关于java:java-反射的应用-扩充数组

public class ArrayLenExtend {    public static Object goodCopy(Object oldArray, int newLength) {//Array类型         Class c = oldArray.getClass();         System.out.println(c.getName());//元素类型         Class componentType = c.getComponentType();         System.out.println(componentType.getName());//创立新数组         Object newArray = Array.newInstance(componentType, newLength);//拷贝        int oldLength = Array.getLength(oldArray);        System.arraycopy(oldArray, 0, newArray, 0, oldLength);//返回        return newArray;}    public static void main(String[] args) {        int[] a = {1, 2, 3, 4, 5};         a = (int[]) goodCopy(a,10);         System.out.println(a.length);    }}