我试图合并到具有相同大小的int类型的数组。这是我的代码

public class classA 
{ 
static int[] mergeArray(int[] arr1, int arr2[]) 
{ 
   int arr3[] = new int[arr1.length+ arr2.length]; 
   int count = 0; 
   for(int i = 0; i < arr1.length; i++){ 
       arr3[count] = arr1[i]; 
       count++; 
       arr3[count] = arr2[i]; 
    } 
    for(int i = 0; i < arr3.length; i++){ 
 
        System.out.print(arr3[i]); 
    } 
   return arr3; 
} 
 
public static void main(String[] args) throws IOException 
{ 
    int arr1[] = {1,2,3}; 
    int arr2[] = {4,5,6}; 
    int arr3[] = mergeArray(arr1,arr2); 
} 
} 

请您参考如下方法:

在for循环中，从arr2复制时，您需要增加count。

arr3[count] = arr2[i]; 
count++; 

static int[] mergeArray(int[] arr1, int[] arr2) { 
    int[] arr3 = new int[arr1.length * 2]; 
    int count = 0; 
    for (int i = 0; i < arr1.length; i++) { 
        arr3[count++] = arr1[i]; 
        arr3[count++] = arr2[i]; 
    } 
    return arr3; 
} 

int arr3[] = mergeArray(arr1, arr2); 
System.out.println(Arrays.toString(arr3)); 

static int[] mergeArray(int[] arr1, int[] arr2) { 
    return IntStream.range(0, arr1.length) 
            .flatMap(i -> IntStream.of(arr1[i], arr2[i])).toArray(); 
}