A simple Java command line Add/Remove Contacts program (C language)

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Contact Person class:

 Public classContact {PrivateString name; PrivateString number; PrivateArraylist<contact>contacts;  PublicArraylist<contact>getcontacts () {returncontacts; }     Public voidSetcontacts (arraylist<contact>contacts) {         This. Contacts =contacts; }     PublicContact (string name, string number) {Super();  This. Name =name;  This. Number =Number ; }     PublicString GetName () {returnname; }     Public voidsetName (String name) { This. Name =name; }     PublicString GetNumber () {returnNumber ; }     Public voidSetnumber (String number) { This. Number =Number ; }    /*** Add a contact *@paramContact person to add *@returnwhether to add success*/     Public Booleanaddcontact (Contact contact) {returnContacts.add (Contact); }    /*** Delete Contacts *@paramContact person to delete *@returnwhether to delete the success*/     Public Booleandeletecontact (Contact contact) {returnContacts.remove (Contact); }}

Main program Entry class:

 Public classContactdemo {Private StaticArraylist<contact>list;  Public Static voidMain (string[] args) {Scanner Scanner=NewScanner (system.in); System.out.print ("Please enter your name:"); String name=Scanner.next (); System.out.print ("Please enter your mobile phone number:"); String Number=Scanner.next (); Contact me=NewContact (name,number); System.out.println ("Your name is:" +me.getname () + ", Mobile number:" +me.getnumber () + "."); System.out.println ("Please select your action: \na: Add contact; \NB: Delete contact \NC: Quit the program!"); String option=Scanner.next ();  while(!option.equalsignorecase ("C")){            if(Option.equalsignorecase ("A") {addcontact (scanner,me); }Else if(Option.equalsignorecase ("B") {System.out.println ("Your choice is" +option);            DeleteContact (Scanner,me); } System.out.println ("Please select your action: \na: Add contact; \NB: Delete contact \NC: Quit the program!"); Option=Scanner.next (); } System.out.println ("Thank you for your use!"); }    /*** Add Contact Action *@paramscanner Input Scan character *@paramMe Myself*/     Public Static voidaddcontact (Scanner scanner,contact me) {System.out.print ("Please enter the name of the contact you want to add:"); String ContactName=Scanner.next (); System.out.print ("Please enter the number you want to add the contact to:"); String Contactnumber=Scanner.next (); Contact=NewContact (contactname,contactnumber); if(List = =NULL) {List=NewArraylist<>();        } me.setcontacts (list); if(me.addcontact (Contact)) {System.out.println ("Add success!"); }Else{System.out.println ("Add failed!");    } showcontact (Me); }    /*** Delete Contact action *@paramscanner Input Scan character *@paramMe Myself*/     Public Static voiddeletecontact (Scanner scanner,contact me) {System.out.print ("Please enter the name of the contact you want to delete:"); String name=Scanner.next (); inti = 0; Try{             while(I <me.getcontacts (). Size ()) { Contact Contact=(Contact) me.getcontacts (). ToArray () [i]; if(Contact.getname (). Equals (name)) {if(Me.getcontacts (). Remove (Contact)) {System.out.println ("Delete succeeded!"); }Else{System.out.println ("Delete failed!");                    } showcontact (Me);  Break; }Else{i++; }            }            if(I>=me.getcontacts (). Size () &&me.getcontacts (). Size ()!=0) {System.out.println ("The contact was not found!"); }        } Catch(NullPointerException e) {e.printstacktrace (); }    }    /*** Show All contacts *@paramMe Myself*/     Public Static voidshowcontact (Contact me) {if(Me.getcontacts (). Size () = = 0) {System.out.println ("You don't have a contact yet!"); return; } System.out.println ("Now your contacts are all" +me.getcontacts (). Size () + "bit, respectively:");  for(inti = 0;i<me.getcontacts (). Size (); i++) {Contact Contact1=(Contact) me.getcontacts (). ToArray () [i]; System.out.println ("The first" + (i+1) + "bit contact name is" +contact1.getname () + ", the number is" +contact1.getnumber () + "."); }    }}

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A simple Java command line Add/Remove Contacts program (C language)