DVD Management System

Class Dvdset {    //define three properties    string[] name = new STRING[50];//To ensure that the array is large enough    string[] date = new string[50];//time to borrow books 
   int[] state    = new INT[50];  The state of borrowing, 0 means lending, 1. Can borrow.    int[]    count = new INT[50];//number of borrowing books}

Import Java.util.*;import java.text.*;class dvdmgr {//Create a Dvdset object Dvdset DVD = new Dvdset ();           1. First method initializes three DVD data public void initial () {//Initialize three DVDs dvd.name[0]= "Roman Holiday";         dvd.state[0]=0;          Dvd.count[0] = 30;          Dvd.date[0]= "2016-11-18";                Dvd.name[1]= "jittery";               Dvd.state[1]=1;               dvd.name[2]= "romantic Full House";          Dvd.state[2]=1;    DVD.COUNT[2] = 10;        }//2. Implement a menu toggle public void StartMenu () {System.out.println ("*********************************");        SYSTEM.OUT.PRINTLN ("****** Welcome to use Mini DVD manager ******");        SYSTEM.OUT.PRINTLN ("****** 1. Add DVD ******");        SYSTEM.OUT.PRINTLN ("****** 2. View DVD ******");        SYSTEM.OUT.PRINTLN ("****** 3. Delete dvd ******");        SYSTEM.OUT.PRINTLN ("****** 4. Loan DVD ******");        SYSTEM.OUT.PRINTLN ("****** 5. Return DVD ******");        SYSTEM.OUT.PRINTLN ("****** 6.DVD leaderboard ******"); SySTEM.OUT.PRINTLN ("****** 7. Exit ******");        System.out.println ("*********************************");        Scanner input = new Scanner (system.in);        System.out.println ("Please enter your manipulation:");        int option = Input.nextint ();                Switch (option) {case 1:adddvd ();                Returnmenu ();            Break                Case 2:searchdvd ();                    Returnmenu ();            Break                Case 3:deletedvd ();                Returnmenu ();            Break                Case 4:lenddvd ();                Returnmenu ();            Break                Case 5:returndvd ();                Returnmenu ();            Break                Case 6:list ();                                Returnmenu ();            Break                Case 7:SYSTEM.OUT.PRINTLN ("Thank you for using, welcome next time");            Break Default:system.oUT.PRINTLN ("Input exception, program has been scared of crashing, is rebooting ...");        Break        }}//3. Return menu public void Returnmenu () {System.out.println ("Input 0 Returns:");        Scanner input = new Scanner (system.in);        if (input.nextint () = = 0) {//Enter this menu to switch StartMenu ();            }else {System.out.println ("input exception, please enter from:");  Returnmenu ();        Recursive invocation.        }}//4. View features public void Searchdvd () {System.out.println ("****** Welcome to view Page * * * * * * *");        \ t Tap System.out.println ("ordinal \ t name \t\t status \ t loan time \ T");            for (int i=0;i<dvd.name.length; i++) {if (dvd.name[i] = = null) {break; }else if (dvd.state[i] = = 0) {//represents already loaned System.out.println (i+1+ "\ T" + "<<" +dvd.name[            I]+ ">>\t has lent \ t" +dvd.date[i]); }else if (dvd.state[i] = = 1) {//Generation not lent System.out.println (i+1+ "\ T" + "<<" +dvd.name[i]+ " ;>\t can borrow \ t ");                }} System.out.println ("**************************************");        }//5. Add dvd public void Adddvd () {System.out.println ("****** Welcome to add Page * * * * *");        System.out.println ("Please enter the DVD you want to add:");        Scanner input = new Scanner (system.in);        String name = Input.next ();                Put the new content to the last for (int i = 0;i<dvd.name.length;i++) {if (dvd.name[i] = = null) {//to the last.                Dvd.name[i] = name;                Dvd.state[i] = 1;                System.out.println ("<<" +name+ ">>dvd add Success");            Break        }}}//6. Remove the DVD public void Deletedvd () {System.out.println ("****** Welcome to the DELETE page * * * * * * *");        System.out.println ("Please enter the name of the DVD you want to delete:");        Scanner input = new Scanner (system.in);        String name = Input.next (); 1. No find: Prompt not found please re-enter//2. Found://1. Has been borrowed: cannot delete//2. Not lent: Delete for (int i = 0;i<dvd.name.length;i++) {//Find out if there is an if (dvd.name[i]! = null) {if (Dvd.name[i].equalsignor Ecase (name)) {//has been found//has been lent out if (dvd.state[i] = = 0) {//Lent S                        Ystem.out.println ("+name+" has been Lent ");                    Break                            }else if (dvd.state[i] = = 1) {//No loan needed to delete//idea: 1. Replace the previous one with the latter.                                                2. Assign a value of NULL to the last superfluous place.                            