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Day 12/EnumDemo/src/com/demo/beans/Person.java

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+package com.demo.beans;
+
+import com.demo.enums.Gender;
+
+public class Person {
+  private int pid;
+  private String pname;
+  private Gender gender;
+public Person() {
+	super();
+}
+public Person(int pid, String pname, Gender gender) {
+	super();
+	this.pid = pid;
+	this.pname = pname;
+	this.gender = gender;
+}
+public int getPid() {
+	return pid;
+}
+public void setPid(int pid) {
+	this.pid = pid;
+}
+public String getPname() {
+	return pname;
+}
+public void setPname(String pname) {
+	this.pname = pname;
+}
+
+public Gender getGender() {
+	return gender;
+}
+
+public void setGender(Gender gender) {
+	this.gender = gender;
+}
+@Override
+public String toString() {
+	return "Person [pid=" + pid + ", pname=" + pname + ", gender=" + gender + "]";
+}
+
+
+}

Day 12/EnumDemo/src/com/demo/enums/Coffee.java

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+package com.demo.enums;
+
+public enum Coffee {
+	small(150,150.00),medium(200,250.00),large(300,350.00);
+	private int size;
+	private double price;
+    private Coffee(int size,double price) {
+    	System.out.println("in Coffee constructor "+size+"---"+price);
+    	this.size=size;
+    	this.price=price;
+    }
+	public int getSize() {
+		return size;
+	}
+
+	public double getPrice() {
+		return price;
+	}
+
+
+}

Day 12/EnumDemo/src/com/demo/enums/Gender.java

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+package com.demo.enums;
+
+public enum Gender {
+ male,female;
+
+}

Day 12/EnumDemo/src/com/demo/test/TestCoffee.java

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+package com.demo.test;
+
+import com.demo.enums.Coffee;
+
+public class TestCoffee {
+
+	public static void main(String[] args) {
+		Coffee c=Coffee.small;
+		switch(c) {
+		case small->{
+			System.out.println("Small selected "+ c.getSize()+"---->"+c.getPrice());
+		}
+		case medium->{
+			System.out.println("Medium selected"+ c.getSize()+"---->"+c.getPrice());
+		}
+		case large->{
+			System.out.println("Large selected"+ c.getSize()+"---->"+c.getPrice());
+		}
+		}
+
+	}
+
+
+
+}

Day 12/EnumDemo/src/com/demo/test/TestPerson.java

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+package com.demo.test;
+
+import java.util.Scanner;
+
+import com.demo.beans.Person;
+import com.demo.enums.Gender;
+
+public class TestPerson {
+public static void main(String[] args) {
+	Person p=new Person(11,"Shalini",Gender.female);
+	System.out.println(p);
+	for(Gender g:Gender.values()) {
+		System.out.println(g);
+	}
+	Scanner sc=new Scanner(System.in);
+	System.out.println("enetr id");
+	int pid=sc.nextInt();
+	System.out.println("enter name");
+	String nm=sc.next();
+	System.out.println("enetr gender");
+	String g=sc.next();
+	Gender g1=Gender.valueOf(g);
+	Person p2=new Person(pid,nm,g1);
+	System.out.println(p2);
+	System.out.println(Gender.valueOf(g));
+
+}
+}

Day 12/Java8Features/src/com/demo/test/TestClass.java

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+package com.demo.test;
+
+import java.util.List;
+
+public class TestClass {
+
+	public static void main(String[] args) {
+		List<Integer> lst=List.of(3,2,4,15,26,33,7,4,5);
+		lst.stream().filter(e->e>10).forEach(System.out::println);
+
+	}
+
+}

Day 12/OrderManagementSystem/src/com/demo/beans/Customer.java

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+package com.demo.beans;
+
+public class Customer {
+	private int cid;
+	private String cname;
+	private String mob;
+	public Customer() {
+		super();
+	}
+	public Customer(int cid, String cname, String mob) {
+		super();
+		this.cid = cid;
+		this.cname = cname;
+		this.mob = mob;
+	}
+
+
+	public Customer(int cid) {
+		super();
+		this.cid = cid;
+	}
+
+	@Override
+	public int hashCode() {
+		System.out.println("in hashcode "+cid);
+		return cid; ///+cname.hashCode();
+	}
+	@Override
+	public boolean equals(Object obj) {
+		System.out.println("in equals method "+this.cid+"-----"+((Customer)obj).cid);
+		return this.cid==((Customer)obj).cid;
+	}
+	public int getCid() {
+		return cid;
+	}
+	public void setCid(int cid) {
+		this.cid = cid;
+	}
+	public String getCname() {
+		return cname;
+	}
+	public void setCname(String cname) {
+		this.cname = cname;
+	}
+	public String getMob() {
+		return mob;
+	}
+	public void setMob(String mob) {
+		this.mob = mob;
+	}
+	@Override
+	public String toString() {
+		return "Customer [cid=" + cid + ", cname=" + cname + ", mob=" + mob + "]";
+	}
+
+
+}

