Implementation of the Java container to list

Import java.util.arrays;public class collection_4_23_01 {public static void  main (String[] args)  {/* *  container  *  */arraylist_py arraylist_py1  = new arraylist_py (); Arraylist_py1.add ("Ppyy"); Arraylist_py1.add ("Ooii"); Arraylist_py1.add ("Xxqq"); Arraylist_py1.add ("Qqxx"); Arraylist_py1.add ("Qqxx"); Arraylist_py1.add ("Qqxx"); Arraylist_py1.add ("Qqxx"); Arraylist_py1.add ("Qqxx"); Arraylist_py1.add ("Qqxx"); Arraylist_py1.add ("Qqxx"); Arraylist_py1.add ("Qqxx"); Arraylist_py1.add ("Qqxx"); Arraylist_py1.add ("Qqxx"); Arraylist_py1.add ("Qqxx"); Arraylist_py1.add ("Qqxx"); Arraylist_py1.showit (); System.out.println ("The length of the array is  " +arraylist_py1.getsize ()); System.out.println ("The second element is  " +arraylist_py1.getelement (1));}} interface list {//add Element void add  (object element);//delete element void remove  (int &NBSP;IDX);//Get length int getsize  ();//Get Element object getelement (INT&NBSP;IDX);} class arraylist_py implements list {private object[] datas;//an array of stored data private int arrlength;// Array length private int size;//number of elements {Datas = new object[10];arrlength = 10;size  = 0;} public void add  (object element)  {this.datas[size] = element;// Put the data in the array this.size++;//the number of elements plus a if  (this.size >= this.arrlength)  {object[] datas2  = new Object[arrLength+10]; System.arraycopy (datas, 0, datas2, 0, datas.length); this.datas = datas2;//address Substitution}} public void remove  (INT&NBSP;IDX)  {system.arraycopy (This.datas,idx+1,this.datas,idx, this.datas.length-(idx+1)); this.size--;} public int getsize  ()  {return this.size;} Public object getelement (INT&NBSP;IDX)  {if  (idx < 0 | |  idx > this.size-1)  {throw new arrayindexoutofboundsexception ("There is a problem with the incoming location, the element cannot be found ");}RETURN&NBSP;THIS.DATAS[IDX];} public void showit  ()  {for  (int i = 0; i < this.size ;  i++)  {if  (this.datas[i] != null)  {system.out.print ("[ " +this.datas[i]+ "  ]  ");}} System.out.println ("");}}

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Implementation of the Java container to list