Java-using reflection to achieve a general method of extending the length of an array

Method to realize universal expansion of array length by reflection

import java.lang.reflect.Array;

public class Study {
    
    

	public static void main(String[] args) {
    
    
		text t = new text();
		t.print();

		text.i = (int[]) addArray(t.i, 10);
		text.s = (String[]) addArray(t.s, 10);

		t.print();
	}

	// 实现扩展的方法
	public static Object addArray(Object array, int langth) {
    
    
		Object newArray = null;
		Class obj = array.getClass().getComponentType();// 获取原数组的类型
		newArray = Array.newInstance(obj, 10);// 根据获取的数组类型，创建一个长度为10的新数组
		System.arraycopy(array, 0, newArray, 0, Array.getLength(array));// 将原数组中的内容复制到新数组中
		return newArray;

	}

}

class text {
    
    

	static int[] i = {
    
     1, 2, 3 };// 创建int型数组
	static String[] s = {
    
     "c", "z", "m" };// 创建String型数组

	public void print() {
    
    
		// 遍历数组
		for (int x = 0; x < i.length; x++) {
    
    
			System.out.print("i[" + x + "]=" + i[x] + ",");
		}
		System.out.println();

		for (int j = 0; j < s.length; j++) {
    
    
			System.out.print("s[" + j + "]=" + s[j] + ",");
		}
		System.out.println();
	}
}