Day 12/OrderManagementSystem/src/com/demo/beans/Item.java

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+package com.demo.beans;
+
+public class Item {
+   private int iid;
+   private String iname;
+   private int qty;
+   private double price;
+public Item() {
+	super();
+}
+public Item(int iid, String iname, int qty, double price) {
+	super();
+	this.iid = iid;
+	this.iname = iname;
+	this.qty = qty;
+	this.price = price;
+}
+
+
+public Item(int iid) {
+	super();
+	this.iid = iid;
+}
+
+
+@Override
+public boolean equals(Object obj) {
+	System.out.println("in item equals method"+this.iid+"----"+((Item)obj).iid);
+	return this.iid==((Item)obj).iid;
+}
+
+public int getIid() {
+	return iid;
+}
+public void setIid(int iid) {
+	this.iid = iid;
+}
+public String getIname() {
+	return iname;
+}
+public void setIname(String iname) {
+	this.iname = iname;
+}
+public int getQty() {
+	return qty;
+}
+public void setQty(int qty) {
+	this.qty = qty;
+}
+public double getPrice() {
+	return price;
+}
+public void setPrice(double price) {
+	this.price = price;
+}
+@Override
+public String toString() {
+	return "Item [iid=" + iid + ", iname=" + iname + ", qty=" + qty + ", price=" + price + "]";
+}
+
+}

Day 12/OrderManagementSystem/src/com/demo/dao/OrderDao.java

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+package com.demo.dao;
+
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+
+import com.demo.beans.Customer;
+import com.demo.beans.Item;
+
+public interface OrderDao {
+
+	boolean save(Customer c, List<Item> lst);
+
+	Map<Customer, List<Item>> findAll();
+
+	Entry<Customer, List<Item>> findById(int cid);
+
+	boolean removeById(int cid);
+
+	boolean addNewItem(int cid, Item item);
+
+	boolean deleteById(int cid, int iid);
+
+}

Day 12/OrderManagementSystem/src/com/demo/dao/OrderDaoImpl.java

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+package com.demo.dao;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Set;
+
+import com.demo.beans.Customer;
+import com.demo.beans.Item;
+
+public class OrderDaoImpl implements OrderDao{
+   static Map<Customer,List<Item>> hm;
+   static {
+	   hm=new HashMap<>();
+	   Customer c1=new Customer(10,"Sushrut","33333");
+	   List<Item> lst=new ArrayList<>();
+	   lst.add(new Item(1001,"Chair",34,5678));
+	   lst.add(new Item(1002,"Table",30,7678));
+	   hm.put(c1, lst);
+	   Customer c2=new Customer(11,"Pranav","4444");
+	   List<Item> lst1=new ArrayList<>();
+	   lst1.add(new Item(1001,"Shelf",40,2678));
+	   lst1.add(new Item(1002,"drawer",20,5678));
+	   hm.put(c2, lst1);
+   }
+@Override
+public boolean save(Customer c, List<Item> lst) {
+	if(!hm.containsKey(c)) {
+		hm.put(c,lst);
+		return true;
+	}
+	return false;
+}
+@Override
+public Map<Customer, List<Item>> findAll() {
+	return hm;
+}
+@Override
+public Entry<Customer, List<Item>> findById(int cid) {
+	Set<Map.Entry<Customer,List<Item>>> cset=hm.entrySet();
+	for(Map.Entry<Customer,List<Item>> e:cset) {
+		if(e.getKey().getCid()==cid)
+			return e;
+	}
+	return null;
+
+}
+@Override
+public boolean removeById(int cid) {
+	List<Item> lst= hm.remove(new Customer(cid));
+	return lst!=null;
+}
+@Override
+public boolean addNewItem(int cid, Item item) {
+	List<Item> lst=hm.get(new Customer(cid));
+	if(lst!=null) {
+		lst.add(item);
+		return true;
+	}
+	return false;
+}
+@Override
+public boolean deleteById(int cid, int iid) {
+	List<Item> lst=hm.get(new Customer(cid));
+	if(lst!=null) {
+		//add equals method in Item class
+		//also add constructor with only id in Item class
+		return lst.remove(new Item(iid));
+
+	}
+	return false;
+}  
+}

Day 12/OrderManagementSystem/src/com/demo/service/OrderService.java

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+package com.demo.service;
+
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+
+import com.demo.beans.Customer;
+import com.demo.beans.Item;
+
+public interface OrderService {
+
+	boolean addNewCustomer();
+
+	Map<Customer, List<Item>> displayAll();
+
+	Entry<Customer, List<Item>> findByCustomer(int cid);
+
+	boolean deleteById(int cid);
+
+	boolean addNewItem(int cid, Item item);
+
+	boolean removeItemById(int cid, int iid);
+
+}