arrylist用法（Arrylist usage）.docVIP

arrylist用法（Arrylist usage） The System.Collections.ArrayList class is a special array. By adding and deleting elements, you can dynamically change the length of the array. One advantage. 1. Automatically change the size of the function 2. You can insert a flexible element 3. You can delete the flexible elements Two limitations. Compared with the general array, the speed is less Three. Add elements 1.publicvirtualintAdd (objectvalue); Add an object to the end of the ArrayList (ArrayListaList=newArrayList); AList.Add (a); AList.Add (B); AList.Add (C); AList.Add (d); AList.Add (e); The content of ABCDE 2.publicvirtualvoidInsert (intindex, objectvalue); The specified index will be inserted into the ArrayList element (ArrayListaList=newArrayList); AList.Add (a); AList.Add (B); AList.Add (C); AList.Add (d); AList.Add (e); AList.Insert (0, AA); The result is aaabcde 3.publicvirtualvoidInsertRange (intindex, ICollectionc); The specified index will be a set of elements into the ArrayList (ArrayListaList=newArrayList); AList.Add (a); AList.Add (B); AList.Add (C); AList.Add (d); AList.Add (e); (ArrayListlist2=newArrayList); List2.Add (TT); List2.Add (TTT); AList.InsertRange (2, List2); The result is abtttttcde Four. Delete A publicvirtualvoidRemove (objectobj)); Removed from the ArrayList specific object of the first match, that is the first (ArrayListaList=newArrayList); AList.Add (a); AList.Add (B); AList.Add (C); AList.Add (d); AList.Add (e); AList.Remove (a); The result is BCDE 2.publicvirtualvoidRemoveAt (intindex); The specified index removed ArrayList elements AList.Add (a); AList.Add (B); AList.Add (C); AList.Add (d); AList.Add (e); AList.RemoveAt (0); The result is BCDE 3.publicvirtualvoidRemoveRange (intindex, intcount); A range of elements removed from ArrayList. Index said the index, count said the number of starting at index AList.Add (a); AList.Add (B); AList.Add (C); AList.Add (d); AList.Add (e); AList.RemoveRange (1,3); The result is AE (4.publicvirtualvoidClear