//編寫一個交錯合併列表元素的函式。例如：給定的兩個列表為[a，B，C]和[1，2，3]，函式返回[a，1，B，2，C，3]。 
private static String[] getStaggeredMergeArray(String[] arr1, String[] arr2) {
    String[] arr = new String[arr1.length + arr2.length];
    int i, j;
    for (i = 0, j = 0; i < arr1.length; i++) {
        j = 2 * i;
        if (j > 2
 
 * arr2.length)//若arr1陣列長度長等於arr2
            j = arr2.length + i;
        arr[j] = arr1[i];//0 2 4 
    }
    for (i = 0, j = 0; i < arr2.length; i++) {
        j = 2 * i + 1;
        if (j > 2 * arr1.length)//若arr2陣列長度長等於arr1
            j = arr1.length + i;
        arr[j] = arr2[i];//1 3 5 
    }
    return
 
 arr;
}

public static void main(String[] args) {

    String[] arr1 = { "a", "B", "c", "D", "e" };
    String[] arr2 = { "1", "2", "3" };       

    String[] arr = getStaggeredMergeArray(arr1, arr2);

    System.out.println(Arrays.toString(arr));
}