Assignment_3 Added

Assignment_3.md

@@ -0,0 +1,243 @@
+package Core_Java_Assignments;
+
+import java.io.*;
+import java.util.ArrayList;
+import java.util.ListIterator;
+import java.util.*;
+
+class Employee implements Serializable {
+
+    String Name;
+    String Email_Address;
+    String Age;
+    String Date_Of_Birth;
+
+    public Employee(String Name, String Email_Address, String Age, String Date_Of_Birth) {
+        this.Name = Name;
+        this.Email_Address = Email_Address;
+        this.Age = Age;
+        this.Date_Of_Birth = Date_Of_Birth;
+    }
+
+    public String toString() {
+        return "name: " + Name + "Email: " + Email_Address + "Age: " + Age + "Date Of Birth: " + Date_Of_Birth;
+    }
+
+}
+
+class Assignment_3_F {
+
+    static FileOutputStream fout;
+
+////////////////////////////////////////////...Add.../////////////////////////////
+
+    void add(ArrayList<Employee> array_list) {
+
+        Scanner sc1 = new Scanner(System.in);
+        int n = sc1.nextInt();
+        for (int i = 0; i <= n; i++) {
+            Scanner sc = new Scanner(System.in);
+
+            System.out.println("Pkease Enter Name..!");
+            String Name = sc.nextLine();
+            System.out.println("Please Enter Email_Address..!");
+            String Email_Address = sc.nextLine();
+            System.out.println("Pkease Enter Age..!");
+            String Age = sc.nextLine();
+            System.out.println("please Enter Date_Of_Birth (dd/mm/yyyy)..!");
+            String Date_Of_Birth = sc.nextLine();
+
+            ObjectOutputStream oos = null;
+            array_list.add(new Employee(Name, Email_Address, Age, Date_Of_Birth));
+
+            try {
+                File file = new File("employees.txt");
+                fout = new FileOutputStream(file);
+                oos = new ObjectOutputStream(fout);
+                oos.writeObject(array_list);
+                oos.close();
+
+            } catch (Exception e) {
+                System.out.println(e);
+            }
+        }
+    }
+
+////////////////////////////////////////////Display/////////////////////////////
+
+    public void display(ArrayList<Employee> Employee1) {
+        ListIterator litr = null;
+
+        try {
+
+            FileInputStream fileIn = new FileInputStream("employees.txt");
+            ObjectInputStream objectIn = new ObjectInputStream(fileIn);
+            Employee1 = (ArrayList<Employee>) objectIn.readObject();
+            System.out.println("The Object has been read from the file");
+            objectIn.close();
+
+            litr = Employee1.listIterator();
+
+            System.out.println("\n Employees Data");
+            while (litr.hasNext()) {
+                System.out.println(litr.next());
+            }
+
+        } catch (Exception ex) {
+            ex.printStackTrace();
+        }
+
+    }
+////////////////////////////////////////////Search/////////////////////////////
+
+    public void search() {
+        ListIterator litr = null;
+        Scanner sc = new Scanner(System.in);
+        System.out.println("Please Enter Name..!");
+        String Name = sc.nextLine();
+
+        try {
+
+            FileInputStream fileIn = new FileInputStream("employees.txt");
+            ObjectInputStream objectIn = new ObjectInputStream(fileIn);
+            ArrayList<Employee> Employee1 = (ArrayList<Employee>) objectIn.readObject();
+            System.out.println("The Object has been read from the file");
+            objectIn.close();
+
+            litr = Employee1.listIterator();
+
+            System.out.println("\n Employees Data");
+            while (litr.hasNext()) {
+                Employee emp = (Employee) litr.next();
+                if (emp.Name.equals(Name)) {
+                    System.out.println(emp);
+                } else {
+                    System.out.println("Record Not Found..!");
+                }
+            }
+
+        } catch (Exception ex) {
+            ex.printStackTrace();
+
+        }
+
+    }
+    /////////////////////////////////Remove///////////////////////////
+
+    public void remove() {
+        ListIterator litr = null;
+        Scanner sc = new Scanner(System.in);
+        System.out.println("Please Enter Name..!");
+        String Name = sc.nextLine();
+
+        try {
+
+            FileInputStream fileIn = new FileInputStream("employees.txt");
+            ObjectInputStream objectIn = new ObjectInputStream(fileIn);
+            ArrayList<Employee> Employee1 = (ArrayList<Employee>) objectIn.readObject();
+            System.out.println("The Object has been read from the file");
+            objectIn.close();
+
+            litr = Employee1.listIterator();
+
+            System.out.println("\n Employees Data");
+            while (litr.hasNext()) {
+                Employee emp = (Employee) litr.next();
+                if (emp.Name.equals(Name)) {
+                    litr.remove();
+
+                } else {
+                    System.out.println("Record Not Found..!");
+                }
+            }
+
+        } catch (Exception ex) {
+            ex.printStackTrace();
+
+        }
+
+    }
+    ///////////////////////////////////////Sort/////////////////////////////
+
+    public void sort1() {
+        ListIterator litr = null;
+
+        try {
+
+            FileInputStream fileIn = new FileInputStream("employees.txt");
+            ObjectInputStream objectIn = new ObjectInputStream(fileIn);
+
+            ArrayList<Employee> Employee1 = (ArrayList<Employee>) objectIn.readObject();
+            System.out.println("The Object has been read from the file");
+            objectIn.close();
+
+            Collections.sort(Employee1, new Comparator<Employee>() {
+                public int compare(Employee emp1, Employee emp2) {
+                    return emp1.Name.compareTo(emp2.Name);
+                }
+            });
+
+            litr = Employee1.listIterator();
+
+            System.out.println("\n Employees Data");
+            while (litr.hasNext()) {
+                System.out.println(litr.next());
+
+            }
+        } catch (Exception ex) {
+            ex.printStackTrace();
+
+        }
+
+    }
+
+    public static void main(String[] args) {
+
+        Assignment_3_F f1 = new Assignment_3_F();
+        Employee em = new Employee("shubham", "Email_Address", "Age", "Date_Of_Birth");
+        ArrayList<Employee> array_list = new ArrayList<Employee>();
+
+        System.out.println(" Enter Operation Choice...!");
+        System.out.println("Menue..!");
+        System.out.println("1. Display");
+        System.out.println("2. Add");
+        System.out.println("3. Delete");
+        System.out.println("4. Search");
+        System.out.println("5. Sort");
+
+        System.out.println("Please Enter Choice...!");
+        Scanner sc = new Scanner(System.in);
+
+        int i = sc.nextInt();
+
+        switch (i) {
+
+            case 1:
+
+                f1.display(array_list);
+
+                break;
+            case 2:
+
+                f1.add(array_list);
+
+                break;
+
+            case 3:
+                f1.remove();
+
+                break;
+
+            case 4:
+
+                f1.search();
+                break;
+            case 5:
+
+                f1.sort1();
+                break;
+
+        }
+    }
+
+}