int[firstArrayLenght];

    System.out.println("Enter length of Array: ");
    int  secondArrayLenght = sc.nextInt();
    int[] secondArray = new int[secondArrayLenght];

    System.out.println("Enter first Array: ");
    for (int i = 0; i<firstArrayLenght; i++) {
        firstArray[i] = sc.nextInt();
    }

    System.out.println("Enter Second Array: ");
    for (int k = 0; k<secondArrayLenght; k++) {
        secondArray[k] = sc.nextInt();
    }

    System.out.println("Third Array will be : " + combinationOFTwoArrays(firstArray, secondArray));
}

结果：

Enter length of Array: 
4
Enter length of Array: 
4
Enter first Array: 
 1 2 3 4 
Enter Second Array: 
5 6 7 8
Third Array will be : [I@6f539caf

Process finished with exit code 0

Answer 1

我猜你的意思是这样的：

import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        System.out.println("Enter length of Array: ");
        int firstArrayLenght = sc.nextInt();
        int[] firstArray = new int[firstArrayLenght];

        System.out.println("Enter length of Array: ");
        int secondArrayLenght = sc.nextInt();
        int[] secondArray = new int[secondArrayLenght];

        System.out.println("Enter first Array: ");
        for (int i = 0; i < firstArrayLenght; i++)
            firstArray[i] = sc.nextInt();

        System.out.println("Enter Second Array: ");
        for (int k = 0; k < secondArrayLenght; k++)
            secondArray[k] = sc.nextInt();

        System.out.println("Third Array will be : " + Arrays.toString(combinationOFTwoArrays(firstArray, secondArray)));
    }

    private static int[] combinationOFTwoArrays(int[] firstArray, int[] secondArray) {

        int firstElementOfFirstArray = firstArray[0];
        int lastElementOfSecondArray = secondArray[secondArray.length -1];

        int[] thirdArray = new int[2];
        thirdArray[0] = firstElementOfFirstArray;
        thirdArray[1] = lastElementOfSecondArray;
        return thirdArray;
    }
}

你得加上

rrays.to弦

在您的输出行中，因为函数返回int[]