Java version of the fruit management system source code, java management system source code

Java version of the fruit management system source code, java management system source code

The Java version of the fruit management system is shared with you.

Main class FruitsDemo

/*** Function: * 1. view All fruits * 2. add a new fruit (check whether the fruit name is repeated when added) * 3. sort all fruits (price and inventory) * 4. delete the specified fruit * 5. exit the system ** Note: * 1. each fruit must have a Fruit id, fruit name, fruit quantity, and fruit price * 2. when adding a fruit, you must enter the fruit name, quantity, and price * 3. when deleting fruit, you must confirm the score twice. ** basis: functional implementation, code normalization (naming and format ), design rationality * @ author yj **/public class FruitsDemo {public static void main (String [] args) {int select = 0; // choose boolean isStart = true for the main menu function; // while (isStart) {System. out. Println ("******************** fruit Management System **************** ** \ n enter the following sequence number to select the corresponding function: \ n 1. view All fruits \ t2. add new fruits \ n 3. sort all fruits (price sorting and stock sorting) \ n 4. delete fruit \ t5. exit system "); select = Calculation. inputIsInt (); switch (select) {case 1: // 1. view All fruit Calculation. seeAllFruits (); break; case 2: // 2. add a new fruit Calculation. add (); break; case 3: // 3. order all fruits (price sorting and inventory sorting) Calculation. sort (); break; case 4: // 4. delete the fruit System. out. println ("Enter you Fruit to be deleted "); String index = Calculation. inputIsString (); System. out. println (" Secondary confirmation !!! Enter the fruit you want to delete again "); String index1 = Calculation. inputIsString (); if (index. equals (index1) {Calculation. remove (index);} else {System. out. println ("two inputs do not match. deletion failed !!! ");} Break; case 5: // 5. exit System isStart = false; break; default: System. out. println ("input error, please enter again"); break ;}} System. out. println ("the program has exited. Welcome !!! ");}}

Fruits class

/*** Fruit class ** @ author yj **/public class Fruits {// each fruit must have a Fruit id, fruit name, fruit quantity, and fruit price private int id; // ID private int nums; // quantity (inventory) private String name; // fruit name private double price; // fruit price public Fruits (int id, String name, int nums, double price) {super (); this. id = id; this. nums = nums; this. name = name; this. price = price;} public int getId () {return id;} public void setId (int id) {this. id = id;} public int getNums () {return nums;} public void setNums (int nums) {this. nums = nums;} public String getName () {return name;} public void setName (String name) {this. name = name;} public double getPrice () {return price;} public void setPrice (double price) {this. price = price ;}}

Calculation class

Import java. util. collections; import java. util. comparator; import java. util. iterator; import java. util. using list; import java. util. compute;/*** computing class, the function for storing the computing and processing data ** @ author yj **/public class Calculation {static vertex list <Fruits> list = new vertex list <Fruits> (); static pipeline SC = new pipeline (System. in); static int id = 1;/*** add fruit get () */public static void add () {int nums; String name; dou Ble price; System. out. print ("Enter the name, quantity (unit: quantity), and price (unit: RMB) \ n"); name = Calculation. inputIsString (); nums = Calculation. inputIsInt (); price = Calculation. inputIsDouble (); if (cals (name, nums, price) {list. add (new Fruits (id, name, nums, price); id ++ ;}}/*** view all Fruits seeAllFruits () */public static void seeAllFruits () {if (list. size () = 0) {System. out. println ("data is empty !!! ");} Else {Iterator <Fruits> it = list. iterator (); while (it. hasNext () {Fruits temp = it. next (); System. out. println ("ID->" + temp. getId () + "\ t fruit name->" + temp. getName () + "\ t fruit quantity->" + temp. getNums () + "\ t fruit price->" + temp. getPrice () ;}}}/*** Delete fruit remove (String index) ** @ param index * Name of the fruit you want to delete */public static void remove (String index) {Iterator <Fruits> it = list. iterator (); while (it. HasNext () {if (index. equals (it. next (). getName () {it. remove (); System. out. println (index + "deleted") ;}}/ *** determine whether cals is repeated (String name, int nums, double price) ** @ param name * fruit name * @ param nums * fruit quantity * @ param price * fruit price * @ return */public static boolean cals (String name, int nums, double price) {Iterator <Fruits> it1 = list. iterator (); while (it1.hasNext () {Fruits temp = it1.next (); if (Name. equals (temp. getName () {temp. setNums (nums + temp. getNums (); temp. setPrice (price); System. out. println ("fruit --" + name + "already exists. The quantity is added to the original base with" + nums + ". The price has been updated to" + price); return false ;}} return true;}/*** Sort output Sort () */public static void Sort () {System. out. println ("1. sort by price 2. sort by inventory in ascending order "); int n = inputIsInt (); switch (n) {case 1: Collections. sort (list, new Comparator <Fruits> () {@ Override public in T compare (Fruits o1, Fruits o2) {if (o1.getPrice ()> o2.getPrice () {return 1;} else if (o1.getPrice () <o2.getPrice ()) {return-1 ;}else {return 0 ;}// return (int) (o1.getPrice () * 100-o2.getPrice () * 100) ;}}); break; case 2: Collections. sort (list, new Comparator <Fruits> () {@ Override public int compare (Fruits o1, Fruits o2) {if (o1.getNums ()> o2.getNums () {return 1 ;} else if (o1. GetNums () <o2.getNums () {return-1 ;}else {return 0 ;}// return (int) (o1.getNums ()-o2.getNums ());}}); break; default: System. out. println ("the input command is incorrect !!! "); Break;} seeAllFruits ();}/*** whether the input is Int inputIsInt () ** @ return */public static int inputIsInt () {boolean isRight = true; int select = 0; do {try {select = SC. nextInt (); isRight = true;} catch (Exception e) {System. out. println ("the input type does not match, please enter an integer (Int)"); SC. nextLine (); isRight = false ;}} while (! IsRight); return select;}/*** whether the input is String inputIsString () ** @ return */public static String inputIsString () {boolean isRight = true; String select = null; do {try {select = SC. next (); isRight = true;} catch (Exception e) {System. out. println ("the input type does not match, please enter a String (String)"); SC. nextLine (); isRight = false ;}} while (! IsRight); return select;}/*** whether the input is Douuble ** @ return */public static Double inputIsDouble () {boolean isRight = true; Double select = null; do {try {select = SC. nextDouble (); isRight = true;} catch (Exception e) {System. out. println ("the input type does not match. Please input a decimal number (Double )!!! "); SC. nextLine (); isRight = false ;}} while (! IsRight); return select ;}}

For more information, see management system development.

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