java封装数组类

学习数据结构，自己实现了一些数组的基本操作，里面可能会有错误，还望指正

对数组的封装操作，类似于线性表中的顺序存储

/**  * @author NeoSong* @date Oct 8, 2017 * 5:44:10 PM* program OF information: 1.自定义类MyArray来封装数组类*       2.定义操作数组类的方法      */                      public class MyArray {private T[] arr;//定义数组，默认初始值为nullprivate int last;//定义数组长度，默认初始化值为0private int maxsize;//定义数组长度的最大值//构造方法初始化变量public MyArray(){arr=(T[])new Object[50];//定义长度为50}//重载构造方法，maxsize为数组容量public MyArray(int maxsize){this.maxsize=maxsize;arr=(T[])new Object[maxsize];}//定义以下基本操作用来操作数组/* *  判断数组是否为空 */public boolean isEmpty(){return last==0;}/* * 判断数组是否为满 */public boolean isFull(){return last==maxsize;}/* * 求数组长度 */public int count(){return last;}/* * 1.附加操作 */public void attend(T ele){if(isFull()){throw new RuntimeException("数组已经满了");}arr[last++]=ele;//先赋值，后自增}/* * 2.显示数据 */public void display(){System.out.print("[");//for(long ele : arr)//System.out.print(ele+" ");for(int i=0;icount()){throw new RuntimeException("location is wrong");}if(isEmpty()){throw new RuntimeException("数组为空");}return arr[i-1];}/* * 5.插入操作 */public void insert(int i,T ele){if(i<1||i>count()){throw new RuntimeException("location is wrong");}if(isFull()){throw new RuntimeException("数组已经满了");}for(int j=last;j>=i;j--){arr[j]=arr[j-1];}arr[i-1]=ele;last++;//插入之后，别忘了last自增}/* * 6.删除操作 */public void delete(int i){if(i<1||i>count()){throw new RuntimeException("location is wrong");}if(isEmpty()){throw new RuntimeException("数组为空");}for(int j=i-1;j