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首先定义两个数组，这边以int数组为例
int[] arrayList={9,5,3,2,0,4};
int[] arrayList2={1,6,8,7};
方法一、ArrayUtils.addAll()方法，引入包：org.apache.commons.lang3.ArrayUtils;
int[] tempArrayList = ArrayUtils.addAll(arrayList,arrayList2);
String tempStr = Arrays.toString(tempArrayList); //将数组转化为字符串
方法二、System.arraycopy()方法
System.arraycopy(源数组，源数组起始位置，目标数组，目标数组起始位置，需要赋值数组元素长度);
int[] tempArrayList = new int[arrayList.length+arrayList2.length];
System.arraycopy(arrayList,0,tempArrayList,0,arrayList.length);
System.arraycopy(arrayList2,0,tempArrayList,arrayList.length,arrayList2.length);
String tempStr = Arrays.toString(tempArrayList); //将数组转化为字符串
方法三、Arrays.copyOf()方法
Arrays.copyOf(要复制的数组，要返回副本数组的长度);
int[] tempArrayList = Arrays.copyOf(arrayList,arrayList.length+arrayList2.length);
System.arraycopy(arrayList2,0,tempArrayList,arrayList.length,arrayList2.length);
String tempStr = Arrays.toString(tempArrayList); //将数组转化为字符串
方法四、Array.newInstance()方法
Array.newInstance(新数组的组件类型的Class对象，新数组的长度);
int[] tempArrayList = (int[])Array.newInstance(arrayList.getClass().getComponentType(),arrayList.length+arrayList2.length);
System.arraycopy(arrayList,0,tempArrayList,0,arrayList.length);
System.arraycopy(arrayList2,0,tempArrayList,arrayList.length,arrayList2.length);
String tempStr = Arrays.toString(tempArrayList); //将数组转化为字符串
代码展示：
public static void main(String[] args) {
int[] arrayList={9,5,3,2,0,4};
int[] arrayList2={1,6,8,7};
/*//方法一、ArrayUtils.addAll(数组1，数组2）；
* //ArrayUtils.addAll()方法，引入包：org.apache.commons.lang3.ArrayUtils;
* int[] tempArrayList = ArrayUtils.addAll(arrayList,arrayList2);
String tempStr = Arrays.toString(tempArrayList); //将数组转化为字符串*/
/*//方法二、System.arraycopy()方法
//System.arraycopy(源数组，源数组起始位置，目标数组，目标数组起始位置，需要赋值数组元素长度);
int[] tempArrayList = new int[arrayList.length+arrayList2.length];
System.arraycopy(arrayList,0,tempArrayList,0,arrayList.length);
System.arraycopy(arrayList2,0,tempArrayList,arrayList.length,arrayList2.length);
String tempStr = Arrays.toString(tempArrayList); //将数组转化为字符串*/
/*//方法三、Arrays.copyOf()方法
//Arrays.copyOf(要复制的数组，要返回副本数组的长度);
int[] tempArrayList = Arrays.copyOf(arrayList,arrayList.length+arrayList2.length);
System.arraycopy(arrayList2,0,tempArrayList,arrayList.length,arrayList2.length);
String tempStr = Arrays.toString(tempArrayList); //将数组转化为字符串*/
//方法四、Array.newInstance()方法
//Array.newInstance(新数组的组件类型的Class对象，新数组的长度);
int[] tempArrayList = (int[])Array.newInstance(arrayList.getClass().getComponentType(),arrayList.length+arrayList2.length);
System.arraycopy(arrayList,0,tempArrayList,0,arrayList.length);
System.arraycopy(arrayList2,0,tempArrayList,arrayList.length,arrayList2.length);
String tempStr = Arrays.toString(tempArrayList); //将数组转化为字符串
System.out.println(tempStr);
}
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