java-Set Programming Exercises

Demand:

Code:

/*** * Auto Class **/ Public classCar {PrivateString brand;//Automotive Brands    Private DoublePrice//Car Price    PrivateString color;//Car Color     PublicCar () {} PublicCar (String brand,DoublePrice , String color) {         This. Setbrand (brand);  This. Setprice (price);  This. SetColor (color); }     PublicString Getbrand () {returnbrand; }     Public voidSetbrand (String brand) { This. Brand =brand; }     Public DoubleGetPrice () {returnPrice ; }     Public voidSetprice (DoublePrice ) {         This. Price =Price ; }     PublicString GetColor () {returncolor; }     Public voidsetcolor (String color) { This. color =color; } @Override PublicString toString () {return"Brands:" + brand + "\ n Price:" + (int) Price + "\ n color:" + color+ "\ n"; }    }

/*** Automobile Management class*/ImportJava.util.HashSet;ImportJava.util.Iterator;ImportJava.util.Scanner;ImportJava.util.Set; Public classCarmanager {HashSet<Car> set =NewHashset<>(); Scanner SC=NewScanner (system.in); //ways to add cars:     Public voidAdd () {Car car=NewCar (); System.out.println ("Please enter the car's brand:");        Car.setbrand (Sc.next ()); System.out.println ("Please enter the price of the car:");        Car.setprice (Sc.nextdouble ()); System.out.println ("Please enter the color of the car:");        Car.setcolor (Sc.next ());        Set.add (car); System.out.println ("Car information added successfully!!"); }    //View information for all cars     Public voidShow () {if(Set.isempty ()) {System.out.println ("No car information, just add some!"); }Else{System.out.println ("Car Info:");  for(Car car:set) {System.out.println (car); }        }            }    //Modify car information according to car brand     Public voidChangbrand () {BooleanFlag =false; System.out.println ("Please enter the car brand you want to modify:"); Scanner SC=NewScanner (system.in); String Brand=Sc.next (); System.out.println ("Please enter the price you want to modify:"); Double Price=sc.nextdouble (); Iterator<Car> it =Set.iterator ();  while(It.hasnext ()) {Car C=It.next (); if(C.getbrand (). Equals (Brand)) {C.setprice (price); Flag=true; }        }        if(flag) {System.out.println ("Modified successfully!!"); }ElseSystem.out.println ("The staff was very friendly and the staff were very friendly."); }    //How to remove a car from a car brand     Public voidRemove () {BooleanFlag =false; System.out.println ("Please enter the car brand you want to delete:"); Scanner SC=NewScanner (system.in); String Brand=Sc.next (); Set<Car> Set1 =NewHashset<car>();  for(Car car:set) {if(Car.getbrand (). Equals (Brand)) {Set1.add (car); Flag=true; }        }        if(flag) {Set.removeall (SET1); System.out.println ("Delete success!!"); }ElseSystem.out.println ("The staff was very friendly and the staff were very friendly."); }}

/*** Test Class (Program startup Class)*/ImportJava.util.Scanner; Public classCartest {//Menu Method     Public voidmenu () {System.out.println ("**************************"); System.out.println ("\T1. Adding car Information"); System.out.println ("\t2. View all car Information"); System.out.println ("\t3. Change car prices According to car brands"); System.out.println ("\t4. Remove car according to car brand"); System.out.println ("\t0. Exit program"); System.out.println ("**************************"); System.out.println ("Please enter the action you have chosen:"); }     Public Static voidMain (string[] args) {Carmanager cm=NewCarmanager (); Cartest CT=Newcartest ();        Ct.menu (); Scanner SC=NewScanner (system.in);  while(true) {            intn =Sc.nextint (); Switch(n) { Case1: Cm.add ();                Ct.menu (); Continue;  Case2: Cm.show ();                Ct.menu (); Continue;  Case3: Cm.changbrand ();                Ct.menu (); Continue;  Case4: Cm.remove ();                Ct.menu (); Continue;  Case0: System.exit (1); default: System.out.println ("Select the error, please re-select:"); }        }    }}

java-Set Programming Exercises