试图将两个数组合并为一个有序数组；当第一个数组小于第二个数组时，代码不起作用

Question

我正在尝试完成一项家庭作业，我的任务是在不使用 sort() 函数或任何其他预定义方法的情况下将排序数组组合成一个排序数组。

我的代码如下：

    try {

        // get input from a file

        Scanner ourScanner = new Scanner(new File(fileName));

        int numInArray1;

        int numInArray2;

        int [] array1 = null;

        int [] array2 = null;

        int [] array3 = null;

        int indexArray1 = 0;

        int indexArray2 = 0;

        int indexArray3 = 0;

        boolean run = true;

        // keep looking for more input

        while (ourScanner.hasNext()) {

            numInArray1 = ourScanner.nextInt();             // first int will be number of elements in array

            array1 = new int[numInArray1];                  // create array1 with proper quantity of space allocated

            for (int i = 0; i < numInArray1; i++) {         // puts certain number of int into the array as indicated by numInArray1

                array1[i] = ourScanner.nextInt();

            }

            numInArray2 = ourScanner.nextInt();             // next int after the integers put in the array will be number of elements in array2

            array2 = new int[numInArray2];                  // create array2 with proper quantity of space allocated

            array3 = new int[numInArray1 + numInArray2];    // create final array for both lists merged, allocate appropriate amount of space

            for (int j = 0; j < numInArray2; j++) {         // puts certain number of int into the second array as indicated by numInArray2

                array2[j] = ourScanner.nextInt();

            }

            //.out.println(Arrays.toString(array1));

            //System.out.println(Arrays.toString(array2));

        }

        /*System.out.println(Arrays.toString(array1));

        System.out.println(Arrays.toString(array2));*/

        while (run == true) {

            if (array1.length - indexArray1 == 1 && array2.length - indexArray2 == 1) {

                run = false;

            }

我的代码在第一个数组大于第二个时工作，但是当第一个数组小于第二个时我收到错误。

我不确定为什么会发生这种情况，因此将不胜感激任何朝正确方向的指导或推动。

Answer 1

我认为你应该尝试使用更多的 elseif 语句而不是那么多的 if 语句。下面是一个示例，说明您可以将其更改为 elseif 语句而不是原始 if 语句。&nbsp; &nbsp; &nbsp; &nbsp; if (array1[indexArray1] < array2[indexArray2]) {&nbsp; &nbsp; &nbsp; &nbsp; // if element in array1 is smaller than in array2&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; array3[indexArray3] = array1[indexArray1];&nbsp; &nbsp; &nbsp;&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; System.out.print(array3[indexArray3] + " ");&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; indexArray1++;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; indexArray3++;&nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; else if (array1[indexArray1] > array2[indexArray2]) {&nbsp; &nbsp; &nbsp; &nbsp; // if element in array1 is bigger than in array2&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; array3[indexArray3] = array2[indexArray2];&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; System.out.print(array3[indexArray3] + " ");&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; indexArray2++;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; indexArray3++;&nbsp; &nbsp; &nbsp; &nbsp; }另外，这里有另一个与您类似的问题：Java，均匀合并两个数组 也许那里提到了更多功能，您可以将其用于将来的参考。

Answer 2

我不确定，但我认为你应该更新听到if (array1[indexArray1] < array2[indexArray2]) {&nbsp; &nbsp; &nbsp; &nbsp;&nbsp;&nbsp; &nbsp; array3[indexArray3] = array1[indexArray1];&nbsp; &nbsp; System.out.print(array3[indexArray3] + " ");&nbsp; &nbsp; indexArray1++;&nbsp; &nbsp; indexArray3++;} else if (array1[indexArray1] > array2[indexArray2]) {&nbsp; // Update hear. Use else if instead of else.&nbsp; &nbsp; array3[indexArray3] = array2[indexArray2];&nbsp; &nbsp; System.out.print(array3[indexArray3] + " ");&nbsp; &nbsp; indexArray2++;&nbsp; &nbsp; indexArray3++;}我已经运行了你的代码，但逻辑可能有错误。所以我不确定这会帮助你。