for (int j = i; j<dvd.name.length;j++) {//Swap                                if (dvd.name[j +1]! = null) {Dvd.name[j] = dvd.name[j+1];                            DVD.STATE[J] = dvd.state[j+1];                                }else{//Empties last value dvd.name[j] = null;         DVD.DATE[J] = null;                       Break                        }} System.out.println ("delete" +name+ "success");                    Break                    }}}else {System.out.println ("No DVD you want to delete");                    System.out.println ("***********************************************");                Break        }}}//7. The function of borrowing DVD public void Lenddvd () {System.out.println ("******** Welcome to the Borrowing page ********");        System.out.println ("Please enter the name of the DVD you want to borrow:");        Scanner input = new Scanner (system.in);                String name = Input.next ();        1. Determine if there is a DVD//1. Not being lent out. for (int i = 0;i<dvd.name.length;i++) {if (dvd.name[i]! = NULL) {//have DVD if (Dvd.name[i].equalsi         Gnorecase (name) && Dvd.state[i] = = 1) {//have books and not be lent//borrow books           1. Modify the status Dvd.state[i] = 0;                    System.out.println ("Please enter the time of borrowing (year-month-day):");                    Scanner inputdate = new Scanner (system.in);                    Dvd.date[i] = Inputdate.next ();                    System.out.println ("library success");                    dvd.count[i]++;                Break }else if (dvd.name[i].equalsignorecase (name) && Dvd.state[i] = = 0) {System.out.println ("I'm sorry this library has                    By being lent out ");                Break                }}else {//DVD System.out.println ("No DVD you are looking for");            Break }}}//8. Also DVD calculated price public void Returndvd () {System.out.println ("******** Welcome into also DVD page ****************        **");        System.out.println ("Please enter also the name of the DVD:");        Scanner input = new Scanner (system.in);        Double price = 0.0;        String name = Input.next (); for (int i = 0;i<dvd.name.length;i++) {if (dvd.name[I]!=null) {//have if (dvd.name[i].equalsignorecase (name) && Dvd.state[i] = = 0) {//To be repaid on loan                    Dvd.state[i] = 1;                    System.out.println ("Please enter the time to return the book (year-month-day):");                    Scanner inputdate = new Scanner (system.in);                    Gets the time difference long charge = charge (Dvd.date[i],inputdate.next ());                    Price = charge * 1;                    System.out.println ("+dvd.name[i]+", "The Return of Success");                    System.out.println ("You deal with" +price+ "Yuan");                    Emptying time dvd.date[i] = null;                Break                }}else{System.out.println ("No matching information found");            Break    }} System.out.println ("************************************************"); } Public long Charge (string date1,string date2) {//Make time difference//convert String to date for calculation Simpledateforma        T sd = new SimpleDateFormat ("Yyyy-mm-dd");Long charge = 0;              try{Date D1 = sd.parse (date1);            Date D2 = Sd.parse (Date2);            The time is also measured in milliseconds.        Charge = (d2.gettime ()-d1.gettime ())/(1000*24*60*60);        }catch (ParseException e) {System.out.println (e);    } return charge;        }//Leaderboard public void list () {System.out.println ("Welcome to DVD leaderboard");                                Sort for (int i = 0; I <dvd.name.length-1;i++) {if (dvd.name[i]! = null) { for (int j = 0; j<dvd.name.length-1-i;j++) {if (dvd.name[j]! = null) {if (DVD                        . Count[j] < dvd.count[j+1]) {int temp = dvd.count[j];                        DVD.COUNT[J] = dvd.count[j+1];                                                dvd.count[j+1]= temp;                        String name1 = Dvd.name[j];                        DVD.NAME[J] = dvd.name[j+1];             DVD.NAME[J+1] = name1;               String date1= Dvd.date[j];                        DVD.DATE[J] = dvd.date[j+1];                                                    DVD.DATE[J+1] = date1;                        int state1= Dvd.state[j];                        DVD.STATE[J] = dvd.state[j+1];                        DVD.STATE[J+1] = state1;                    }}else {break;            }}}else{break;        }} System.out.println ("ordinal \ t name \t\t State \ t loan time \ T");            for (int i=0;i<dvd.name.length; i++) {if (dvd.name[i] = = null) {break; }else if (dvd.state[i] = = 0) {//represents already loaned System.out.println (i+1+ "\ T" + "<<" +dvd.name[            I]+ ">>\t has lent \ t" +dvd.date[i]); }else if (dvd.state[i] = = 1) {//Generation not lent System.out.println (i+1+ "\ T" + "<<" +dvd.name[i]+ ">>\t can borrow \ t");                }} System.out.println ("**************************************"); }    }

Class dvdmain{public    static void Main (string[] args) {        dvdmgr DVD = new Dvdmgr ();        Initialize DVD        dvd.initial ();        Start into the Toggle menu        dvd.startmenu ();}    }

DVD Management System