扩充当前array大小

package test;import java.lang.reflect.Array;import entities.Person;public class Reflection4 {public static void main(String[] args) {Person[] ps = new Person[]{new Person("dada",20),new Person("hehe", 2),new Person("tongtong",3)};Object ps2=Reflection4.incrementArray(ps);Reflection4.listArray(ps2);}/** * 扩展数组,里面的参数可以自己设置 */public static Object incrementArray(Object array) {Class elementType = array.getClass().getComponentType();int size = Array.getLength(array);Object newArray=null;newArray = Array.newInstance(elementType, size*2);for(int i=0;i<size;i++) {Object o = Array.get(array, i);Array.set(newArray, i, o);}System.out.println("数组增长之后的大小: "+Array.getLength(newArray));//也可以使用下面的方法去把原来的值给设置进扩展后的数组里面//System.arraycopy(array, 0, newArray, 0, size);return newArray;}/** * 把数组给打印出来 * @param array */public static void listArray(Object array) {int size = Array.getLength(array);for(int i=0;i<size;i++) {System.out.println(Array.get(array, i));}}}