The operation of a little java-vector every day

Package Java_prac2;import java.util.*;/** * <p>title: Vector operations </p> * <p>description: Demonstrates the basic operation of a vector (vectors) </p> * <p>copyright:copyright (c) 2003</p> * <p>Filename:operateVector.java</p> * @ Author Wanghaitao * @version 0.1 */public class Vector_operate{/**<br> method Description: Generate a 4*4 two-dimensional Vector for use.   *<br> input parameter:*<br> output variable:vector*<br> other description: */public vector buildvector () {vector vtemps = new vector ();  for (int i=1;i<5;i++) {vector vtemp = new vector ();  for (int j=1;j<5;j++) {vtemp.addelement ("Vector (" +i+ ") (" +j+ ");   } vtemps.addelement (Vtemp); } return vtemps;} /**<br> Method Description: Insert data *<br> input parameter: Vector vtemp data object to be inserted *<br> input parameter: int iTemp position of inserted data *<br> input parameter: Object Otemp Insert data value *<br> output variable: vector result *<br> Other instructions: If the insertion position exceeds the actual location of the instance, the null*/public vector insert (vector vtemp,int Itemp,object otemp) {if (Itemp>vtemp.size ()) {print ("Data over bounds!"); return null;} else{Vtemp.insertelementat (otemp,itemp);} return vtemp;} /**<bR> Method Description: Remove data *<br> input parameters: Vector vtemp object to be deleted *<br> input parameter: int iTemp location *<br> output variable for delete data: vector*<br > Other Instructions: If you delete the data from the bounds, the null*/public vector Delete (vector vtemp,int iTemp) {if (Itemp>vtemp.size ()) {print ("Data over bounds!") will be returned; return null;} else{Vtemp.removeelementat (iTemp);} return vtemp;} /**<br> Method Description: Modify data *<br> input parameters: Vector Vtemp object to be modified *<br> input parameters: int iTemp position of modified data *<br> input parameter: Object Otemp modifying data values *<br> output variables:vector*<br> Other instructions: If you modify the data for the location bounds, the null*/public vector updata (vector vtemp,int iTemp) is returned, Object otemp) {if (Itemp>vtemp.size ()) {print ("Data over bounds!"); return null;} else{Vtemp.setelementat (otemp,itemp);} return vtemp;} /**<br> Method Description: Output information *<br> input parameter: String stemp output Information name *<br> input parameter: Object otemp output Information value *<br> return variable: none */    public void print (String stemp,vector otemp) {System.out.println (stemp+ "Data:"); This.print (otemp);} /** *<br> Method Description: PrintOut (overload) *<br> Input Parameters: Object Opara output Objects *<br> return type: no */public void Print (Object Opara) {Sy STEM.OUT.PRINTLN (oPara);}   /** *<br> Method Description: Print output (overload) *<br> input parameters: vector Vpara display output vector object *<br> return type: no */public void print (vector vpara) {   for (int i=0;i<vpara.size (); i++) {System.out.println (Vpara.elementat (i)); }}/** *<br> Method Description: Main method, program entry *<br> input parameter: string[] args *<br> return type: No */public static void main (string[] args) {Vector_operate ov = new vector_operate (); Vector vtemp = Ov.buildvector (); Ov.print ("Result of the vector", vtemp);        Vector vresult = Ov.insert (vtemp,2, "");//create a new vector and initialize Ov.print ("Insert Result", vresult);        Vector Vresultup = Ov.updata (vresult,2, ""); Ov.print ("Update results", vresultup); Vector Vresultnow = Ov.delete (vresultup,2); Ov.print ("After delete", Vresultnow);}}

The operation of a little java-vector every day