我有一个简单的方法。您不想浪费时间研究复杂的java函数或库。但返回类型应该是String。

String[] f(String[] first, String[] second) {

    // Variable declaration part
    int len1 = first.length;
    int len2 = second.length;
    int lenNew = len1 + len2;
    String[] both = new String[len1+len2];

    // For loop to fill the array "both"
    for (int i=0 ; i<lenNew ; i++){
        if (i<len1) {
            both[i] = first[i];
        } else {
            both[i] = second[i-len1];
        }
    }

    return both;

}

这么简单。。。

怎么样：

public String[] combineArray (String[] ... strings) {
    List<String> tmpList = new ArrayList<String>();
    for (int i = 0; i < strings.length; i++)
        tmpList.addAll(Arrays.asList(strings[i]));
    return tmpList.toArray(new String[tmpList.size()]);
}

如果使用这种方式，则无需导入任何第三方类。

如果要连接字符串

凹双字符串数组的示例代码

public static String[] combineString(String[] first, String[] second){
        int length = first.length + second.length;
        String[] result = new String[length];
        System.arraycopy(first, 0, result, 0, first.length);
        System.arraycopy(second, 0, result, first.length, second.length);
        return result;
    }

如果要连接Int

凹二整数数组的示例代码

public static int[] combineInt(int[] a, int[] b){
        int length = a.length + b.length;
        int[] result = new int[length];
        System.arraycopy(a, 0, result, 0, a.length);
        System.arraycopy(b, 0, result, a.length, b.length);
        return result;
    }

以下是主要方法

    public static void main(String[] args) {

            String [] first = {"a", "b", "c"};
            String [] second = {"d", "e"};

            String [] joined = combineString(first, second);
            System.out.println("concatenated String array : " + Arrays.toString(joined));

            int[] array1 = {101,102,103,104};
            int[] array2 = {105,106,107,108};
            int[] concatenateInt = combineInt(array1, array2);

            System.out.println("concatenated Int array : " + Arrays.toString(concatenateInt));

        }
    }  

我们也可以用这种方式。

仅使用Java自己的API：

String[] join(String[]... arrays) {
  // calculate size of target array
  int size = 0;
  for (String[] array : arrays) {
    size += array.length;
  }

  // create list of appropriate size
  java.util.List list = new java.util.ArrayList(size);

  // add arrays
  for (String[] array : arrays) {
    list.addAll(java.util.Arrays.asList(array));
  }

  // create and return final array
  return list.toArray(new String[size]);
}

现在，这段代码不是最有效的，但它只依赖于标准的java类，而且很容易理解。它适用于任意数量的String[]（甚至是零数组）。

哇！这里有很多复杂的答案，包括一些依赖于外部依赖的简单答案。这样做怎么样：

String [] arg1 = new String{"a","b","c"};
String [] arg2 = new String{"x","y","z"};

ArrayList<String> temp = new ArrayList<String>();
temp.addAll(Arrays.asList(arg1));
temp.addAll(Arrays.asList(arg2));
String [] concatedArgs = temp.toArray(new String[arg1.length+arg2.length]);

public int[] mergeArrays(int [] a, int [] b) {
    int [] merged = new int[a.length + b.length];
    int i = 0, k = 0, l = a.length;
    int j = a.length > b.length ? a.length : b.length;
    while(i < j) {
        if(k < a.length) {
            merged[k] = a[k];
            k++;
        }
        if((l - a.length) < b.length) {
            merged[l] = b[l - a.length];
            l++;
        }
        i++;
    }
    return merged;
}